| Header | Description |
| A00* | Cholera |
| A01* | Typhoid and paratyphoid fevers |
| A01.0* | Typhoid fever |
| A02* | Other salmonella infections |
| A02.2* | Localized salmonella infections |
| A03* | Shigellosis |
| A04* | Other bacterial intestinal infections |
| A04.7* | Enterocolitis due to Clostridium difficile |
| A05* | Other bacterial foodborne intoxications, not elsewhere classified |
| A06* | Amebiasis |
| A06.8* | Amebic infection of other sites |
| A07* | Other protozoal intestinal diseases |
| A08* | Viral and other specified intestinal infections |
| A08.1* | Acute gastroenteropathy due to Norwalk agent and other small round viruses |
| A08.3* | Other viral enteritis |
| A15* | Respiratory tuberculosis |
| A17* | Tuberculosis of nervous system |
| A17.8* | Other tuberculosis of nervous system |
| A18* | Tuberculosis of other organs |
| A18.0* | Tuberculosis of bones and joints |
| A18.1* | Tuberculosis of genitourinary system |
| A18.3* | Tuberculosis of intestines, peritoneum and mesenteric glands |
| A18.5* | Tuberculosis of eye |
| A18.8* | Tuberculosis of other specified organs |
| A19* | Miliary tuberculosis |
| A20* | Plague |
| A21* | Tularemia |
| A22* | Anthrax |
| A23* | Brucellosis |
| A24* | Glanders and melioidosis |
| A25* | Rat-bite fevers |
| A26* | Erysipeloid |
| A27* | Leptospirosis |
| A27.8* | Other forms of leptospirosis |
| A28* | Other zoonotic bacterial diseases, not elsewhere classified |
| A30* | Leprosy [Hansen's disease] |
| A31* | Infection due to other mycobacteria |
| A32* | Listeriosis |
| A32.1* | Listerial meningitis and meningoencephalitis |
| A32.8* | Other forms of listeriosis |
| A36* | Diphtheria |
| A36.8* | Other diphtheria |
| A37* | Whooping cough |
| A37.0* | Whooping cough due to Bordetella pertussis |
| A37.1* | Whooping cough due to Bordetella parapertussis |
| A37.8* | Whooping cough due to other Bordetella species |
| A37.9* | Whooping cough, unspecified species |
| A38* | Scarlet fever |
| A39* | Meningococcal infection |
| A39.5* | Meningococcal heart disease |
| A39.8* | Other meningococcal infections |
| A40* | Streptococcal sepsis |
| A41* | Other sepsis |
| A41.0* | Sepsis due to Staphylococcus aureus |
| A41.5* | Sepsis due to other Gram-negative organisms |
| A41.8* | Other specified sepsis |
| A42* | Actinomycosis |
| A42.8* | Other forms of actinomycosis |
| A43* | Nocardiosis |
| A44* | Bartonellosis |
| A48* | Other bacterial diseases, not elsewhere classified |
| A48.5* | Other specified botulism |
| A49* | Bacterial infection of unspecified site |
| A49.0* | Staphylococcal infection, unspecified site |
| A50* | Congenital syphilis |
| A50.0* | Early congenital syphilis, symptomatic |
| A50.3* | Late congenital syphilitic oculopathy |
| A50.4* | Late congenital neurosyphilis [juvenile neurosyphilis] |
| A50.5* | Other late congenital syphilis, symptomatic |
| A51* | Early syphilis |
| A51.3* | Secondary syphilis of skin and mucous membranes |
| A51.4* | Other secondary syphilis |
| A52* | Late syphilis |
| A52.0* | Cardiovascular and cerebrovascular syphilis |
| A52.1* | Symptomatic neurosyphilis |
| A52.7* | Other symptomatic late syphilis |
| A53* | Other and unspecified syphilis |
| A54* | Gonococcal infection |
| A54.0* | Gonococcal infection of lower genitourinary tract without periurethral or accessory gland abscess |
| A54.2* | Gonococcal pelviperitonitis and other gonococcal genitourinary infection |
