ICD-10 · PDGM grouping
R05 Cough
All 6 codes in the R05 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
0
Cannot lead a claim
6
What CMS assigns to R05
None of the 6 codes is assigned a clinical group. None of the 6 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to 1 of the 6.
Code first
CMS grouper convention 151, on R05.4. Code first:
- syncope and collapse (R55)
Every code in R05
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 |
|---|---|---|---|---|
| R05.1 | Acute cough | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R05.2 | Subacute cough | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R05.3 | Chronic cough | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R05.4 | Cough syncope | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| R05.8 | Other specified cough | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R05.9 | Cough, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | 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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