Certain infectious and parasitic diseases (A00–B99)

Includes: diseases generally recognized as communicable or transmissible Use additional code to identify resistance to antimicrobial drugs (Z16.-)
Excludes1: certain localized infections - see body system-related chapters
Excludes2: carrier or suspected carrier of infectious disease (Z22.-), infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-), infectious and parasitic diseases specific to the perinatal period (P35-P39), influenza and other acute respiratory infections (J00-J22).

• Intestinal infectious diseases (A00-A09)

  • Cholera (A00)
  • Typhoid and paratyphoid fevers (A01)
  • Other salmonella infections (A02)
  • Shigellosis (A03)
  • Other bacterial intestinal infections (A04)
  • Other bacterial foodborne intoxications, not elsewhere classified (A05)
  • Amebiasis (A06)
  • Other protozoal intestinal diseases (A07)
  • Viral and other specified intestinal infections (A08)
  • Infectious gastroenteritis and colitis, unspecified (A09)

• Tuberculosis (A15-A19)

  • Respiratory tuberculosis (A15)
  • Tuberculosis of nervous system (A17)
  • Tuberculosis of other organs (A18)
  • Miliary tuberculosis (A19)

• Certain zoonotic bacterial diseases (A20-A28)

  • Plague (A20)
  • Tularemia (A21)
  • Anthrax (A22)
  • Brucellosis (A23)
  • Glanders and melioidosis (A24)
  • Rat-bite fevers (A25)
  • Erysipeloid (A26)
  • Leptospirosis (A27)
  • Other zoonotic bacterial diseases, not elsewhere classified (A28)

• Other bacterial diseases (A30-A49)

  • Leprosy [Hansen's disease] (A30)
  • Infection due to other mycobacteria (A31)
  • Listeriosis (A32)
  • Tetanus neonatorum (A33)
  • Obstetrical tetanus (A34)
  • Other tetanus (A35)
  • Diphtheria (A36)
  • Whooping cough (A37)
  • Scarlet fever (A38)
  • Meningococcal infection (A39)
  • Streptococcal sepsis (A40)
  • Other sepsis (A41)
  • Actinomycosis (A42)
  • Nocardiosis (A43)
  • Bartonellosis (A44)
  • Erysipelas (A46)
  • Other bacterial diseases, not elsewhere classified (A48)
  • Bacterial infection of unspecified site (A49)

• Infections with a predominantly sexual mode of transmission (A50-A64)

  • Congenital syphilis (A50)
  • Early syphilis (A51)
  • Late syphilis (A52)
  • Other and unspecified syphilis (A53)
  • Gonococcal infection (A54)
  • Chlamydial lymphogranuloma (venereum) (A55)
  • Other sexually transmitted chlamydial diseases (A56)
  • Chancroid (A57)
  • Granuloma inguinale (A58)
  • Trichomoniasis (A59)
  • Anogenital herpesviral [herpes simplex] infections (A60)
  • Other predominantly sexually transmitted diseases, not elsewhere classified (A63)
  • Unspecified sexually transmitted disease (A64)

• Other spirochetal diseases (A65-A69)

  • Nonvenereal syphilis (A65)
  • Yaws (A66)
  • Pinta [carate] (A67)
  • Relapsing fevers (A68)
  • Other spirochetal infections (A69)

• Other diseases caused by chlamydiae (A70-A74)

  • Chlamydia psittaci infections (A70)
  • Trachoma (A71)
  • Other diseases caused by chlamydiae (A74)

• Rickettsioses (A75-A79)

  • Typhus fever (A75)
  • Spotted fever [tick-borne rickettsioses] (A77)
  • Q fever (A78)
  • Other rickettsioses (A79)

• Viral and prion infections of the central nervous system (A80-A89)

  • Acute poliomyelitis (A80)
  • Atypical virus infections of central nervous system (A81)
  • Rabies (A82)
  • Mosquito-borne viral encephalitis (A83)
  • Tick-borne viral encephalitis (A84)
  • Other viral encephalitis, not elsewhere classified (A85)
  • Unspecified viral encephalitis (A86)
  • Viral meningitis (A87)
  • Other viral infections of central nervous system, not elsewhere classified (A88)
  • Unspecified viral infection of central nervous system (A89)

• Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)

