ICD-10 · PDGM grouping
M34 Systemic sclerosis [scleroderma]
All 8 codes in the M34 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
8
Can lead a claim
8
Cannot lead a claim
0
What CMS assigns to M34
All 8 codes group to Musculoskeletal Rehabilitation. None of the 8 is assigned a comorbidity subgroup. Every code can lead a claim. CMS attaches a code-first note to 1 of the 8.
Code first
CMS grouper convention 13, on M34.2. Code first:
- poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
Every code in M34
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 |
|---|---|---|---|---|
| M34.0 | Progressive systemic sclerosis | Can lead a claim | E | None |
| M34.1 | CR(E)ST syndrome | Can lead a claim | E | None |
| M34.2 | Systemic sclerosis induced by drug and chemical | Can lead a claim, code first applies | E | None |
| M34.8 Other forms of systemic sclerosis | ||||
| M34.81 | Systemic sclerosis with lung involvement | Can lead a claim | E | None |
| M34.82 | Systemic sclerosis with myopathy | Can lead a claim | E | None |
| M34.83 | Systemic sclerosis with polyneuropathy | Can lead a claim | E | None |
| M34.89 | Other systemic sclerosis | Can lead a claim | E | None |
| M34.9 | Systemic sclerosis, unspecified | Can lead a claim | E | 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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