ICD-10 · PDGM grouping
G32 Other degenerative disorders of nervous system in diseases classified elsewhere
All 3 codes in the G32 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
3
Can lead a claim
0
Cannot lead a claim
3
What CMS assigns to G32
None of the 3 codes is assigned a clinical group. None of the 3 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 3.
Code first
CMS grouper convention 34, on G32.0. Code first:
- other dietary vitamin B12 deficiency anemia (D51.3)
- underlying disease, such as:
- vitamin B12 deficiency (E53.8)
- vitamin B12 deficiency anemia due to intrinsic factor deficiency (D51.0)
- vitamin B12 deficiency anemia, unspecified (D51.8)
CMS grouper convention 35, on G32.81. Code first:
- amyloidosis cerebral degeneration (E85.-)
- celiac disease (with gluten ataxia) (K90.0)
- cerebellar ataxia (in) neoplastic disease (paraneoplastic cerebellar degeneration) (C00-D49)
- cerebral degeneration (due to) hypothyroidism (E00.0-E03.9)
- cerebral degeneration (due to) neoplasm (C00-D49)
- cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)
- non-celiac gluten ataxia (M35.9)
- underlying disease, such as:
- underlying disease, such as:
CMS grouper convention 36, on G32.89. Code first:
- amyloidosis cerebral degeneration (E85.-)
- cerebral degeneration (due to) hypothyroidism (E00.0-E03.9)
- cerebral degeneration (due to) neoplasm (C00-D49)
- cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)
- underlying disease, such as:
Every code in G32
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 |
|---|---|---|---|---|
| G32.0 | Subacute combined degeneration of spinal cord in diseases classified elsewhereCMS: Subac comb degeneration of spinal cord in dis classd elswhr | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere | ||||
| G32.81 | Cerebellar ataxia in diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| G32.89 | Other specified degenerative disorders of nervous system in diseases classified elsewhereCMS: Oth degeneratv disord of nervous sys in dis classd elswhr | Cannot lead a claimManifestation code is not reportable as principal diagnosis | 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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