ICD-10 · PDGM grouping
M91 Juvenile osteochondrosis of hip and pelvis
All 19 codes in the M91 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
19
Can lead a claim
13
Cannot lead a claim
6
What CMS assigns to M91
13 of the 19 codes group to Musculoskeletal Rehabilitation; 6 are assigned no clinical group. None of the 19 is assigned a comorbidity subgroup. 13 of the 19 can lead a claim.
Every code in M91
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 |
|---|---|---|---|---|
| M91.0 | Juvenile osteochondrosis of pelvis | Can lead a claim | E | None |
| M91.1 Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes] | ||||
| M91.10 | Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], unspecified legCMS: Juvenile osteochondrosis of head of femur, unspecified leg | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.11 | Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], right legCMS: Juvenile osteochondrosis of head of femur, right leg | Can lead a claim | E | None |
| M91.12 | Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], left legCMS: Juvenile osteochondrosis of head of femur, left leg | Can lead a claim | E | None |
| M91.2 Coxa plana | ||||
| M91.20 | Coxa plana, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.21 | Coxa plana, right hip | Can lead a claim | E | None |
| M91.22 | Coxa plana, left hip | Can lead a claim | E | None |
| M91.3 Pseudocoxalgia | ||||
| M91.30 | Pseudocoxalgia, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.31 | Pseudocoxalgia, right hip | Can lead a claim | E | None |
| M91.32 | Pseudocoxalgia, left hip | Can lead a claim | E | None |
| M91.4 Coxa magna | ||||
| M91.40 | Coxa magna, unspecified hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.41 | Coxa magna, right hip | Can lead a claim | E | None |
| M91.42 | Coxa magna, left hip | Can lead a claim | E | None |
| M91.8 Other juvenile osteochondrosis of hip and pelvis | ||||
| M91.80 | Other juvenile osteochondrosis of hip and pelvis, unspecified legCMS: Other juvenile osteochondrosis of hip and pelvis, unsp leg | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.81 | Other juvenile osteochondrosis of hip and pelvis, right leg | Can lead a claim | E | None |
| M91.82 | Other juvenile osteochondrosis of hip and pelvis, left leg | Can lead a claim | E | None |
| M91.9 Juvenile osteochondrosis of hip and pelvis, unspecified | ||||
| M91.90 | Juvenile osteochondrosis of hip and pelvis, unspecified, unspecified legCMS: Juvenile osteochondrosis of hip and pelvis, unsp, unsp leg | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| M91.91 | Juvenile osteochondrosis of hip and pelvis, unspecified, right legCMS: Juvenile osteochondrosis of hip and pelvis, unsp, right leg | Can lead a claim | E | None |
| M91.92 | Juvenile osteochondrosis of hip and pelvis, unspecified, left legCMS: Juvenile osteochondrosis of hip and pelvis, unsp, left leg | Can lead a claim | E | 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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