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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  • B71—

    Other cestode infections

  • B71.0—

    Hymenolepiasis

  • B71.1—

    Dipylidiasis

  • B71.8—

    Other specified cestode infections

  • B71.9—

    Cestode infection, unspecified

  • B72—

    Dracunculiasis

  • B73—

    Onchocerciasis

  • B73.0—

    Onchocerciasis with eye disease

  • B73.00—

    Onchocerciasis with eye involvement, unspecified

  • B73.01—

    Onchocerciasis with endophthalmitis

  • B73.02—

    Onchocerciasis with glaucoma

  • B73.09—

    Onchocerciasis with other eye involvement

  • B73.1—

    Onchocerciasis without eye disease

  • B74—

    Filariasis

  • B74.0—

    Filariasis due to Wuchereria bancrofti

  • B74.1—

    Filariasis due to Brugia malayi

  • B74.2—

    Filariasis due to Brugia timori

  • B74.3—

    Loiasis

  • B74.4—

    Mansonelliasis

  • B74.8—

    Other filariases

  • B74.9—

    Filariasis, unspecified

  • B75—

    Trichinellosis

  • B76—

    Hookworm diseases

  • B76.0—

    Ancylostomiasis

  • B76.1—

    Necatoriasis

  • B76.8—

    Other hookworm diseases

  • B76.9—

    Hookworm disease, unspecified

  • B77—

    Ascariasis

  • B77.0—

    Ascariasis with intestinal complications

  • B77.8—

    Ascariasis with other complications

  • B77.81—

    Ascariasis pneumonia

  • B77.89—

    Ascariasis with other complications

  • B77.9—

    Ascariasis, unspecified

  • B78—

    Strongyloidiasis

  • B78.0—

    Intestinal strongyloidiasis

  • B78.1—

    Cutaneous strongyloidiasis

  • B78.7—

    Disseminated strongyloidiasis

  • B78.9—

    Strongyloidiasis, unspecified

  • B79—

    Trichuriasis

  • B80—

    Enterobiasis

  • B81—

    Other intestinal helminthiases, not elsewhere classified

  • B81.0—

    Anisakiasis

  • B81.1—

    Intestinal capillariasis

  • B81.2—

    Trichostrongyliasis

  • B81.3—

    Intestinal angiostrongyliasis

  • B81.4—

    Mixed intestinal helminthiases

  • B81.8—

    Other specified intestinal helminthiases

  • B82—

    Unspecified intestinal parasitism

  • B82.0—

    Intestinal helminthiasis, unspecified

  • B82.9—

    Intestinal parasitism, unspecified

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