ICD-10 · PDGM grouping
A22 Anthrax
All 6 codes in the A22 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
6
Can lead a claim
6
Cannot lead a claim
0
What CMS assigns to A22
All 6 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. 1 of the 6 counts toward the Whooping Cough and Pneumonia comorbidity subgroup; 5 are assigned none. Every code can lead a claim.
- Whooping Cough and Pneumonia: counts toward the high comorbidity tier only in an interaction pair.
Every code in A22
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| A22.0 | Cutaneous anthrax | Can lead a claim | K | None |
| A22.1 | Pulmonary anthrax | Can lead a claim | K | Whooping Cough and Pneumonia |
| A22.2 | Gastrointestinal anthrax | Can lead a claim | K | None |
| A22.7 | Anthrax sepsis | Can lead a claim | K | None |
| A22.8 | Other forms of anthrax | Can lead a claim | K | None |
| A22.9 | Anthrax, unspecified | Can lead a claim | K | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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