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Free Medical Coding > ICD10 CM > 2025 ICD-10-CM Codes > 2025 ICD-10-CM Codes A00-B99 – Certain infectious and parasitic diseases (A00-B99)

2025 ICD-10-CM Codes A00-B99 – Certain infectious and parasitic diseases (A00-B99)

Type 1 Excludes

  • certain localized infections – see body system-related chapters

Type 2 Excludes

  • 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)

Includes

  • diseases generally recognized as communicable or transmissible

Use Additional

  • code to identify resistance to antimicrobial drugs (Z16.-)
  • Codes Description
  • A00-A09
    Intestinal infectious diseases (A00-A09)
  • A15-A19
    Tuberculosis (A15-A19)
  • A20-A28
    Certain zoonotic bacterial diseases (A20-A28)
  • A30-A49
    Other bacterial diseases (A30-A49)
  • A50-A64
    Infections with a predominantly sexual mode of transmission (A50-A64)
  • A65-A69
    Other spirochetal diseases (A65-A69)
  • A70-A74
    Other diseases caused by chlamydiae (A70-A74)
  • A75-A79
    Rickettsioses (A75-A79)
  • A80-A89
    Viral and prion infections of the central nervous system (A80-A89)
  • A90-A99
    Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)
  • B00-B09
    Viral infections characterized by skin and mucous membrane lesions (B00-B09)
  • B10-B10
    Other human herpesviruses (B10)
  • B15-B19
    Viral hepatitis (B15-B19)
  • B20-B20
    Human immunodeficiency virus [HIV] disease (B20)
  • B25-B34
    Other viral diseases (B25-B34)
  • B35-B49
    Mycoses (B35-B49)
  • B50-B64
    Protozoal diseases (B50-B64)
  • B65-B83
    Helminthiases (B65-B83)
  • B85-B89
    Pediculosis, acariasis and other infestations (B85-B89)
  • B90-B94
    Sequelae of infectious and parasitic diseases (B90-B94)
  • B95-B97
    Bacterial and viral infectious agents (B95-B97)
  • B99-B99
    Other infectious diseases (B99)

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