ICD-10-CM to ICD-11 Mapping
Please type ICD-10-CM code here to know the ICD-11 code and particulars
| ICD-10-CM | ICD-10-CM Description | ICD-11 | ICD-11 Descrition | Comment |
|---|
Terms & Definitions
Alternative:
Single ICD-10-CM code reproduces the complete meaning of one ICD-10-CM code.
Cluster:
Multiple ICD-11 codes representing single ICD-10-CM code.
At times, it requires multiple ICD-11 codes combined to reproduce the complete meaning of one ICD-10-CM code.
Mapping Types:
“Single Code-to-Single Code”, “Single Code-to-Cluster”, “Cluster-to-Single Code”.
Note:
More than one ICD-11 code (cluster) may be a valid translation of a given ICD-10-CM code.
Which one of those ICD-11 codes (clusters) is the most correct translation must be determined based on the clinical case.
| A00-A09 | Intestinal infectious diseases | 1A00 | "Becoming a Certified Professional Medical Biller (CPMB) opens the door to a rewarding career where your dedication and skills can make a difference in patients' lives and healthcare organizations." | |
| A00-A09 | Intestinal infectious diseases | 1A08 | Paratyphoid fever | |
| A00-A09 | Intestinal infectious diseases | 1A09.Z | Salmonella infection, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A02 | Intestinal infections due to Shigella | |
| A00-A09 | Intestinal infectious diseases | 1A0Z | Bacterial intestinal infections, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A03.Z | Intestinal infections due to Escherichia coli, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A01 | Intestinal infection due to other Vibrio | |
| A00-A09 | Intestinal infectious diseases | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A36.Z | Amoebiasis, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A3Z | Protozoal intestinal infections, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A2Z | Viral intestinal infections, unspecified | |
| A00-A09 | Intestinal infectious diseases | 1A40.Z | Infectious gastroenteritis or colitis without specification of infectious agent | |
| A00 | Cholera | 1A00 | Cholera | |
| guptha | Cholera due to Vibrio cholerae 01, biovar cholerae | 1A00&XN8P1 | Cholera / Vibrio cholerae O1, biovar cholerae | Dr Santosh |
| medesun | Cholera due to Vibrio cholerae 01, biovar eltor | 1A00&XN62R | Cholera / Vibrio cholerae O1, biovar eltor | PMBAUSA |
| A00.9 | Cholera, unspecified | 1A00 | Cholera | |
| A01 | "Becoming a Certified Professional Medical Biller (CPMB) opens the door to a rewarding career where your dedication and skills can make a difference in patients' lives and healthcare organizations." | 1A07.Z | "Becoming a Certified Professional Medical Biller (CPMB) opens the door to a rewarding career where your dedication and skills can make a difference in patients' lives and healthcare organizations." | |
| A01 | Typhoid and paratyphoid fevers | 1A08 | Paratyphoid fever | |
| A01.0 | Typhoid fever | 1A07.Z | Typhoid fever, unspecified | |
| A01.1 | Paratyphoid fever A | 1A08 | Paratyphoid fever | |
| A01.2 | Paratyphoid fever B | 1A08 | Paratyphoid fever | |
| A01.3 | Paratyphoid fever C | 1A08 | Becoming a Certified Professional Medical Biller (CPMB) opens the door to a rewarding career where your dedication and skills can make a difference in patients' lives and healthcare organizations. | Becoming a Certified Professional Medical Biller (CPMB) opens the door to a rewarding career where your dedication and skills can make a difference in patients' lives and healthcare organizations. |
| A01.4 | Paratyphoid fever, unspecified | 1A08 | Paratyphoid fever | |
| A02 | Other salmonella infections | 1A09.Z | Salmonella infection, unspecified | |
| A02.0 | Salmonella enteritis | 1A09.0 | Salmonella enteritis | |
| A02.1 | Salmonella sepsis | 1C41&XN0QE | Bacterial infection of unspecified site / Salmonellae | |
| A02.2 | Localized salmonella infections | 1A09.Z/FA10.0 | Salmonella infection, unspecified / Bacterial infection of joint | |
| A02.2 | Localized salmonella infections | 1A0Z&XN0QE | Bacterial intestinal infections, unspecified / Salmonellae | |
| A02.8 | Other specified salmonella infections | 1A09.Z | Salmonella infection, unspecified | |
| A02.9 | Salmonella infection, unspecified | 1C41 | Bacterial infection of unspecified site | |
| A03 | Shigellosis | 1A02 | Intestinal infections due to Shigella | |
| A03.0 | Shigellosis due to Shigella dysenteriae | 1A02 | Intestinal infections due to Shigella | |
| A03.1 | Shigellosis due to Shigella flexneri | 1A02 | Intestinal infections due to Shigella | |
| A03.2 | Shigellosis due to Shigella boydii | 1A02 | Intestinal infections due to Shigella | |
| A03.3 | Shigellosis due to Shigella sonnei | 1A02 | Intestinal infections due to Shigella | |
| A03.8 | Other shigellosis | 1C41 | Bacterial infection of unspecified site | |
| A03.9 | Shigellosis, unspecified | 1A02 | Intestinal infections due to Shigella | |
| A04 | Other bacterial intestinal infections | 1A0Z | Bacterial intestinal infections, unspecified | |
| A04 | Other bacterial intestinal infections | 1A03.Z | Intestinal infections due to Escherichia coli, unspecified | |
| A04 | Other bacterial intestinal infections | 1A01 | Intestinal infection due to other Vibrio | |
| A04.0 | Enteropathogenic Escherichia coli infection | 1A03.0 | Enteropathogenic Escherichia coli infection | |
| A04.1 | Enterotoxigenic Escherichia coli infection | 1A03.1 | Enterotoxigenic Escherichia coli infection | |
| A04.2 | Enteroinvasive Escherichia coli infection | 1A03.2 | Enteroinvasive Escherichia coli infection | |
| A04.3 | Enterohaemorrhagic Escherichia coli infection | 1A03.3 | Enterohaemorrhagic Escherichia coli infection | |
