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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  • B38.8—

    Other forms of coccidioidomycosis

  • B38.81—

    Prostatic coccidioidomycosis

  • B38.89—

    Other forms of coccidioidomycosis

  • B38.9—

    Coccidioidomycosis, unspecified

  • B39—

    Histoplasmosis

  • B39.0—

    Acute pulmonary histoplasmosis capsulati

  • B39.1—

    Chronic pulmonary histoplasmosis capsulati

  • B39.2—

    Pulmonary histoplasmosis capsulati, unspecified

  • B39.3—

    Disseminated histoplasmosis capsulati

  • B39.4—

    Histoplasmosis capsulati, unspecified

  • B39.5—

    Histoplasmosis duboisii

  • B39.9—

    Histoplasmosis, unspecified

  • B40—

    Blastomycosis

  • B40.0—

    Acute pulmonary blastomycosis

  • B40.1—

    Chronic pulmonary blastomycosis

  • B40.2—

    Pulmonary blastomycosis, unspecified

  • B40.3—

    Cutaneous blastomycosis

  • B40.7—

    Disseminated blastomycosis

  • B40.8—

    Other forms of blastomycosis

  • B40.81—

    Blastomycotic meningoencephalitis

  • B40.89—

    Other forms of blastomycosis

  • B40.9—

    Blastomycosis, unspecified

  • B41—

    Paracoccidioidomycosis

  • B41.0—

    Pulmonary paracoccidioidomycosis

  • B41.7—

    Disseminated paracoccidioidomycosis

  • B41.8—

    Other forms of paracoccidioidomycosis

  • B41.9—

    Paracoccidioidomycosis, unspecified

  • B42—

    Sporotrichosis

  • B42.0—

    Pulmonary sporotrichosis

  • B42.1—

    Lymphocutaneous sporotrichosis

  • B42.7—

    Disseminated sporotrichosis

  • B42.8—

    Other forms of sporotrichosis

  • B42.81—

    Cerebral sporotrichosis

  • B42.82—

    Sporotrichosis arthritis

  • B42.89—

    Other forms of sporotrichosis

  • B42.9—

    Sporotrichosis, unspecified

  • B43—

    Chromomycosis and pheomycotic abscess

  • 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—

    Aspergillosis

  • B44.0—

    Invasive pulmonary aspergillosis

  • B44.1—

    Other pulmonary aspergillosis

  • B44.2—

    Tonsillar aspergillosis

  • B44.7—

    Disseminated aspergillosis

  • B44.8—

    Other forms of aspergillosis

  • B44.81—

    Allergic bronchopulmonary aspergillosis

  • B44.89—

    Other forms of aspergillosis

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