  • Dengue fever [classical dengue] (A90)
  • Dengue hemorrhagic fever (A91)
  • Other mosquito-borne viral fevers (A92)
  • Other arthropod-borne viral fevers, not elsewhere classified (A93)
  • Unspecified arthropod-borne viral fever (A94)
  • Yellow fever (A95)
  • Arenaviral hemorrhagic fever (A96)
  • Other viral hemorrhagic fevers, not elsewhere classified (A98)
  • Unspecified viral hemorrhagic fever (A99)

• Viral infections characterized by skin and mucous membrane lesions (B00-B09)

  • Herpesviral [herpes simplex] infections (B00)
  • Varicella [chickenpox] (B01)
  • Zoster [herpes zoster] (B02)
  • Smallpox (B03)
  • Monkeypox (B04)
  • Measles (B05)
  • Rubella [German measles] (B06)
  • Viral warts (B07)
  • Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified (B08)
  • Unspecified viral infection characterized by skin and mucous membrane lesions (B09)

• Other human herpesviruses (B10)

  • Other human herpesviruses (B10)

• Viral hepatitis (B15-B19)

  • Acute hepatitis A (B15)
  • Acute hepatitis B (B16)
  • Other acute viral hepatitis (B17)
  • Chronic viral hepatitis (B18)
  • Unspecified viral hepatitis (B19)

• Human immunodeficiency virus [HIV] disease (B20)

  • Human immunodeficiency virus [HIV] disease (B20)

• Other viral diseases (B25-B34)

  • Cytomegaloviral disease (B25)
  • Mumps (B26)
  • Infectious mononucleosis (B27)
  • Viral conjunctivitis (B30)
  • Other viral diseases, not elsewhere classified (B33)
  • Viral infection of unspecified site (B34)

• Mycoses (B35-B49)

  • Dermatophytosis (B35)
  • Other superficial mycoses (B36)
  • Candidiasis (B37)
  • Coccidioidomycosis (B38)
  • Histoplasmosis (B39)
  • Blastomycosis (B40)
  • Paracoccidioidomycosis (B41)
  • Sporotrichosis (B42)
  • Chromomycosis and pheomycotic abscess (B43)
  • Aspergillosis (B44)
  • Cryptococcosis (B45)
  • Zygomycosis (B46)
  • Mycetoma (B47)
  • Other mycoses, not elsewhere classified (B48)
  • Unspecified mycosis (B49)

• Protozoal diseases (B50-B64)

  • Plasmodium falciparum malaria (B50)
  • Plasmodium vivax malaria (B51)
  • Plasmodium malariae malaria (B52)
  • Other specified malaria (B53)
  • Unspecified malaria (B54)
  • Leishmaniasis (B55)
  • African trypanosomiasis (B56)
  • Chagas' disease (B57)
  • Toxoplasmosis (B58)
  • Pneumocystosis (B59)
  • Other protozoal diseases, not elsewhere classified (B60)
  • Unspecified protozoal disease (B64)

• Helminthiases (B65-B83)

  • Schistosomiasis [bilharziasis] (B65)
  • Other fluke infections (B66)
  • Echinococcosis (B67)
  • Taeniasis (B68)
  • Cysticercosis (B69)
  • Diphyllobothriasis and sparganosis (B70)
  • Other cestode infections (B71)
  • Dracunculiasis (B72)
  • Onchocerciasis (B73)
  • Filariasis (B74)
  • Trichinellosis (B75)
  • Hookworm diseases (B76)
  • Ascariasis (B77)
  • Strongyloidiasis (B78)
  • Trichuriasis (B79)
  • Enterobiasis (B80)
  • Other intestinal helminthiases, not elsewhere classified (B81)
  • Unspecified intestinal parasitism (B82)
  • Other helminthiases (B83)

• Pediculosis, acariasis and other infestations (B85-B89)

  • Pediculosis and phthiriasis (B85)
  • Scabies (B86)
  • Myiasis (B87)
  • Other infestations (B88)
  • Unspecified parasitic disease (B89)

• Sequelae of infectious and parasitic diseases (B90-B94)

  • Sequelae of tuberculosis (B90)
  • Sequelae of poliomyelitis (B91)
  • Sequelae of leprosy (B92)
  • Sequelae of other and unspecified infectious and parasitic diseases (B94)

• Bacterial and viral infectious agents (B95-B97)

  • Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified elsewhere (B95)
  • Other bacterial agents as the cause of diseases classified elsewhere (B96)
  • Viral agents as the cause of diseases classified elsewhere (B97)

• Other infectious diseases (B99)

  • Other and unspecified infectious diseases (B99)