| A04.4 | Other intestinal Escherichia coli infections | 1A03.Z | Intestinal infections due to Escherichia coli, unspecified | |
| A04.5 | Campylobacter enteritis | 1A06 | Gastroenteritis due to Campylobacter | |
| A04.6 | Enteritis due to Yersinia enterocolitica | 1A05 | Intestinal infections due to Yersinia enterocolitica | |
| A04.7 | Enterocolitis due to Clostridium difficile | 1A04 | Intestinal infections due to Clostridioides difficile | |
| A04.7 | Enterocolitis due to Clostridium difficile | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A04.8 | Other specified bacterial intestinal infections | 1A0Z&XN9W5 | Bacterial intestinal infections, unspecified / Enterobacter | |
| A04.9 | Bacterial intestinal infection, unspecified | 1A0Z | Bacterial intestinal infections, unspecified | |
| A05 | Other bacterial foodborne intoxications, not elsewhere classified | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A05.0 | Foodborne staphylococcal intoxication | 1A10 | Foodborne staphylococcal intoxication | |
| A05.1 | Botulism | 1A11.Z | Botulism, unspecified | |
| A05.2 | Foodborne Clostridium perfringens [Clostridium welchii] intoxication | 1A12 | Foodborne Clostridium perfringens intoxication | |
| A05.3 | Foodborne Vibrio parahaemolyticus intoxication | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A05.4 | Foodborne Bacillus cereus intoxication | 1A13 | Foodborne Bacillus cereus intoxication | |
| A05.8 | Other specified bacterial foodborne intoxications | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A05.9 | Bacterial foodborne intoxication, unspecified | 1A1Z | Bacterial foodborne intoxications, unspecified | |
| A06 | Amoebiasis | 1A36.Z | Amoebiasis, unspecified | |
| A06.0 | Acute amoebic dysentery | 1A36.00 | Acute amoebiasis | |
| A06.0 | Acute amoebic dysentery | 1A36.0Z | Intestinal infections due to Entamoeba, unspecified | |
| A06.1 | Chronic intestinal amoebiasis | 1A36.0Z | Intestinal infections due to Entamoeba, unspecified | |
| A06.2 | Amoebic nondysenteric colitis | 1A36.0Z | Intestinal infections due to Entamoeba, unspecified | |
| A06.3 | Amoeboma of intestine | 1A36.01 | Amoeboma of intestine | |
| A06.4 | Amoebic liver abscess | 1A36.10 | Amoebic liver abscess | |
| A06.5 | Amoebic lung abscess | 1A36.11 | Amoebic lung abscess | |
| A06.6 | Amoebic brain abscess | 1A36.1&XA9738/1D03.3 | Extraintestinal infections due to Entamoeba / Brain / Intracranial abscess | |
| A06.7 | Cutaneous amoebiasis | 1A36.12 | Cutaneous amoebiasis | |
| A06.8 | Amoebic infection of other sites | 1A36.1 | Extraintestinal infections due to Entamoeba | |
| A06.9 | Amoebiasis, unspecified | 1A36.Z | Amoebiasis, unspecified | |
| A07 | Other protozoal intestinal diseases | 1A3Z | Protozoal intestinal infections, unspecified | |
| A07.0 | Balantidiasis | 1A30 | Infections due to Balantidium coli | |
| A07.1 | Giardiasis [lambliasis] | 1A31 | Giardiasis | |
| A07.2 | Cryptosporidiosis | 1A32 | Cryptosporidiosis | |
| A07.3 | Isosporiasis | 1A33.Z | Cystoisosporiasis, unspecified | |
| A07.8 | Other specified protozoal intestinal diseases | 1A35 | Blastocystosis | |
| A07.8 | Other specified protozoal intestinal diseases | 1A34 | Sarcocystosis | |
| A07.8 | Other specified protozoal intestinal diseases | 1A36.0Z | Intestinal infections due to Entamoeba, unspecified | |
| A07.8 | Other specified protozoal intestinal diseases | 1A3Z | Protozoal intestinal infections, unspecified | |
| A07.9 | Protozoal intestinal disease, unspecified | 1A3Z | Protozoal intestinal infections, unspecified | |
| A08 | Viral and other specified intestinal infections | 1A2Z | Viral intestinal infections, unspecified | |
| A08.0 | Rotaviral enteritis | 1A22 | Gastroenteritis due to Rotavirus | |
| A08.1 | Acute gastroenteropathy due to Norovirus | 1A23 | Enteritis due to Norovirus | |
| A08.2 | Adenoviral enteritis | 1A20 | Enteritis due to Adenovirus | |
| A08.3 | Other viral enteritis | 1A2Z | Viral intestinal infections, unspecified | |
| A08.3 | Other viral enteritis | 1A9Z | Predominantly sexually transmitted infections, unspecified | |
| A08.3 | Other viral enteritis | 1A21 | Gastroenteritis due to Astrovirus | |
| A08.4 | Viral intestinal infection, unspecified | 1A2Z | Viral intestinal infections, unspecified | |
| A08.5 | Other specified intestinal infections | Gastroenteritis or colitis of infectious origin | ||
| A08.5 | Other specified intestinal infections | 1A24 | Intestinal infections due to Cytomegalovirus | |
| A09 | Other gastroenteritis and colitis of infectious and unspecified origin | 1A40.Z | Infectious gastroenteritis or colitis without specification of infectious agent | |
| A09.0 | Other and unspecified gastroenteritis and colitis of infectious origin | 1A40.Z | Infectious gastroenteritis or colitis without specification of infectious agent | |
| A09.9 | Gastroenteritis and colitis of unspecified origin | 1A40.0 | Gastroenteritis or colitis without specification of origin | |
| A15-A19 | Tuberculosis | 1B1Z | Tuberculosis, unspecified | |
| A15 | Respiratory tuberculosis, bacteriologically and histologically confirmed | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.0 | Tuberculosis of lung, confirmed by sputum microscopy with or without culture | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.1 | Tuberculosis of lung, confirmed by culture only | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.2 | Tuberculosis of lung, confirmed histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.3 | Tuberculosis of lung, confirmed by unspecified means | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.4 | Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.5 | Tuberculosis of larynx, trachea and bronchus, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.6 | Tuberculous pleurisy, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.7 | Primary respiratory tuberculosis, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.8 | Other respiratory tuberculosis, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A15.9 | Respiratory tuberculosis unspecified, confirmed bacteriologically and histologically | 1B10.0 | Respiratory tuberculosis, confirmed | |
