ICD-10 · PDGM grouping
M94 Other disorders of cartilage
All 40 codes in the M94 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
40
Can lead a claim
29
Cannot lead a claim
11
What CMS assigns to M94
29 of the 40 codes group to Musculoskeletal Rehabilitation; 11 are assigned no clinical group. None of the 40 is assigned a comorbidity subgroup. 29 of the 40 can lead a claim. CMS attaches a code-first note to 3 of the 40.
Code first
CMS grouper convention 133, on M94.351, M94.352, M94.359. Code first:
- any associated slipped upper femoral epiphysis (nontraumatic) (M93.0-)
Every code in M94
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 |
|---|---|---|---|---|
| M94.0 | Chondrocostal junction syndrome [Tietze] | Can lead a claim | E | None |
| M94.1 | Relapsing polychondritis | Can lead a claim | E | None |
| M94.2 Chondromalacia | ||||
| M94.20 | Chondromalacia, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.21 Chondromalacia, shoulder | ||||
| M94.211 | Chondromalacia, right shoulder | Can lead a claim | E | None |
| M94.212 | Chondromalacia, left shoulder | Can lead a claim | E | None |
| M94.219 | Chondromalacia, unspecified shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.22 Chondromalacia, elbow | ||||
| M94.221 | Chondromalacia, right elbow | Can lead a claim | E | None |
| M94.222 | Chondromalacia, left elbow | Can lead a claim | E | None |
| M94.229 | Chondromalacia, unspecified elbow | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.23 Chondromalacia, wrist | ||||
| M94.231 | Chondromalacia, right wrist | Can lead a claim | E | None |
| M94.232 | Chondromalacia, left wrist | Can lead a claim | E | None |
| M94.239 | Chondromalacia, unspecified wrist | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.24 Chondromalacia, joints of hand | ||||
| M94.241 | Chondromalacia, joints of right hand | Can lead a claim | E | None |
| M94.242 | Chondromalacia, joints of left hand | Can lead a claim | E | None |
| M94.249 | Chondromalacia, joints of unspecified hand | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.25 Chondromalacia, hip | ||||
| M94.251 | Chondromalacia, right hip | Can lead a claim | E | None |
| M94.252 | Chondromalacia, left hip | Can lead a claim | E | None |
| M94.259 | Chondromalacia, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.26 Chondromalacia, knee | ||||
| M94.261 | Chondromalacia, right knee | Can lead a claim | E | None |
| M94.262 | Chondromalacia, left knee | Can lead a claim | E | None |
| M94.269 | Chondromalacia, unspecified knee | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.27 Chondromalacia, ankle and joints of foot | ||||
| M94.271 | Chondromalacia, right ankle and joints of right foot | Can lead a claim | E | None |
| M94.272 | Chondromalacia, left ankle and joints of left foot | Can lead a claim | E | None |
| M94.279 | Chondromalacia, unspecified ankle and joints of foot | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.28 | Chondromalacia, other site | Can lead a claim | E | None |
| M94.29 | Chondromalacia, multiple sites | Can lead a claim | E | None |
| M94.3 Chondrolysis | ||||
| M94.35 Chondrolysis, hip | ||||
| M94.351 | Chondrolysis, right hip | Can lead a claim, code first applies | E | None |
| M94.352 | Chondrolysis, left hip | Can lead a claim, code first applies | E | None |
| M94.359 | Chondrolysis, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.8 Other specified disorders of cartilage | ||||
| M94.8X Other specified disorders of cartilage | ||||
| M94.8X0 | Other specified disorders of cartilage, multiple sites | Can lead a claim | E | None |
| M94.8X1 | Other specified disorders of cartilage, shoulder | Can lead a claim | E | None |
| M94.8X2 | Other specified disorders of cartilage, upper arm | Can lead a claim | E | None |
| M94.8X3 | Other specified disorders of cartilage, forearm | Can lead a claim | E | None |
| M94.8X4 | Other specified disorders of cartilage, hand | Can lead a claim | E | None |
| M94.8X5 | Other specified disorders of cartilage, thigh | Can lead a claim | E | None |
| M94.8X6 | Other specified disorders of cartilage, lower leg | Can lead a claim | E | None |
| M94.8X7 | Other specified disorders of cartilage, ankle and foot | Can lead a claim | E | None |
| M94.8X8 | Other specified disorders of cartilage, other site | Can lead a claim | E | None |
| M94.8X9 | Other specified disorders of cartilage, unspecified sites | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M94.9 | Disorder of cartilage, 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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