ICD-10 · PDGM grouping
M35 Other systemic involvement of connective tissue
All 23 codes in the M35 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
23
Can lead a claim
22
Cannot lead a claim
1
What CMS assigns to M35
22 of the 23 codes group to Musculoskeletal Rehabilitation; 1 is assigned no clinical group. None of the 23 is assigned a comorbidity subgroup. 22 of the 23 can lead a claim. CMS attaches a code-first note to 1 of the 23.
Code first
CMS grouper convention 118, on M35.81. Code first:
- , if applicable, COVID-19 (U07.1)
Every code in M35
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 |
|---|---|---|---|---|
| M35.0 Sjogren syndrome | ||||
| M35.00 | Sjogren syndrome, unspecified | Can lead a claim | E | None |
| M35.01 | Sjogren syndrome with keratoconjunctivitis | Can lead a claim | E | None |
| M35.02 | Sjogren syndrome with lung involvement | Can lead a claim | E | None |
| M35.03 | Sjogren syndrome with myopathy | Can lead a claim | E | None |
| M35.04 | Sjogren syndrome with tubulo-interstitial nephropathy | Can lead a claim | E | None |
| M35.05 | Sjogren syndrome with inflammatory arthritis | Can lead a claim | E | None |
| M35.06 | Sjogren syndrome with peripheral nervous system involvement | Can lead a claim | E | None |
| M35.07 | Sjogren syndrome with central nervous system involvement | Can lead a claim | E | None |
| M35.08 | Sjogren syndrome with gastrointestinal involvement | Can lead a claim | E | None |
| M35.0A | Sjogren syndrome with glomerular disease | Can lead a claim | E | None |
| M35.0B | Sjogren syndrome with vasculitis | Can lead a claim | E | None |
| M35.0C | Sjogren syndrome with dental involvement | Can lead a claim | E | None |
| M35.09 | Sjogren syndrome with other organ involvement | Can lead a claim | E | None |
| M35.1 | Other overlap syndromes | Can lead a claim | E | None |
| M35.2 | Behcet's disease | Can lead a claim | E | None |
| M35.3 | Polymyalgia rheumatica | Can lead a claim | E | None |
| M35.4 | Diffuse (eosinophilic) fasciitis | Can lead a claim | E | None |
| M35.5 | Multifocal fibrosclerosis | Can lead a claim | E | None |
| M35.6 | Relapsing panniculitis [Weber-Christian] | Can lead a claim | E | None |
| M35.7 | Hypermobility syndrome | Can lead a claim | E | None |
| M35.8 Other specified systemic involvement of connective tissue | ||||
| M35.81 | Multisystem inflammatory syndrome | Can lead a claim, code first applies | E | None |
| M35.89 | Other specified systemic involvement of connective tissue | Can lead a claim | E | None |
| M35.9 | Systemic involvement of connective tissue, 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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