| A16 | Respiratory tuberculosis, not confirmed bacteriologically or histologically | 1B10.1 | Respiratory tuberculosis, not confirmed | |
| A16.0 | Tuberculosis of lung, bacteriologically and histologically negative | 1B10.1 | Respiratory tuberculosis, not confirmed | |
| A16.1 | Tuberculosis of lung, bacteriological and histological examination not done | 1B10.1 | Respiratory tuberculosis, not confirmed | |
| A16.2 | Tuberculosis of lung, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.3 | Tuberculosis of intrathoracic lymph nodes, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.4 | Tuberculosis of larynx, trachea and bronchus, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.5 | Tuberculous pleurisy, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.7 | Primary respiratory tuberculosis without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.8 | Other respiratory tuberculosis, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A16.9 | Respiratory tuberculosis unspecified, without mention of bacteriological or histological confirmation | 1B10.Z | Respiratory tuberculosis, without mention of bacteriological or histological confirmation | |
| A17 | Tuberculosis of nervous system | 1B11.Z | Tuberculosis of the nervous system, unspecified | |
| A17.0 | Tuberculous meningitis | 1B11.0 | Tuberculous meningitis | |
| A17.1 | Meningeal tuberculoma | 1B11.2 | Meningeal tuberculoma | |
| A17.8 | Other tuberculosis of nervous system | 1B11.Z | Tuberculosis of the nervous system, unspecified | |
| A17.8 | Other tuberculosis of nervous system | 1B11.1 | Tuberculous meningoencephalitis | |
| A17.9 | Tuberculosis of nervous system, unspecified | 1B11.Z | Tuberculosis of the nervous system, unspecified | |
| A18 | Tuberculosis of other organs | 1B12 | Tuberculosis of other systems and organs | |
| A18.0 | Tuberculosis of bones and joints | 1B12.40 | Tuberculosis of bones or joints | |
| A18.1 | Tuberculosis of genitourinary system | 1B12.5 | Tuberculosis of the genitourinary system | |
| A18.2 | Tuberculous peripheral lymphadenopathy | 1B12.6 | Tuberculous peripheral lymphadenopathy | |
| A18.3 | Tuberculosis of intestines, peritoneum and mesenteric glands | 1B12.7 | Tuberculosis of the digestive system | |
| A18.4 | Tuberculosis of skin and subcutaneous tissue | 1B12.8 | Cutaneous tuberculosis | |
| A18.5 | Tuberculosis of eye | 1B12.1 | Tuberculosis of eye | |
| A18.6 | Tuberculosis of ear | 1B12.2 | Tuberculosis of ear | |
| A18.7 | Tuberculosis of adrenal glands | 1B12.3&XA0NE9 | Tuberculosis of endocrine glands / Adrenal gland | |
| A18.8 | Tuberculosis of other specified organs | 1B12 | Tuberculosis of other systems and organs | |
| A18.8 | Tuberculosis of other specified organs | 1B12.7 | Tuberculosis of the digestive system | |
| A18.8 | Tuberculosis of other specified organs | 1B12.3&XA8RK3 | Tuberculosis of endocrine glands / Thyroid gland | |
| A19 | Miliary tuberculosis | 1B13.Z | Miliary tuberculosis, unspecified | |
| A19.0 | Acute miliary tuberculosis of a single specified site | 1B13.0 | Acute miliary tuberculosis of a single specified site | |
| A19.1 | Acute miliary tuberculosis of multiple sites | 1B13.1 | Acute miliary tuberculosis of multiple sites | |
| A19.2 | Acute miliary tuberculosis, unspecified | 1B13.Z | Miliary tuberculosis, unspecified | |
| A19.8 | Other miliary tuberculosis | 1B13.Z | Miliary tuberculosis, unspecified | |
| A19.9 | Miliary tuberculosis, unspecified | 1B13.Z | Miliary tuberculosis, unspecified | |
| A20-A28 | Certain zoonotic bacterial diseases | 1B9Z | Unspecified zoonotic bacterial disease | |
| A20 | Plague | 1B93.Z | Plague, unspecified | |
| A20.0 | Bubonic plague | 1B93.0 | Bubonic plague | |
| A20.1 | Cellulocutaneous plague | 1B93.1 | Cellulocutaneous plague | |
| A20.2 | Pneumonic plague | 1B93.2 | Pneumonic plague | |
| A20.3 | Plague meningitis | 1B93.3 | Plague meningitis | |
| A20.7 | Septicaemic plague | 1B93.Z | Plague, unspecified | |
| A20.8 | Other forms of plague | 1B93.Z | Plague, unspecified | |
| A20.9 | Plague, unspecified | 1B93.Z | Plague, unspecified | |
| A21 | Tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.0 | Ulceroglandular tularaemia | 1B94.0 | Ulceroglandular tularaemia | |
| A21.1 | Oculoglandular tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.2 | Pulmonary tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.3 | Gastrointestinal tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.7 | Generalized tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.8 | Other forms of tularaemia | 1B94.Z | Tularaemia, unspecified | |
| A21.9 | Tularaemia, unspecified | 1B94.Z | Tularaemia, unspecified | |
| A22 | Anthrax | 1B97 | Anthrax | |
| A22.0 | Cutaneous anthrax | 1B97 | Anthrax | |
| A22.1 | Pulmonary anthrax | 1B97 | Anthrax | |
| A22.2 | Gastrointestinal anthrax | 1B97 | Anthrax | |
| A22.7 | Anthrax sepsis | 1B97 | Anthrax | |
| A22.8 | Other forms of anthrax | 1B97 | Anthrax | |
| A22.9 | Anthrax, unspecified | 1B97 | Anthrax | |
| A23 | Brucellosis | 1B95 | Brucellosis | |
| A23.0 | Brucellosis due to Brucella melitensis | 1B95 | Brucellosis | |
