ICD-10 · PDGM grouping
M63 Disorders of muscle in diseases classified elsewhere
All 24 codes in the M63 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.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
24
Can lead a claim
0
Cannot lead a claim
24
What CMS assigns to M63
None of the 24 codes is assigned a clinical group. None of the 24 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 24.
Code first
CMS grouper convention 128, on all 24 codes. Code first:
- leprosy (A30.-)
- neoplasm (C49.-, C79.89, D21.-, D48.1-)
- schistosomiasis (B65.-)
- trichinellosis (B75)
- underlying disease, such as:
Every code in M63
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 |
|---|---|---|---|---|
| M63.8 Disorders of muscle in diseases classified elsewhere | ||||
| M63.80 | Disorders of muscle in diseases classified elsewhere, unspecified siteCMS: Disorders of muscle in diseases classd elswhr, unsp site | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.81 Disorders of muscle in diseases classified elsewhere, shoulder | ||||
| M63.811 | Disorders of muscle in diseases classified elsewhere, right shoulderCMS: Disorders of muscle in diseases classd elswhr, r shoulder | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.812 | Disorders of muscle in diseases classified elsewhere, left shoulderCMS: Disorders of muscle in diseases classd elswhr, left shoulder | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.819 | Disorders of muscle in diseases classified elsewhere, unspecified shoulderCMS: Disorders of muscle in diseases classd elswhr, unsp shoulder | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.82 Disorders of muscle in diseases classified elsewhere, upper arm | ||||
| M63.821 | Disorders of muscle in diseases classified elsewhere, right upper armCMS: Disorders of muscle in diseases classd elswhr, r up arm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.822 | Disorders of muscle in diseases classified elsewhere, left upper armCMS: Disorders of muscle in diseases classd elswhr, l up arm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.829 | Disorders of muscle in diseases classified elsewhere, unspecified upper armCMS: Disord of muscle in diseases classd elswhr, unsp upper arm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.83 Disorders of muscle in diseases classified elsewhere, forearm | ||||
| M63.831 | Disorders of muscle in diseases classified elsewhere, right forearmCMS: Disorders of muscle in diseases classd elswhr, right forearm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.832 | Disorders of muscle in diseases classified elsewhere, left forearmCMS: Disorders of muscle in diseases classd elswhr, left forearm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.839 | Disorders of muscle in diseases classified elsewhere, unspecified forearmCMS: Disorders of muscle in diseases classd elswhr, unsp forearm | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.84 Disorders of muscle in diseases classified elsewhere, hand | ||||
| M63.841 | Disorders of muscle in diseases classified elsewhere, right handCMS: Disorders of muscle in diseases classd elswhr, right hand | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.842 | Disorders of muscle in diseases classified elsewhere, left handCMS: Disorders of muscle in diseases classd elswhr, left hand | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.849 | Disorders of muscle in diseases classified elsewhere, unspecified handCMS: Disorders of muscle in diseases classd elswhr, unsp hand | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.85 Disorders of muscle in diseases classified elsewhere, thigh | ||||
| M63.851 | Disorders of muscle in diseases classified elsewhere, right thighCMS: Disorders of muscle in diseases classd elswhr, right thigh | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.852 | Disorders of muscle in diseases classified elsewhere, left thighCMS: Disorders of muscle in diseases classd elswhr, left thigh | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.859 | Disorders of muscle in diseases classified elsewhere, unspecified thighCMS: Disorders of muscle in diseases classd elswhr, unsp thigh | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.86 Disorders of muscle in diseases classified elsewhere, lower leg | ||||
| M63.861 | Disorders of muscle in diseases classified elsewhere, right lower legCMS: Disorders of muscle in diseases classd elswhr, r low leg | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.862 | Disorders of muscle in diseases classified elsewhere, left lower legCMS: Disorders of muscle in diseases classd elswhr, l low leg | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.869 | Disorders of muscle in diseases classified elsewhere, unspecified lower legCMS: Disord of muscle in diseases classd elswhr, unsp lower leg | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.87 Disorders of muscle in diseases classified elsewhere, ankle and foot | ||||
| M63.871 | Disorders of muscle in diseases classified elsewhere, right ankle and footCMS: Disorders of muscle in diseases classd elswhr, right ank/ft | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.872 | Disorders of muscle in diseases classified elsewhere, left ankle and footCMS: Disorders of muscle in diseases classd elswhr, left ank/ft | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.879 | Disorders of muscle in diseases classified elsewhere, unspecified ankle and footCMS: Disorders of muscle in diseases classd elswhr, unsp ank/ft | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.88 | Disorders of muscle in diseases classified elsewhere, other siteCMS: Disorders of muscle in diseases classd elswhr, oth site | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| M63.89 | Disorders of muscle in diseases classified elsewhere, multiple sitesCMS: Disord of muscle in diseases classd elswhr, multiple sites | 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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