ICD-10 · PDGM grouping
M30-M36 — Systemic connective tissue disorders
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
84
No clinical group
8
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
59 of the 84 codes in M30-M36 group to Musculoskeletal Rehabilitation, but the range is not uniform — it spreads across 2 clinical groups. A further 8 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in M30-M36
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- M30Polyarteritis nodosa and related conditions5 codes
- M31Other necrotizing vasculopathies13 codes
- M32Systemic lupus erythematosus (SLE)10 codes
- M33Dermatopolymyositis19 codes
- M34Systemic sclerosis [scleroderma]8 codes
- M35Other systemic involvement of connective tissue23 codes
- M36Systemic disorders of connective tissue in diseases classified elsewhere6 codes
Every code in M30-M36
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| M300 | Polyarteritis nodosa | A | Can lead a claim |
| M301 | Polyarteritis with lung involvement [Churg-Strauss] | A | Can lead a claim |
| M302 | Juvenile polyarteritis | A | Can lead a claim |
| M303 | Mucocutaneous lymph node syndrome [Kawasaki] | A | Can lead a claim |
| M308 | Other conditions related to polyarteritis nodosa | A | Can lead a claim |
| M310 | Hypersensitivity angiitis | A | Can lead a claim |
| M3110 | Thrombotic microangiopathy, unspecified | A | Can lead a claim |
| M3111 | Hematpoetc stem cell txpltation-assoc throm microangiopathy | None | Cannot lead a claim |
| M3119 | Other thrombotic microangiopathy | A | Can lead a claim |
| M312 | Lethal midline granuloma | A | Can lead a claim |
| M3130 | Wegener's granulomatosis without renal involvement | A | Can lead a claim |
| M3131 | Wegener's granulomatosis with renal involvement | A | Can lead a claim |
| M314 | Aortic arch syndrome [Takayasu] | A | Can lead a claim |
| M315 | Giant cell arteritis with polymyalgia rheumatica | A | Can lead a claim |
| M316 | Other giant cell arteritis | A | Can lead a claim |
| M317 | Microscopic polyangiitis | A | Can lead a claim |
| M318 | Other specified necrotizing vasculopathies | A | Can lead a claim |
| M319 | Necrotizing vasculopathy, unspecified | A | Can lead a claim |
| M320 | Drug-induced systemic lupus erythematosus | E | Can lead a claim |
| M3210 | Systemic lupus erythematosus, organ or system involv unsp | E | Can lead a claim |
| M3211 | Endocarditis in systemic lupus erythematosus | E | Can lead a claim |
| M3212 | Pericarditis in systemic lupus erythematosus | E | Can lead a claim |
| M3213 | Lung involvement in systemic lupus erythematosus | E | Can lead a claim |
| M3214 | Glomerular disease in systemic lupus erythematosus | E | Can lead a claim |
| M3215 | Tubulo-interstitial nephrop in sys lupus erythematosus | E | Can lead a claim |
| M3219 | Oth organ or system involv in systemic lupus erythematosus | E | Can lead a claim |
| M328 | Other forms of systemic lupus erythematosus | E | Can lead a claim |
| M329 | Systemic lupus erythematosus, unspecified | E | Can lead a claim |
| M3300 | Juvenile dermatomyositis, organ involvement unspecified | E | Can lead a claim |
| M3301 | Juvenile dermatomyositis with respiratory involvement | E | Can lead a claim |
| M3302 | Juvenile dermatomyositis with myopathy | E | Can lead a claim |
| M3303 | Juvenile dermatomyositis without myopathy | E | Can lead a claim |
| M3309 | Juvenile dermatomyositis with other organ involvement | E | Can lead a claim |
| M3310 | Other dermatomyositis, organ involvement unspecified | E | Can lead a claim |
| M3311 | Other dermatomyositis with respiratory involvement | E | Can lead a claim |
| M3312 | Other dermatomyositis with myopathy | E | Can lead a claim |