| A23.1 | Brucellosis due to Brucella abortus | 1B95 | Brucellosis | |
| A23.2 | Brucellosis due to Brucella suis | 1B95 | Brucellosis | |
| A23.3 | Brucellosis due to Brucella canis | 1B95 | Brucellosis | |
| A23.8 | Other brucellosis | 1B95 | Brucellosis | |
| A23.9 | Brucellosis, unspecified | 1B95 | Brucellosis | |
| A24 | Glanders and melioidosis | 1B92 | Glanders | |
| A24 | Glanders and melioidosis | 1C42 | Melioidosis | |
| A24.0 | Glanders | 1B92 | Glanders | |
| A24.1 | Acute and fulminating melioidosis | 1C42 | Melioidosis | |
| A24.2 | Subacute and chronic melioidosis | 1C42 | Melioidosis | |
| A24.3 | Other melioidosis | 1C42 | Melioidosis | |
| A24.4 | Melioidosis, unspecified | 1C42 | Melioidosis | |
| A25 | Rat-bite fevers | 1B90 | Rat-bite fevers | |
| A25.0 | Spirillosis | 1B90.0 | Spirillosis | |
| A25.1 | Streptobacillosis | 1B90.1 | Streptobacillosis | |
| A25.9 | Rat-bite fever, unspecified | 1B90 | Rat-bite fevers | |
| A26 | Erysipeloid | 1B96 | Erysipeloid | |
| A26.0 | Cutaneous erysipeloid | 1B96 | Erysipeloid | |
| A26.7 | Erysipelothrix sepsis | 1B96&XN494 | Erysipeloid / Erysipelothrix | |
| A26.8 | Other forms of erysipeloid | 1B96 | Erysipeloid | |
| A26.9 | Erysipeloid, unspecified | 1B96 | Erysipeloid | |
| A27 | Leptospirosis | 1B91 | Leptospirosis | |
| A27.0 | Leptospirosis icterohaemorrhagica | 1B91 | Leptospirosis | |
| A27.8 | Other forms of leptospirosis | 1B91 | Leptospirosis | |
| A27.9 | Leptospirosis, unspecified | 1B91 | Leptospirosis | |
| A28 | Other zoonotic bacterial diseases, not elsewhere classified | 1B9Z | Unspecified zoonotic bacterial disease | |
| A28.0 | Pasteurellosis | 1B99 | Pasteurellosis | |
| A28.1 | Cat-scratch disease | 1B98 | Cat-scratch disease | |
| A28.2 | Extraintestinal yersiniosis | 1B9A | Extraintestinal yersiniosis | |
| A28.8 | Other specified zoonotic bacterial diseases, not elsewhere classified | 1B9Z | Unspecified zoonotic bacterial disease | |
| A28.9 | Zoonotic bacterial disease, unspecified | 1B9Z | Unspecified zoonotic bacterial disease | |
| A30-A49 | Other bacterial diseases | 1B20.Z | Leprosy, unspecified | |
| A30-A49 | Other bacterial diseases | 1B21.Z | Non-tuberculous mycobacterial infection of unspecified site | |
| A30-A49 | Other bacterial diseases | 1C1A.Z | Listeriosis, unspecified | |
| A30-A49 | Other bacterial diseases | 1C15 | Tetanus neonatorum | |
| A30-A49 | Other bacterial diseases | 1C14 | Obstetrical tetanus | |
| A30-A49 | Other bacterial diseases | 1C13 | Tetanus | |
| A30-A49 | Other bacterial diseases | 1C17.Z | Diphtheria, unspecified | |
| A30-A49 | Other bacterial diseases | 1C12.Z | Whooping cough, unspecified | |
| A30-A49 | Other bacterial diseases | 1B50 | Scarlet fever | |
| A30-A49 | Other bacterial diseases | 1C1C.Z | Meningococcal disease, unspecified | |
| A30-A49 | Other bacterial diseases | 1G40 | Sepsis without septic shock | |
| A30-A49 | Other bacterial diseases | 1C10.Z | Actinomycosis, unspecified | |
| A30-A49 | Other bacterial diseases | 1C1B.Z | Nocardiosis, unspecified | |
| A30-A49 | Other bacterial diseases | 1C11 | Bartonellosis | |
| A30-A49 | Other bacterial diseases | 1B70.0 | Erysipelas | |
| A30-A49 | Other bacterial diseases | 1B70.Z | Bacterial cellulitis or lymphangitis due to unspecified bacterium | |
| A30-A49 | Other bacterial diseases | 1C4Z | Unspecified bacterial disease | |
| A30-A49 | Other bacterial diseases | 1C41 | Bacterial infection of unspecified site | |
| A30 | Leprosy [Hansen disease] | 1B20.Z | Leprosy, unspecified | |
| A30.0 | Indeterminate leprosy | 1B20.0 | Paucibacillary leprosy | |
| A30.1 | Tuberculoid leprosy | 1B20.0 | Paucibacillary leprosy | |
| A30.2 | Borderline tuberculoid leprosy | 1B20.0 | Paucibacillary leprosy | |
| A30.3 | Borderline leprosy | 1B20.1 | Multibacillary leprosy | |
| A30.4 | Borderline lepromatous leprosy | 1B20.1 | Multibacillary leprosy | |
| A30.5 | Lepromatous leprosy | 1B20.1 | Multibacillary leprosy | |
| A30.8 | Other forms of leprosy | 1B20.Z | Leprosy, unspecified | |
| A30.9 | Leprosy, unspecified | 1B20.Z | Leprosy, unspecified | |
| A31 | Infection due to other mycobacteria | 1B21.Z | Non-tuberculous mycobacterial infection of unspecified site | |
| A31.0 | Pulmonary mycobacterial infection | 1B21.0 | Pulmonary infection due to non-tuberculous mycobacterium | |
| A31.1 | Cutaneous mycobacterial infection | EA5Z | Cutaneous involvement by unspecified bacterial infection | |
| A31.8 | Other mycobacterial infections | 1B21.Z | Non-tuberculous mycobacterial infection of unspecified site | |
| A31.9 | Mycobacterial infection, unspecified | 1B21.Z | Non-tuberculous mycobacterial infection of unspecified site | |
| A32 | Listeriosis | 1C1A.Z | Listeriosis, unspecified | |
| A32.0 | Cutaneous listeriosis | 1C1A.0 | Cutaneous listeriosis | |
| A32.1 | Listerial meningitis and meningoencephalitis | 1C1A.1 | Listerial meningitis or meningoencephalitis | |
| A32.7 | Listerial sepsis | 1C1A.Z | Listeriosis, unspecified | |
| A32.8 | Other forms of listeriosis | 1C1A.Z | Listeriosis, unspecified | |
| A32.9 | Listeriosis, unspecified | 1C1A.Z | Listeriosis, unspecified | |
| A33 | Tetanus neonatorum | 1C15 | Tetanus neonatorum | |
| A34 | Obstetrical tetanus | 1C14 | Obstetrical tetanus | |
| A35 | Other tetanus | 1C13 | Tetanus | |
| A36 | Diphtheria | 1C17.Z | Diphtheria, unspecified | |
| A36.0 | Pharyngeal diphtheria | 1C17.0Z | Pharyngeal or tonsillar diphtheria, unspecified | |
| A36.1 | Nasopharyngeal diphtheria | 1C17.1 | Nasal diphtheria | |
| A36.2 | Laryngeal diphtheria | 1C17.2 | Laryngeal diphtheria | |
| A36.3 | Cutaneous diphtheria | 1C17.3 | Cutaneous diphtheria | |
