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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  • B83—

    Other helminthiases

  • B83.0—

    Visceral larva migrans

  • B83.1—

    Gnathostomiasis

  • B83.2—

    Angiostrongyliasis due to Parastrongylus cantonensis

  • B83.3—

    Syngamiasis

  • B83.4—

    Internal hirudiniasis

  • B83.8—

    Other specified helminthiases

  • B83.9—

    Helminthiasis, unspecified

  • B85—

    Pediculosis and phthiriasis

  • B85.0—

    Pediculosis due to Pediculus humanus capitis

  • B85.1—

    Pediculosis due to Pediculus humanus corporis

  • B85.2—

    Pediculosis, unspecified

  • B85.3—

    Phthiriasis

  • B85.4—

    Mixed pediculosis and phthiriasis

  • B86—

    Scabies

  • B87—

    Myiasis

  • B87.0—

    Cutaneous myiasis

  • B87.1—

    Wound myiasis

  • B87.2—

    Ocular myiasis

  • B87.3—

    Nasopharyngeal myiasis

  • B87.4—

    Aural myiasis

  • B87.8—

    Myiasis of other sites

  • B87.81—

    Genitourinary myiasis

  • B87.82—

    Intestinal myiasis

  • B87.89—

    Myiasis of other sites

  • B87.9—

    Myiasis, unspecified

  • B88—

    Other infestations

  • B88.0—

    Other acariasis

  • B88.01—

    Infestation by Demodex mites

  • B88.09—

    Other acariasis

  • B88.1—

    Tungiasis [sandflea infestation]

  • B88.2—

    Other arthropod infestations

  • B88.3—

    External hirudiniasis

  • B88.8—

    Other specified infestations

  • B88.9—

    Infestation, unspecified

  • B89—

    Unspecified parasitic disease

  • B90—

    Sequelae of tuberculosis

  • B90.0—

    Sequelae of central nervous system tuberculosis

  • B90.1—

    Sequelae of genitourinary tuberculosis

  • B90.2—

    Sequelae of tuberculosis of bones and joints

  • B90.8—

    Sequelae of tuberculosis of other organs

  • B90.9—

    Sequelae of respiratory and unspecified tuberculosis

  • B91—

    Sequelae of poliomyelitis

  • B92—

    Sequelae of leprosy

  • B94—

    Sequelae of other and unspecified infectious and parasitic diseases

  • B94.0—

    Sequelae of trachoma

  • B94.1—

    Sequelae of viral encephalitis

  • B94.2—

    Sequelae of viral hepatitis

  • B94.8—

    Sequelae of other specified infectious and parasitic diseases

  • B94.9—

    Sequelae of unspecified infectious and parasitic disease

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