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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  • A15.8—

    Other respiratory tuberculosis

  • A15.9—

    Respiratory tuberculosis unspecified

  • A17—

    Tuberculosis of nervous system

  • A17.0—

    Tuberculous meningitis

  • A17.1—

    Meningeal tuberculoma

  • A17.8—

    Other tuberculosis of nervous system

  • A17.81—

    Tuberculoma of brain and spinal cord

  • A17.82—

    Tuberculous meningoencephalitis

  • A17.83—

    Tuberculous neuritis

  • A17.89—

    Other tuberculosis of nervous system

  • A17.9—

    Tuberculosis of nervous system, unspecified

  • A18—

    Tuberculosis of other organs

  • A18.0—

    Tuberculosis of bones and joints

  • A18.01—

    Tuberculosis of spine

  • A18.02—

    Tuberculous arthritis of other joints

  • A18.03—

    Tuberculosis of other bones

  • A18.09—

    Other musculoskeletal tuberculosis

  • A18.1—

    Tuberculosis of genitourinary system

  • A18.10—

    Tuberculosis of genitourinary system, unspecified

  • A18.11—

    Tuberculosis of kidney and ureter

  • A18.12—

    Tuberculosis of bladder

  • A18.13—

    Tuberculosis of other urinary organs

  • A18.14—

    Tuberculosis of prostate

  • A18.15—

    Tuberculosis of other male genital organs

  • A18.16—

    Tuberculosis of cervix

  • A18.17—

    Tuberculous female pelvic inflammatory disease

  • A18.18—

    Tuberculosis of other female genital organs

  • A18.2—

    Tuberculous peripheral lymphadenopathy

  • A18.3—

    Tuberculosis of intestines, peritoneum and mesenteric glands

  • A18.31—

    Tuberculous peritonitis

  • A18.32—

    Tuberculous enteritis

  • A18.39—

    Retroperitoneal tuberculosis

  • A18.4—

    Tuberculosis of skin and subcutaneous tissue

  • A18.5—

    Tuberculosis of eye

  • A18.50—

    Tuberculosis of eye, unspecified

  • A18.51—

    Tuberculous episcleritis

  • A18.52—

    Tuberculous keratitis

  • A18.53—

    Tuberculous chorioretinitis

  • A18.54—

    Tuberculous iridocyclitis

  • A18.59—

    Other tuberculosis of eye

  • A18.6—

    Tuberculosis of (inner) (middle) ear

  • A18.7—

    Tuberculosis of adrenal glands

  • A18.8—

    Tuberculosis of other specified organs

  • A18.81—

    Tuberculosis of thyroid gland

  • A18.82—

    Tuberculosis of other endocrine glands

  • A18.83—

    Tuberculosis of digestive tract organs, not elsewhere classified

  • A18.84—

    Tuberculosis of heart

  • A18.85—

    Tuberculosis of spleen

  • A18.89—

    Tuberculosis of other sites

  • A19—

    Miliary tuberculosis

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