| A36.8 | Other diphtheria | 1C17.Z/GB52 | Diphtheria, unspecified / Acute tubular necrosis | |
| A36.9 | Diphtheria, unspecified | 1C17.Z | Diphtheria, unspecified | |
| A37 | Whooping cough | 1C12.Z | Whooping cough, unspecified | |
| A37.0 | Whooping cough due to Bordetella pertussis | 1C12.0 | Whooping cough due to Bordetella pertussis | |
| A37.1 | Whooping cough due to Bordetella parapertussis | 1C12.1 | Whooping cough due to Bordetella parapertussis | |
| A37.8 | Whooping cough due to other Bordetella species | 1C12.Z | Whooping cough, unspecified | |
| A37.9 | Whooping cough, unspecified | 1C12.Z | Whooping cough, unspecified | |
| A38 | Scarlet fever | 1B50 | Scarlet fever | |
| A39 | Meningococcal infection | 1C1C.Z | Meningococcal disease, unspecified | |
| A39.0 | Meningococcal meningitis | 1C1C.0 | Meningococcal meningitis | |
| A39.1 | Waterhouse-Friderichsen syndrome | 1C1C.1 | Waterhouse-Friderichsen syndrome | |
| A39.2 | Acute meningococcaemia | 1C1C.20 | Acute meningococcaemia | |
| A39.3 | Chronic meningococcaemia | 1C1C.2Z | Meningococcaemia, unspecified | |
| A39.4 | Meningococcaemia, unspecified | 1C1C.2Z | Meningococcaemia, unspecified | |
| A39.5 | Meningococcal heart disease | 1C1C.Z | Meningococcal disease, unspecified | |
| A39.8 | Other meningococcal infections | 1C1C.Z | Meningococcal disease, unspecified | |
| A39.8 | Other meningococcal infections | 1D00.0 | Bacterial encephalitis | |
| A39.9 | Meningococcal infection, unspecified | 1C1C.Z | Meningococcal disease, unspecified | |
| A40 | Streptococcal sepsis | 1G40 | Sepsis without septic shock | |
| A40.0 | Sepsis due to streptococcus, group A | 1C41&XN6LP | Bacterial infection of unspecified site / Streptococcus, group A | |
| A40.1 | Sepsis due to streptococcus, group B | 1C41&XN2M1 | Bacterial infection of unspecified site / Streptococcus, group B | |
| A40.2 | Sepsis due to streptococcus, group D and enterococcus | 1G40 | Sepsis without septic shock | |
| A40.3 | Sepsis due to Streptococcus pneumoniae | 1C41&XN3PW | Bacterial infection of unspecified site / Streptococcus pneumoniae | |
| A40.8 | Other streptococcal sepsis | 1G40 | Sepsis without septic shock | |
| A40.9 | Streptococcal sepsis, unspecified | 1G40 | Sepsis without septic shock | |
| A41 | Other sepsis | 1G40 | Sepsis without septic shock | |
| A41.0 | Sepsis due to Staphylococcus aureus | 1C41&XN6BM | Bacterial infection of unspecified site / Staphylococcus aureus | |
| A41.1 | Sepsis due to other specified staphylococcus | 1G40 | Sepsis without septic shock | |
| A41.2 | Sepsis due to unspecified staphylococcus | 1G40 | Sepsis without septic shock | |
| A41.3 | Sepsis due to Haemophilus influenzae | 1C41&XN1P6 | Bacterial infection of unspecified site / Haemophilus influenzae | |
| A41.4 | Sepsis due to anaerobes | 1C41 | Bacterial infection of unspecified site | |
| A41.5 | Sepsis due to other Gram-negative organisms | 1G40 | Sepsis without septic shock | |
| A41.8 | Other specified sepsis | 1G40 | Sepsis without septic shock | |
| A41.9 | Sepsis, unspecified | 1G40 | Sepsis without septic shock | |
| A42 | Actinomycosis | 1C10.Z | Actinomycosis, unspecified | |
| A42.0 | Pulmonary actinomycosis | 1C10.0 | Pulmonary actinomycosis | |
| A42.1 | Abdominal actinomycosis | 1C10.1 | Abdominal actinomycosis | |
| A42.2 | Cervicofacial actinomycosis | 1C10.2 | Cervicofacial actinomycosis | |
| A42.7 | Actinomycotic sepsis | 1C10.Z | Actinomycosis, unspecified | |
| A42.8 | Other forms of actinomycosis | 1C10.Z | Actinomycosis, unspecified | |
| A42.9 | Actinomycosis, unspecified | 1C10.Z | Actinomycosis, unspecified | |
| A43 | Nocardiosis | 1C1B.Z | Nocardiosis, unspecified | |
| A43.0 | Pulmonary nocardiosis | 1C1B.0 | Pulmonary nocardiosis | |
| A43.1 | Cutaneous nocardiosis | 1C1B.1 | Cutaneous nocardiosis | |
| A43.8 | Other forms of nocardiosis | 1C1B.Z | Nocardiosis, unspecified | |
| A43.9 | Nocardiosis, unspecified | 1C1B.Z | Nocardiosis, unspecified | |
| A44 | Bartonellosis | 1C11 | Bartonellosis | |
| A44.0 | Systemic bartonellosis | 1C11.00 | Oroya fever | |
| A44.1 | Cutaneous and mucocutaneous bartonellosis | 1C11.01 | Verruga peruana | |
| A44.8 | Other forms of bartonellosis | 1C11 | Bartonellosis | |
| A44.9 | Bartonellosis, unspecified | 1C11 | Bartonellosis | |
| A46 | Erysipelas | 1B70.0 | Erysipelas | |
| A46 | Erysipelas | 1B70.Z | Bacterial cellulitis or lymphangitis due to unspecified bacterium | |
| A48 | Other bacterial diseases, not elsewhere classified | 1C4Z | Unspecified bacterial disease | |
| A48.0 | Gas gangrene | 1C16 | Gas gangrene | |
| A48.1 | Legionnaires disease | 1C19 | Legionellosis | |
| A48.2 | Nonpneumonic Legionnaires disease [Pontiac fever] | 1C19.0 | Nonpneumonic Legionnaires' disease | |
| A48.3 | Toxic shock syndrome | 1C45.Z | Toxic shock syndrome without specified infectious agent | |
| A48.4 | Brazilian purpuric fever | 1C18 | Brazilian purpuric fever | |
| A48.8 | Other specified bacterial diseases | 1C4Z | Unspecified bacterial disease | |
| A49 | Bacterial infection of unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.0 | Staphylococcal infection, unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.1 | Streptococcal and enterococcal infection, unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.2 | Haemophilus influenzae infection, unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.3 | Mycoplasma infection, unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.8 | Other bacterial infections of unspecified site | 1C41 | Bacterial infection of unspecified site | |
| A49.9 | Bacterial infection, unspecified | 1C41 | Bacterial infection of unspecified site | |
