A22 Anthrax

Not billable (header)Chapter 1

Report one of the more specific codes below.

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Codes under this one

A22.0 Cutaneous anthrax
A22.1 Pulmonary anthrax
A22.2 Gastrointestinal anthrax
A22.7 Anthrax sepsis
A22.8 Other forms of anthrax
A22.9 Anthrax, unspecified

Instructional notes

Chapter 1

Excludes2Not included here: the patient may have both; report both when both are present.

carrier or suspected carrier of infectious disease (Z22.-)
certain localized infections - see body system-related chapters
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 codeAdd a second code for the full picture.

code to identify resistance to antimicrobial drugs (Z16.-)

Includes

diseases generally recognized as communicable or transmissible

This code

Includes

infection due to Bacillus anthracis

Chapter 1: Certain infectious and parasitic diseases · A20-A28 Certain zoonotic bacterial diseases (A20-A28)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.