ICD-10 · PDGM grouping
Q78 Other osteochondrodysplasias
All 9 codes in the Q78 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
9
Can lead a claim
8
Cannot lead a claim
1
What CMS assigns to Q78
8 of the 9 codes group to Musculoskeletal Rehabilitation; 1 is assigned no clinical group. None of the 9 is assigned a comorbidity subgroup. 8 of the 9 can lead a claim.
Every code in Q78
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 |
|---|---|---|---|---|
| Q78.0 | Osteogenesis imperfecta | Can lead a claim | E | None |
| Q78.1 | Polyostotic fibrous dysplasia | Can lead a claim | E | None |
| Q78.2 | Osteopetrosis | Can lead a claim | E | None |
| Q78.3 | Progressive diaphyseal dysplasia | Can lead a claim | E | None |
| Q78.4 | Enchondromatosis | Can lead a claim | E | None |
| Q78.5 | Metaphyseal dysplasia | Can lead a claim | E | None |
| Q78.6 | Multiple congenital exostoses | Can lead a claim | E | None |
| Q78.8 | Other specified osteochondrodysplasias | Can lead a claim | E | None |
| Q78.9 | Osteochondrodysplasia, 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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