| M3313 | Other dermatomyositis without myopathy | E | Can lead a claim |
| M3319 | Other dermatomyositis with other organ involvement | E | Can lead a claim |
| M3320 | Polymyositis, organ involvement unspecified | E | Can lead a claim |
| M3321 | Polymyositis with respiratory involvement | E | Can lead a claim |
| M3322 | Polymyositis with myopathy | E | Can lead a claim |
| M3329 | Polymyositis with other organ involvement | E | Can lead a claim |
| M3390 | Dermatopolymyositis, unsp, organ involvement unspecified | E | Can lead a claim |
| M3391 | Dermatopolymyositis, unsp with respiratory involvement | E | Can lead a claim |
| M3392 | Dermatopolymyositis, unspecified with myopathy | E | Can lead a claim |
| M3393 | Dermatopolymyositis, unspecified without myopathy | E | Can lead a claim |
| M3399 | Dermatopolymyositis, unsp with other organ involvement | E | Can lead a claim |
| M340 | Progressive systemic sclerosis | E | Can lead a claim |
| M341 | CR(E)ST syndrome | E | Can lead a claim |
| M342 | Systemic sclerosis induced by drug and chemical | E | Can lead a claim, code first applies |
| M3481 | Systemic sclerosis with lung involvement | E | Can lead a claim |
| M3482 | Systemic sclerosis with myopathy | E | Can lead a claim |
| M3483 | Systemic sclerosis with polyneuropathy | E | Can lead a claim |
| M3489 | Other systemic sclerosis | E | Can lead a claim |
| M349 | Systemic sclerosis, unspecified | E | Can lead a claim |
| M3500 | Sjogren syndrome, unspecified | E | Can lead a claim |
| M3501 | Sjogren syndrome with keratoconjunctivitis | E | Can lead a claim |
| M3502 | Sjogren syndrome with lung involvement | E | Can lead a claim |
| M3503 | Sjogren syndrome with myopathy | E | Can lead a claim |
| M3504 | Sjogren syndrome with tubulo-interstitial nephropathy | E | Can lead a claim |
| M3505 | Sjogren syndrome with inflammatory arthritis | E | Can lead a claim |
| M3506 | Sjogren syndrome with peripheral nervous system involvement | E | Can lead a claim |
| M3507 | Sjogren syndrome with central nervous system involvement | E | Can lead a claim |
| M3508 | Sjogren syndrome with gastrointestinal involvement | E | Can lead a claim |
| M3509 | Sjogren syndrome with other organ involvement | E | Can lead a claim |
| M350A | Sjogren syndrome with glomerular disease | E | Can lead a claim |
| M350B | Sjogren syndrome with vasculitis | E | Can lead a claim |
| M350C | Sjogren syndrome with dental involvement | E | Can lead a claim |
| M351 | Other overlap syndromes | E | Can lead a claim |
| M352 | Behcet's disease | E | Can lead a claim |
| M353 | Polymyalgia rheumatica | E | Can lead a claim |
| M354 | Diffuse (eosinophilic) fasciitis | E | Can lead a claim |
| M355 | Multifocal fibrosclerosis | E | Can lead a claim |
| M356 | Relapsing panniculitis [Weber-Christian] | E | Can lead a claim |
| M357 | Hypermobility syndrome | E | Can lead a claim |
| M3581 | Multisystem inflammatory syndrome | E | Can lead a claim, code first applies |
| M3589 | Other specified systemic involvement of connective tissue | E | Can lead a claim |
| M359 | Systemic involvement of connective tissue, unspecified | None | Cannot lead a claim |
| M360 | Dermato(poly)myositis in neoplastic disease | None | Cannot lead a claim |
| M361 | Arthropathy in neoplastic disease | None | Cannot lead a claim |
| M362 | Hemophilic arthropathy | None | Cannot lead a claim |
| M363 | Arthropathy in other blood disorders | None | Cannot lead a claim |
| M364 | Arthropathy in hypersensitivity reactions classd elswhr | None | Cannot lead a claim |
| M368 | Systemic disord of conn tiss in oth diseases classd elswhr | None | Cannot lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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