| A54.3* | Gonococcal infection of eye |
| A54.4* | Gonococcal infection of musculoskeletal system |
| A54.8* | Other gonococcal infections |
| A56* | Other sexually transmitted chlamydial diseases |
| A56.0* | Chlamydial infection of lower genitourinary tract |
| A56.1* | Chlamydial infection of pelviperitoneum and other genitourinary organs |
| A59* | Trichomoniasis |
| A59.0* | Urogenital trichomoniasis |
| A60* | Anogenital herpesviral [herpes simplex] infections |
| A60.0* | Herpesviral infection of genitalia and urogenital tract |
| A63* | Other predominantly sexually transmitted diseases, not elsewhere classified |
| A66* | Yaws |
| A67* | Pinta [carate] |
| A68* | Relapsing fevers |
| A69* | Other spirochetal infections |
| A69.2* | Lyme disease |
| A71* | Trachoma |
| A74* | Other diseases caused by chlamydiae |
| A74.8* | Other chlamydial diseases |
| A75* | Typhus fever |
| A77* | Spotted fever [tick-borne rickettsioses] |
| A77.4* | Ehrlichiosis |
| A79* | Other rickettsioses |
| A79.8* | Other specified rickettsioses |
| A80* | Acute poliomyelitis |
| A80.3* | Acute paralytic poliomyelitis, other and unspecified |
| A81* | Atypical virus infections of central nervous system |
| A81.0* | Creutzfeldt-Jakob disease |
| A81.8* | Other atypical virus infections of central nervous system |
| A82* | Rabies |
| A83* | Mosquito-borne viral encephalitis |
| A84* | Tick-borne viral encephalitis |
| A85* | Other viral encephalitis, not elsewhere classified |
| A87* | Viral meningitis |
| A88* | Other viral infections of central nervous system, not elsewhere classified |
| A92* | Other mosquito-borne viral fevers |
| A92.3* | West Nile virus infection |
| A93* | Other arthropod-borne viral fevers, not elsewhere classified |
| A95* | Yellow fever |
| A96* | Arenaviral hemorrhagic fever |
| A98* | Other viral hemorrhagic fevers, not elsewhere classified |
| B00* | Herpesviral [herpes simplex] infections |
| B00.5* | Herpesviral ocular disease |
| B00.8* | Other forms of herpesviral infections |
| B01* | Varicella [chickenpox] |
| B01.1* | Varicella encephalitis, myelitis and encephalomyelitis |
| B01.8* | Varicella with other complications |
| B02* | Zoster [herpes zoster] |
| B02.2* | Zoster with other nervous system involvement |
| B02.3* | Zoster ocular disease |
| B05* | Measles |
| B05.8* | Measles with other complications |
| B06* | Rubella [German measles] |
| B06.0* | Rubella with neurological complications |
| B06.8* | Rubella with other complications |
| B07* | Viral warts |
| B08* | Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified |
| B08.0* | Other orthopoxvirus infections |
| B08.01* | Cowpox and vaccinia not from vaccine |
| B08.2* | Exanthema subitum [sixth disease] |
| B08.6* | Parapoxvirus infections |
| B08.7* | Yatapoxvirus infections |
| B10* | Other human herpesviruses |
| B10.0* | Other human herpesvirus encephalitis |
| B10.8* | Other human herpesvirus infection |
| B15* | Acute hepatitis A |
| B16* | Acute hepatitis B |
| B17* | Other acute viral hepatitis |
| B17.1* | Acute hepatitis C |
| B18* | Chronic viral hepatitis |
| B19* | Unspecified viral hepatitis |
| B19.1* | Unspecified viral hepatitis B |
| B19.2* | Unspecified viral hepatitis C |
| B25* | Cytomegaloviral disease |
| B26* | Mumps |
| B26.8* | Mumps with other complications |
| B27* | Infectious mononucleosis |
| B27.0* | Gammaherpesviral mononucleosis |
| B27.1* | Cytomegaloviral mononucleosis |
