ICD-10 Code for Anthrax
The ICD-10-CM code for anthrax is A22.9 — Anthrax, unspecified. This is the code the Alphabetic Index gives for anthrax with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A22.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which anthrax code should you use?
The Alphabetic Index lists 6 codes under Anthrax. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| with pneumonia | A22.1 | Pulmonary anthrax | |
| cerebral | A22.8 | Other forms of anthrax | |
| colitis | A22.2 | Gastrointestinal anthrax | |
| cutaneous | A22.0 | Cutaneous anthrax | |
| gastrointestinal | A22.2 | Gastrointestinal anthrax | |
| inhalation | A22.1 | Pulmonary anthrax | |
| intestinal | A22.2 | Gastrointestinal anthrax | |
| meningitis | A22.8 | Other forms of anthrax | |
| pulmonary | A22.1 | Pulmonary anthrax | |
| respiratory | A22.1 | Pulmonary anthrax | |
| sepsis | A22.7 | Anthrax sepsis | |
| specified manifestation NEC | A22.8 | Other forms of anthrax |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources