ICD-10 · PDGM grouping
C71 Malignant neoplasm of brain
All 10 codes in the C71 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
10
Can lead a claim
10
Cannot lead a claim
0
What CMS assigns to C71
All 10 codes group to Neuro Rehabilitation. All 10 count toward the Malignant Neoplasm of Brain comorbidity subgroup. Every code can lead a claim.
- Malignant Neoplasm of Brain
Every code in C71
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 |
|---|---|---|---|---|
| C71.0 | Malignant neoplasm of cerebrum, except lobes and ventricles | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.1 | Malignant neoplasm of frontal lobe | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.2 | Malignant neoplasm of temporal lobe | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.3 | Malignant neoplasm of parietal lobe | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.4 | Malignant neoplasm of occipital lobe | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.5 | Malignant neoplasm of cerebral ventricle | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.6 | Malignant neoplasm of cerebellum | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.7 | Malignant neoplasm of brain stem | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.8 | Malignant neoplasm of overlapping sites of brain | Can lead a claim | B | Malignant Neoplasm of Brain |
| C71.9 | Malignant neoplasm of brain, unspecified | Can lead a claim | B | Malignant Neoplasm of Brain |
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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