| A49.9 | Bacterial infection, unspecified | MA15.0 | Bacteraemia | |
| A50-A64 | Infections with a predominantly sexual mode of transmission | 1A9Z | Predominantly sexually transmitted infections, unspecified | |
| A50 | Congenital syphilis | 1A60.Z | Congenital syphilis, unspecified | |
| A50.0 | Early congenital syphilis, symptomatic | 1A60.0 | Early congenital syphilis, symptomatic | |
| A50.1 | Early congenital syphilis, latent | 1A60.1 | Early congenital syphilis, latent | |
| A50.2 | Early congenital syphilis, unspecified | 1A60.Z | Congenital syphilis, unspecified | |
| A50.3 | Late congenital syphilitic oculopathy | 1A60.2 | Late congenital syphilitic oculopathy | |
| A50.4 | Late congenital neurosyphilis [juvenile neurosyphilis] | 1A60.3 | Late congenital neurosyphilis | |
| A50.5 | Other late congenital syphilis, symptomatic | 1A60.3/8C03.1 | Late congenital neurosyphilis / Polyneuropathy due to infectious diseases | |
| A50.5 | Other late congenital syphilis, symptomatic | 1A60.4 | Other late congenital syphilis, symptomatic | |
| A50.6 | Late congenital syphilis, latent | 1A60.5 | Late congenital syphilis, latent | |
| A50.7 | Late congenital syphilis, unspecified | 1A60.Z | Congenital syphilis, unspecified | |
| A50.9 | Congenital syphilis, unspecified | 1A60.Z | Congenital syphilis, unspecified | |
| A51 | Early syphilis | 1A61.Z | Early syphilis, unspecified | |
| A51.0 | Primary genital syphilis | 1A61.0 | Primary genital syphilis | |
| A51.1 | Primary anal syphilis | 1A61.1 | Primary anal syphilis | |
| A51.2 | Primary syphilis of other sites | 1A61.2 | Primary syphilis of other sites | |
| A51.3 | Secondary syphilis of skin and mucous membranes | 1A61.3 | Secondary syphilis of skin or mucous membranes | |
| A51.4 | Other secondary syphilis | 1A61.4 | Secondary syphilis of other sites | |
| A51.5 | Early syphilis, latent | 1A61.5 | Latent early syphilis | |
| A51.9 | Early syphilis, unspecified | 1A61.Z | Early syphilis, unspecified | |
| A52 | Late syphilis | 1A62.Z | Late syphilis, unspecified | |
| A52.0 | Cardiovascular syphilis | 1A62.1 | Cardiovascular late syphilis | |
| A52.1 | Symptomatic neurosyphilis | 1A62.01 | Symptomatic late neurosyphilis | |
| A52.2 | Asymptomatic neurosyphilis | 1A62.00 | Asymptomatic neurosyphilis | |
| A52.3 | Neurosyphilis, unspecified | 1A62.0Z | Neurosyphilis, unspecified | |
| A52.7 | Other symptomatic late syphilis | 1A62.21 | Late syphilis involving the musculoskeletal system | |
| A52.7 | Other symptomatic late syphilis | 1A62.2Z | Symptomatic late syphilis of unspecified site | |
| A52.8 | Late syphilis, latent | 1A62.Z | Late syphilis, unspecified | |
| A52.9 | Late syphilis, unspecified | 1A62.Z | Late syphilis, unspecified | |
| A53 | Other and unspecified syphilis | 1A6Z | Syphilis, unspecified | |
| A53.0 | Latent syphilis, unspecified as early or late | 1A63 | Latent syphilis, unspecified as early or late | |
| A53.9 | Syphilis, unspecified | 1A6Z | Syphilis, unspecified | |
| A54 | Gonococcal infection | 1A7Z | Gonococcal infection, unspecified | |
| A54.0 | Gonococcal infection of lower genitourinary tract without periurethral or accessory gland abscess | 1A70.0Z | Gonococcal infection of lower genitourinary tract without periurethral or accessory gland abscess, unspecified | |
| A54.1 | Gonococcal infection of lower genitourinary tract with periurethral and accessory gland abscess | 1A70.1 | Gonococcal infection of lower genitourinary tract with periurethral or accessory gland abscess | |
| A54.2 | Gonococcal pelviperitonitis and other gonococcal genitourinary infections | 1A71 | Gonococcal pelviperitonitis | |
| A54.3 | Gonococcal infection of eye | 1A72.4 | Gonococcal infection of eye | |
| A54.4 | Gonococcal infection of musculoskeletal system | 1A72.0 | Gonococcal infection of musculoskeletal system | |
| A54.4 | Gonococcal infection of musculoskeletal system | 1A73 | Disseminated gonococcal infection | |
| A54.5 | Gonococcal pharyngitis | 1A72.3 | Gonococcal pharyngitis | |
| A54.6 | Gonococcal infection of anus and rectum | 1A72.2 | Gonococcal infection of anus | |
| A54.6 | Gonococcal infection of anus and rectum | 1A72.1 | Gonococcal infection of rectum | |
| A54.8 | Other gonococcal infections | 1A73 | Disseminated gonococcal infection | |
| A54.8 | Other gonococcal infections | 1A71&XN59Y | Gonococcal pelviperitonitis / Neisseria gonorrhoeae | |
| A54.9 | Gonococcal infection, unspecified | 1A7Z | Gonococcal infection, unspecified | |
| A55 | Chlamydial lymphogranuloma (venereum) | 1A80 | Chlamydial lymphogranuloma | |
| A56 | Other sexually transmitted chlamydial diseases | 1A81.Z | Non-ulcerative sexually transmitted chlamydial infection of unspecified site | |
| A56.0 | Chlamydial infection of lower genitourinary tract | 1A81.0 | Chlamydial infection of lower genitourinary tract | |
| A56.1 | Chlamydial infection of pelviperitoneum and other genitourinary organs | 1A81.1 | Chlamydial infection of internal reproductive organs | |
| A56.2 | Chlamydial infection of genitourinary tract, unspecified | 1A81.0 | Chlamydial infection of lower genitourinary tract | |
| A56.3 | Chlamydial infection of anus and rectum | 1A81.Z | Non-ulcerative sexually transmitted chlamydial infection of unspecified site | |
| A56.4 | Chlamydial infection of pharynx | 1A81.Z | Non-ulcerative sexually transmitted chlamydial infection of unspecified site | |
| A56.8 | Sexually transmitted chlamydial infection of other sites | 1A81.1 | Chlamydial infection of internal reproductive organs | |
| A57 | Chancroid | 1A90 | Chancroid | |
| A58 | Granuloma inguinale | 1A91 | Granuloma inguinale | |
