All ICD10 Codes
Chapter 1

A00–B99: Certain Infectious and Parasitic Diseases

Certain Infectious and Parasitic Diseases diagnostic classification updated for 2026.

Chapter Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • 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)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)
All CodesBillable Only
Internal Codes
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  • B42.1—

    Lymphocutaneous sporotrichosis

  • B42.7—

    Disseminated sporotrichosis

  • B42.81—

    Cerebral sporotrichosis

  • B42.82—

    Sporotrichosis arthritis

  • B42.89—

    Other forms of sporotrichosis

  • B42.9—

    Sporotrichosis, unspecified

  • B43.0—

    Cutaneous chromomycosis

  • B43.1—

    Pheomycotic brain abscess

  • B43.2—

    Subcutaneous pheomycotic abscess and cyst

  • B43.8—

    Other forms of chromomycosis

  • B43.9—

    Chromomycosis, unspecified

  • B44.0—

    Invasive pulmonary aspergillosis

  • B44.1—

    Other pulmonary aspergillosis

  • B44.2—

    Tonsillar aspergillosis

  • B44.7—

    Disseminated aspergillosis

  • B44.81—

    Allergic bronchopulmonary aspergillosis

  • B44.89—

    Other forms of aspergillosis

  • B44.9—

    Aspergillosis, unspecified

  • B45.0—

    Pulmonary cryptococcosis

  • B45.1—

    Cerebral cryptococcosis

  • B45.2—

    Cutaneous cryptococcosis

  • B45.3—

    Osseous cryptococcosis

  • B45.7—

    Disseminated cryptococcosis

  • B45.8—

    Other forms of cryptococcosis

  • B45.9—

    Cryptococcosis, unspecified

  • B46.0—

    Pulmonary mucormycosis

  • B46.1—

    Rhinocerebral mucormycosis

  • B46.2—

    Gastrointestinal mucormycosis

  • B46.3—

    Cutaneous mucormycosis

  • B46.4—

    Disseminated mucormycosis

  • B46.5—

    Mucormycosis, unspecified

  • B46.8—

    Other zygomycoses

  • B46.9—

    Zygomycosis, unspecified

  • B47.0—

    Eumycetoma

  • B47.1—

    Actinomycetoma

  • B47.9—

    Mycetoma, unspecified

  • B48.0—

    Lobomycosis

  • B48.1—

    Rhinosporidiosis

  • B48.2—

    Allescheriasis

  • B48.3—

    Geotrichosis

  • B48.4—

    Penicillosis

  • B48.8—

    Other specified mycoses

  • B49—

    Unspecified mycosis

  • B50.0—

    Plasmodium falciparum malaria with cerebral complications

  • B50.8—

    Other severe and complicated Plasmodium falciparum malaria

  • B50.9—

    Plasmodium falciparum malaria, unspecified

  • B51.0—

    Plasmodium vivax malaria with rupture of spleen

  • B51.8—

    Plasmodium vivax malaria with other complications

  • B51.9—

    Plasmodium vivax malaria without complication

  • B52.0—

    Plasmodium malariae malaria with nephropathy

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