Circular 06/2026
Chapter I — Certain infectious and parasitic diseases
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A00-A09 — Intestinal infectious diseases
A00CholeraA01Typhoid and paratyphoid feversA02Other salmonella infectionsA03ShigellosisA04Other bacterial intestinal infectionsA05Other bacterial foodborne intoxications, not elsewhere classifiedA06AmoebiasisA07Other protozoal intestinal diseasesA08Viral and other specified intestinal infectionsA09Other gastroenteritis and colitis of infectious and unspecified origin
A15-A19 — Tuberculosis
A20-A28 — Certain zoonotic bacterial diseases
A30-A49 — Other bacterial diseases
A30Leprosy [Hansen disease]A31Infection due to other mycobacteriaA32ListeriosisA33Tetanus neonatorumA34Obstetrical tetanusA35Other tetanusA36DiphtheriaA37Whooping coughA38Scarlet feverA39Meningococcal infectionA40Streptococcal sepsisA41Other sepsisA42ActinomycosisA43NocardiosisA44BartonellosisA46ErysipelasA48Other bacterial diseases, not elsewhere classifiedA49Bacterial infection of unspecified site
A50-A64 — Infections with a predominantly sexual mode of transmission
A50Congenital syphilisA51Early syphilisA52Late syphilisA53Other and unspecified syphilisA54Gonococcal infectionA55Chlamydial lymphogranuloma (venereum)A56Other sexually transmitted chlamydial diseasesA57ChancroidA58Granuloma inguinaleA59TrichomoniasisA60Anogenital herpesviral [herpes simplex] infectionA63Other predominantly sexually transmitted diseases, not elsewhere classifiedA64Unspecified sexually transmitted disease
A65-A69 — Other spirochaetal diseases
A70-A74 — Other diseases caused by chlamydiae
A75-A79 — Rickettsioses
A80-A89 — Viral infections of the central nervous system
A80Acute poliomyelitisA81Atypical virus infections of central nervous systemA82RabiesA83Mosquito-borne viral encephalitisA84Tick-borne viral encephalitisA85Other viral encephalitis, not elsewhere classifiedA86Unspecified viral encephalitisA87Viral meningitisA88Other viral infections of central nervous system, not elsewhere classifiedA89Unspecified viral infection of central nervous system
A92-A99 — Arthropod-borne viral fevers and viral haemorrhagic fevers
B00-B09 — Viral infections characterized by skin and mucous membrane lesions
B00Herpesviral [herpes simplex] infectionsB01Varicella [chickenpox]B02Zoster [herpes zoster]B03SmallpoxB04MonkeypoxB05MeaslesB06Rubella [German measles]B07Viral wartsB08Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classifiedB09Unspecified viral infection characterized by skin and mucous membrane lesions
B15-B19 — Viral hepatitis
B20-B24 — Human immunodeficiency virus [HIV] disease
B20Human immunodeficiency virus [HIV] disease resulting in infectious and parasitic diseasesB21Human immunodeficiency virus [HIV] disease resulting in malignant neoplasmsB22Human immunodeficiency virus [HIV] disease resulting in other specified diseasesB23Human immunodeficiency virus [HIV] disease resulting in other conditionsB24Unspecified human immunodeficiency virus [HIV] disease
B25-B34 — Other viral diseases
B35-B49 — Mycoses
B35DermatophytosisB36Other superficial mycosesB37CandidiasisB38CoccidioidomycosisB39HistoplasmosisB40BlastomycosisB41ParacoccidioidomycosisB42SporotrichosisB43Chromomycosis and phaeomycotic abscessB44AspergillosisB45CryptococcosisB46ZygomycosisB47MycetomaB48Other mycoses, not elsewhere classifiedB49Unspecified mycosis
B50-B64 — Protozoal diseases
B50Plasmodium falciparum malariaB51Plasmodium vivax malariaB52Plasmodium malariae malariaB53Other parasitologically confirmed malariaB54Unspecified malariaB55LeishmaniasisB56African trypanosomiasisB57Chagas diseaseB58ToxoplasmosisB60Other protozoal diseases, not elsewhere classifiedB64Unspecified protozoal disease
B65-B83 — Helminthiases
B65Schistosomiasis [bilharziasis]B66Other fluke infectionsB67EchinococcosisB68TaeniasisB69CysticercosisB70Diphyllobothriasis and sparganosisB71Other cestode infectionsB72DracunculiasisB73OnchocerciasisB74FilariasisB75TrichinellosisB76Hookworm diseasesB77AscariasisB78StrongyloidiasisB79TrichuriasisB80EnterobiasisB81Other intestinal helminthiases, not elsewhere classifiedB82Unspecified intestinal parasitismB83Other helminthiases
B85-B89 — Pediculosis, acariasis and other infestations
B90-B94 — Sequelae of infectious and parasitic diseases
B95-B98 — Bacterial, viral and other infectious agents
B95Streptococcus and staphylococcus as the cause of diseases classified to other chaptersB96Other specified bacterial agents as the cause of diseases classified to other chaptersB97Viral agents as the cause of diseases classified to other chaptersB98Other specified infectious agents as the cause of diseases classified to other chapters