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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