ICD-10 · PDGM grouping
R79 Other abnormal findings of blood chemistry
All 7 codes in the R79 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
7
Can lead a claim
0
Cannot lead a claim
7
What CMS assigns to R79
None of the 7 codes is assigned a clinical group. None of the 7 is assigned a comorbidity subgroup. None can lead a claim.
Every code in R79
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 |
|---|---|---|---|---|
| R79.0 | Abnormal level of blood mineral | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.1 | Abnormal coagulation profile | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.8 Other specified abnormal findings of blood chemistry | ||||
| R79.81 | Abnormal blood-gas level | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.82 | Elevated C-reactive protein (CRP) | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.83 | Abnormal findings of blood amino-acid level | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.89 | Other specified abnormal findings of blood chemistry | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R79.9 | Abnormal finding of blood chemistry, 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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