ICD-10 · PDGM grouping
A03 Shigellosis
All 6 codes in the A03 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 A03
All 6 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. None of the 6 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in A03
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 |
|---|---|---|---|---|
| A03.0 | Shigellosis due to Shigella dysenteriae | Can lead a claim | K | None |
| A03.1 | Shigellosis due to Shigella flexneri | Can lead a claim | K | None |
| A03.2 | Shigellosis due to Shigella boydii | Can lead a claim | K | None |
| A03.3 | Shigellosis due to Shigella sonnei | Can lead a claim | K | None |
| A03.8 | Other shigellosis | Can lead a claim | K | None |
| A03.9 | Shigellosis, 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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