| A59 | Trichomoniasis | 1A92 | Trichomoniasis | |
| A59.0 | Urogenital trichomoniasis | 1A92 | Trichomoniasis | |
| A59.8 | Trichomoniasis of other sites | 1A92 | Trichomoniasis | |
| A59.9 | Trichomoniasis, unspecified | 1A92 | Trichomoniasis | |
| A60 | Anogenital herpesviral [herpes simplex] infection | 1A94.Z | Anogenital herpes simplex infection without further specification | |
| A60.0 | Herpesviral infection of genitalia and urogenital tract | 1A94.0 | Herpes simplex infection of genitalia or urogenital tract | |
| A60.1 | Herpesviral infection of perianal skin and rectum | 1A94.1 | Herpes simplex infection of perianal skin or rectum | |
| A60.9 | Anogenital herpesviral infection, unspecified | 1A94.Z | Anogenital herpes simplex infection without further specification | |
| A63 | Other predominantly sexually transmitted diseases, not elsewhere classified | 1A9Z | Predominantly sexually transmitted infections, unspecified | |
| A63.0 | Anogenital (venereal) warts | 1A95 | Anogenital warts | |
| A63.8 | Other specified predominantly sexually transmitted diseases | 1A9Z | Predominantly sexually transmitted infections, unspecified | |
| A63.8 | Other specified predominantly sexually transmitted diseases | 1A93 | Sexually transmissible infestations | |
| A64 | Unspecified sexually transmitted disease | 1A9Z | Predominantly sexually transmitted infections, unspecified | |
| A65-A69 | Other spirochaetal diseases | 1C4Z | Unspecified bacterial disease | |
| A65 | Nonvenereal syphilis | 1C1F | Endemic non-venereal syphilis | |
| A66 | Yaws | 1C1D | Yaws | |
| A66.0 | Initial lesions of yaws | 1C1D.0 | Primary yaws | |
| A66.1 | Multiple papillomata and wet crab yaws | 1C1D.1 | Secondary yaws | |
| A66.2 | Other early skin lesions of yaws | 1C1D.1 | Secondary yaws | |
| A66.3 | Hyperkeratosis of yaws | 1C1D.1 | Secondary yaws | |
| A66.4 | Gummata and ulcers of yaws | 1C1D.2 | Tertiary yaws | |
| A66.5 | Gangosa | 1C1D.2 | Tertiary yaws | |
| A66.6 | Bone and joint lesions of yaws | 1C1D.1 | Secondary yaws | |
| A66.7 | Other manifestations of yaws | 1C1D.1 | Secondary yaws | |
| A66.8 | Latent yaws | 1C1D.3 | Latent yaws | |
| A66.9 | Yaws, unspecified | 1C1D | Yaws | |
| A67 | Pinta [carate] | 1C1E | Pinta | |
| A67.0 | Primary lesions of pinta | 1C1E.0 | Primary lesions of pinta | |
| A67.1 | Intermediate lesions of pinta | 1C1E.1 | Intermediate lesions of pinta | |
| A67.2 | Late lesions of pinta | 1C1E.2 | Late lesions of pinta | |
| A67.3 | Mixed lesions of pinta | 1C1E.3 | Mixed lesions of pinta | |
| A67.9 | Pinta, unspecified | 1C1E | Pinta | |
| A68 | Relapsing fevers | 1C1J | Relapsing fever | |
| A68.0 | Louse-borne relapsing fever | 1C1J.1 | Louse-borne relapsing fever | |
| A68.1 | Tick-borne relapsing fever | 1C1J.0 | Tick-borne relapsing fever | |
| A68.9 | Relapsing fever, unspecified | 1C1J | Relapsing fever | |
| A69 | Other spirochaetal infections | 1C4Z | Unspecified bacterial disease | |
| A69.0 | Necrotizing ulcerative stomatitis | 1C1H.Z | Necrotising ulcerative gingivitis, unspecified | |
| A69.1 | Other Vincent infections | 1C4Z | Unspecified bacterial disease | |
| A69.2 | Lyme disease | 1C1G.1Z | Disseminated Lyme borreliosis, unspecified | |
| A69.2 | Lyme disease | 1C1G | Lyme borreliosis | |
| A69.2 | Lyme disease | 1C1G.13 | Lyme arthritis | |
| A69.8 | Other specified spirochaetal infections | 1C4Z | Unspecified bacterial disease | |
| A69.9 | Spirochaetal infection, unspecified | 1C4Z | Unspecified bacterial disease | |
| A70-A74 | Other diseases caused by chlamydiae | 1C2Z | Diseases due to chlamydiae, unspecified | |
| A70 | Chlamydia psittaci infection | 1C22 | Infections due to Chlamydia psittaci | |
| A71 | Trachoma | 1C23.Z | Trachoma, unspecified | |
| A71.0 | Initial stage of trachoma | 1C23.0 | Initial stage of trachoma | |
| A71.1 | Active stage of trachoma | 1C23.1 | Active stage of trachoma | |
| A71.9 | Trachoma, unspecified | 1C23.Z | Trachoma, unspecified | |
| A74 | Other diseases caused by chlamydiae | 1C2Z | Diseases due to chlamydiae, unspecified | |
| A74.0 | Chlamydial conjunctivitis | 1C20 | Chlamydial conjunctivitis | |
| A74.8 | Other chlamydial diseases | 1C21 | Chlamydial peritonitis | |
| A74.9 | Chlamydial infection, unspecified | 1C2Z | Diseases due to chlamydiae, unspecified | |
| A75-A79 | Rickettsioses | 1C3Z | Rickettsioses, unspecified | |
| A75 | Typhus fever | 1C30.Z | Typhus fever, unspecified | |
| A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | 1C30.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| A75.1 | Recrudescent typhus [Brill disease] | 1C30.1 | Recrudescent typhus | |
| A75.2 | Typhus fever due to Rickettsia typhi | 1C30.2 | Typhus fever due to Rickettsia typhi | |
| A75.3 | Typhus fever due to Rickettsia tsutsugamushi | 1C30.3 | Typhus fever due to Orientia tsutsugamushi | |
| A75.9 | Typhus fever, unspecified | 1C30.Z | Typhus fever, unspecified | |
| A77 | Spotted fever [tick-borne rickettsioses] | 1C31.Z | Spotted fever, unspecified | |
| A77.0 | Spotted fever due to Rickettsia rickettsii | 1C31.0 | Spotted fever due to Rickettsia rickettsii | |
| A77.1 | Spotted fever due to Rickettsia conorii | 1C31.1 | Spotted fever due to Rickettsia conorii | |
| A77.2 | Spotted fever due to Rickettsia sibirica | 1C31.2 | Spotted fever due to Rickettsia sibirica | |
| A77.3 | Spotted fever due to Rickettsia australis | 1C31.3 | Spotted fever due to Rickettsia australis | |
| A77.8 | Other spotted fevers | 1C3Z | Rickettsioses, unspecified | |
| A77.9 | Spotted fever, unspecified | 1C31.Z | Spotted fever, unspecified | |
| A78 | Q fever | 1C33 | Q fever | |
