ICD-10 · PDGM grouping
G12 Spinal muscular atrophy and related syndromes
All 11 codes in the G12 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
11
Can lead a claim
11
Cannot lead a claim
0
What CMS assigns to G12
All 11 codes group to Neuro Rehabilitation. 4 of the 11 count toward the Alzheimer’s disease and related dementias comorbidity subgroup; 7 are assigned none. Every code can lead a claim.
- Alzheimer’s disease and related dementias: counts toward the high comorbidity tier only in an interaction pair.
Every code in G12
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 |
|---|---|---|---|---|
| G12.0 | Infantile spinal muscular atrophy, type I [Werdnig-Hoffman] | Can lead a claim | B | None |
| G12.1 | Other inherited spinal muscular atrophy | Can lead a claim | B | None |
| G12.2 Motor neuron disease | ||||
| G12.20 | Motor neuron disease, unspecified | Can lead a claim | B | None |
| G12.21 | Amyotrophic lateral sclerosis | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G12.22 | Progressive bulbar palsy | Can lead a claim | B | None |
| G12.23 | Primary lateral sclerosis | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G12.24 | Familial motor neuron disease | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G12.25 | Progressive spinal muscle atrophy | Can lead a claim | B | Alzheimer’s disease and related dementias |
| G12.29 | Other motor neuron disease | Can lead a claim | B | None |
| G12.8 | Other spinal muscular atrophies and related syndromes | Can lead a claim | B | None |
| G12.9 | Spinal muscular atrophy, unspecified | Can lead a claim | B | 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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