ICD-10 · PDGM grouping
A42 Actinomycosis
All 8 codes in the A42 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
8
Can lead a claim
8
Cannot lead a claim
0
What CMS assigns to A42
All 8 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases (6) and Neuro Rehabilitation (2). None of the 8 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in A42
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 |
|---|---|---|---|---|
| A42.0 | Pulmonary actinomycosis | Can lead a claim | K | None |
| A42.1 | Abdominal actinomycosis | Can lead a claim | K | None |
| A42.2 | Cervicofacial actinomycosis | Can lead a claim | K | None |
| A42.7 | Actinomycotic sepsis | Can lead a claim | K | None |
| A42.8 Other forms of actinomycosis | ||||
| A42.81 | Actinomycotic meningitis | Can lead a claim | B | None |
| A42.82 | Actinomycotic encephalitis | Can lead a claim | B | None |
| A42.89 | Other forms of actinomycosis | Can lead a claim | K | None |
| A42.9 | Actinomycosis, 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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