| A79 | Other rickettsioses | 1C3Z | Rickettsioses, unspecified | |
| A79.0 | Trench fever | 1C11.1 | Trench fever | |
| A79.1 | Rickettsialpox due to Rickettsia akari | 1C32 | Rickettsialpox | |
| A79.8 | Other specified rickettsioses | 1C3Z | Rickettsioses, unspecified | |
| A79.9 | Rickettsiosis, unspecified | 1C3Z | Rickettsioses, unspecified | |
| A80-A89 | Viral infections of the central nervous system | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A80 | Acute poliomyelitis | 1C81 | Acute poliomyelitis | |
| A80.0 | Acute paralytic poliomyelitis, vaccine-associated | 1C81 | Acute poliomyelitis | |
| A80.1 | Acute paralytic poliomyelitis, wild virus, imported | 1C81 | Acute poliomyelitis | |
| A80.2 | Acute paralytic poliomyelitis, wild virus, indigenous | 1C81 | Acute poliomyelitis | |
| A80.3 | Acute paralytic poliomyelitis, other and unspecified | 1C81 | Acute poliomyelitis | |
| A80.4 | Acute nonparalytic poliomyelitis | 1C81 | Acute poliomyelitis | |
| A80.9 | Acute poliomyelitis, unspecified | 1C81 | Acute poliomyelitis | |
| A81 | Atypical virus infections of central nervous system | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A81.0 | Creutzfeldt-Jakob disease | 8E02.0 | Genetic Creutzfeldt-Jakob disease | |
| A81.1 | Subacute sclerosing panencephalitis | 8A45.01 | Subacute sclerosing panencephalitis | |
| A81.2 | Progressive multifocal leukoencephalopathy | 8A45.02 | Progressive multifocal leukoencephalopathy | |
| A81.8 | Other atypical virus infections of central nervous system | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A81.8 | Other atypical virus infections of central nervous system | 8E01.1 | Kuru | |
| A81.9 | Atypical virus infection of central nervous system, unspecified | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A81.9 | Atypical virus infection of central nervous system, unspecified | 8E02.3 | Other genetic prion diseases | |
| A81.9 | Atypical virus infection of central nervous system, unspecified | 8.00E+03 | Variably protease sensitive prionopathy | |
| A81.9 | Atypical virus infection of central nervous system, unspecified | 8E0Z | Human prion diseases, unspecified | |
| A82 | Rabies | 1C82 | Rabies | |
| A82.0 | Sylvatic rabies | 1C82 | Rabies | |
| A82.1 | Urban rabies | 1C82 | Rabies | |
| A82.9 | Rabies, unspecified | 1C82 | Rabies | |
| A83 | Mosquito-borne viral encephalitis | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A83.0 | Japanese encephalitis | 1C85 | Japanese encephalitis | |
| A83.1 | Western equine encephalitis | 1C83 | Western equine encephalitis | |
| A83.2 | Eastern equine encephalitis | 1C84 | Eastern equine encephalitis | |
| A83.3 | St Louis encephalitis | 1C86 | St Louis encephalitis | |
| A83.4 | Australian encephalitis | 1C88 | Murray Valley encephalitis | |
| A83.5 | California encephalitis | 1C8D | La Crosse encephalitis | |
| A83.5 | California encephalitis | 1C8B | California encephalitis | |
| A83.6 | Rocio virus disease | 1C87 | Rocio viral encephalitis | |
| A83.8 | Other mosquito-borne viral encephalitis | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A83.9 | Mosquito-borne viral encephalitis, unspecified | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A84 | Tick-borne viral encephalitis | 1C8A | Central European tick-borne encephalitis | |
| A84 | Tick-borne viral encephalitis | 1C89 | Far Eastern tick-borne encephalitis | |
| A84 | Tick-borne viral encephalitis | 1C80 | Viral encephalitis not elsewhere classified | |
| A84.0 | Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis] | 1C89 | Far Eastern tick-borne encephalitis | |
| A84.1 | Central European tick-borne encephalitis | 1C8A | Central European tick-borne encephalitis | |
| A84.8 | Other tick-borne viral encephalitis | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A84.9 | Tick-borne viral encephalitis, unspecified | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A85 | Other viral encephalitis, not elsewhere classified | 1C80 | Viral encephalitis not elsewhere classified | |
| A85.0 | Enteroviral encephalitis | 1C80 | Viral encephalitis not elsewhere classified | |
| A85.1 | Adenoviral encephalitis | 1C80 | Viral encephalitis not elsewhere classified | |
| A85.2 | Arthropod-borne viral encephalitis, unspecified | 1C80 | Viral encephalitis not elsewhere classified | |
| A85.8 | Other specified viral encephalitis | 1C80 | Viral encephalitis not elsewhere classified | |
| A86 | Unspecified viral encephalitis | 1C80 | Viral encephalitis not elsewhere classified | |
| A87 | Viral meningitis | 1C8E.Z | Viral meningitis not elsewhere classified, unspecified | |
| A87.0 | Enteroviral meningitis | 1C8E.1 | Enteroviral meningitis | |
| A87.1 | Adenoviral meningitis | 1C8E.2 | Meningitis due to adenovirus | |
| A87.2 | Lymphocytic choriomeningitis | 1C8F | Lymphocytic choriomeningitis | |
| A87.8 | Other viral meningitis | 1C8E.Z | Viral meningitis not elsewhere classified, unspecified | |
| A87.9 | Viral meningitis, unspecified | 1C8E.Z | Viral meningitis not elsewhere classified, unspecified | |
| A88 | Other viral infections of central nervous system, not elsewhere classified | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A88.0 | Enteroviral exanthematous fever [Boston exanthem] | 1F05.2 | Enteroviral exanthematous fever | |
| A88.1 | Epidemic vertigo | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A88.8 | Other specified viral infections of central nervous system | 1C8Z | Viral infections of the central nervous system, unspecified | |
| A89 | Unspecified viral infection of central nervous system | 1C8Z | Viral infections of the central nervous system, unspecified |