ICD-10 · PDGM grouping
M36 Systemic disorders of connective tissue in diseases classified elsewhere
All 6 codes in the M36 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
6
Can lead a claim
0
Cannot lead a claim
6
What CMS assigns to M36
None of the 6 codes is assigned a clinical group. None of the 6 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 6.
Code first
CMS grouper convention 9, on M36.0. Code first:
- neoplasm (C00-D49)
CMS grouper convention 119, on M36.1. Code first:
- leukemia (C91-C95)
- malignant histiocytosis (C96.A)
- multiple myeloma (C90.0)
- underlying neoplasm, such as:
CMS grouper convention 120, on M36.2. Code first:
- factor IX deficiency (D67)
- factor VIII deficiency (D66)
- hemophilia (classical) (D66)
- hemophilia B (D67)
- hemophilia C (D68.1)
- underlying disease, such as:
- with vascular defect (D68.0-)
CMS grouper convention 121, on M36.3. Code first:
- disease of blood and blood-forming organs, unspecified (D75.9)
- other hemoglobinopathies (D58.2)
- thalassemia (D56.-)
- underlying disease, such as:
CMS grouper convention 122, on M36.4. Code first:
- Henoch (-Schönlein) purpura (D69.0)
- serum sickness (T80.6-)
- underlying disease, such as:
CMS grouper convention 123, on M36.8. Code first:
- alkaptonuria (E70.29)
- hypogammaglobulinemia (D80.-)
- ochronosis (E70.29)
- underlying disease, such as:
Every code in M36
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 |
|---|---|---|---|---|
| M36.0 | Dermato(poly)myositis in neoplastic disease | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M36.1 | Arthropathy in neoplastic disease | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M36.2 | Hemophilic arthropathy | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M36.3 | Arthropathy in other blood disorders | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M36.4 | Arthropathy in hypersensitivity reactions classified elsewhereCMS: Arthropathy in hypersensitivity reactions classd elswhr | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M36.8 | Systemic disorders of connective tissue in other diseases classified elsewhereCMS: Systemic disord of conn tiss in oth diseases 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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