| B27.8* | Other infectious mononucleosis |
| B27.9* | Infectious mononucleosis, unspecified |
| B30* | Viral conjunctivitis |
| B33* | Other viral diseases, not elsewhere classified |
| B33.2* | Viral carditis |
| B34* | Viral infection of unspecified site |
| B35* | Dermatophytosis |
| B36* | Other superficial mycoses |
| B37* | Candidiasis |
| B37.4* | Candidiasis of other urogenital sites |
| B37.8* | Candidiasis of other sites |
| B38* | Coccidioidomycosis |
| B38.8* | Other forms of coccidioidomycosis |
| B39* | Histoplasmosis |
| B40* | Blastomycosis |
| B40.8* | Other forms of blastomycosis |
| B41* | Paracoccidioidomycosis |
| B42* | Sporotrichosis |
| B42.8* | Other forms of sporotrichosis |
| B43* | Chromomycosis and pheomycotic abscess |
| B44* | Aspergillosis |
| B44.8* | Other forms of aspergillosis |
| B45* | Cryptococcosis |
| B46* | Zygomycosis |
| B47* | Mycetoma |
| B48* | Other mycoses, not elsewhere classified |
| B50* | Plasmodium falciparum malaria |
| B51* | Plasmodium vivax malaria |
| B52* | Plasmodium malariae malaria |
| B53* | Other specified malaria |
| B55* | Leishmaniasis |
| B56* | African trypanosomiasis |
| B57* | Chagas' disease |
| B57.3* | Chagas' disease (chronic) with digestive system involvement |
| B57.4* | Chagas' disease (chronic) with nervous system involvement |
| B58* | Toxoplasmosis |
| B58.0* | Toxoplasma oculopathy |
| B58.8* | Toxoplasmosis with other organ involvement |
| B60* | Other protozoal diseases, not elsewhere classified |
| B60.1* | Acanthamebiasis |
| B65* | Schistosomiasis [bilharziasis] |
| B66* | Other fluke infections |
| B67* | Echinococcosis |
| B67.3* | Echinococcus granulosus infection, other and multiple sites |
| B67.6* | Echinococcus multilocularis infection, other and multiple sites |
| B67.9* | Echinococcosis, other and unspecified |
| B68* | Taeniasis |
| B69* | Cysticercosis |
| B69.8* | Cysticercosis of other sites |
| B70* | Diphyllobothriasis and sparganosis |
| B71* | Other cestode infections |
| B73* | Onchocerciasis |
| B73.0* | Onchocerciasis with eye disease |
| B74* | Filariasis |
| B76* | Hookworm diseases |
| B77* | Ascariasis |
| B77.8* | Ascariasis with other complications |
| B78* | Strongyloidiasis |
| B81* | Other intestinal helminthiases, not elsewhere classified |
| B82* | Unspecified intestinal parasitism |
| B83* | Other helminthiases |
| B85* | Pediculosis and phthiriasis |
| B87* | Myiasis |
| B87.8* | Myiasis of other sites |
| B88* | Other infestations |
| B90* | Sequelae of tuberculosis |
| B94* | Sequelae of other and unspecified infectious and parasitic diseases |
| B95* | Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified elsewhere |
| B95.6* | Staphylococcus aureus as the cause of diseases classified elsewhere |
| B96* | Other bacterial agents as the cause of diseases classified elsewhere |
| B96.2* | Escherichia coli [E. coli ] as the cause of diseases classified elsewhere |
| B96.8* | Other specified bacterial agents as the cause of diseases classified elsewhere |
| B97* | Viral agents as the cause of diseases classified elsewhere |
| B97.1* | Enterovirus as the cause of diseases classified elsewhere |
| B97.2* | Coronavirus as the cause of diseases classified elsewhere |
| B97.3* | Retrovirus as the cause of diseases classified elsewhere |
| B97.8* | Other viral agents as the cause of diseases classified elsewhere |
| B99* | Other and unspecified infectious diseases |
