Q78: Other osteochondrodysplasias
Codes under Q78 (Other osteochondrodysplasias). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q78.0 | Osteogenesis imperfecta | ✓ |
| Q78.0 | Osteogenesis imperfecta | ✓ |
| Q78.1 | Polyostotic fibrous dysplasia | ✓ |
| Q78.1 | Polyostotic fibrous dysplasia | ✓ |
| Q78.2 | Osteopetrosis | ✓ |
| Q78.2 | Osteopetrosis | ✓ |
| Q78.3 | Progressive diaphyseal dysplasia | ✓ |
| Q78.3 | Progressive diaphyseal dysplasia | ✓ |
| Q78.4 | Enchondromatosis | ✓ |
| Q78.4 | Enchondromatosis | ✓ |
| Q78.5 | Metaphyseal dysplasia | ✓ |
| Q78.5 | Metaphyseal dysplasia | ✓ |
| Q78.6 | Multiple congenital exostoses | ✓ |
| Q78.6 | Multiple congenital exostoses | ✓ |
| Q78.8 | Other specified osteochondrodysplasias | ✓ |
| Q78.8 | Other specified osteochondrodysplasias | ✓ |
| Q78.9 | Osteochondrodysplasia, unspecified | ✓ |
| Q78.9 | Osteochondrodysplasia, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Q78?
Q78 is an ICD-10-CM category covering Other osteochondrodysplasias. It contains 18 more specific diagnosis codes, 18 of which are billable.
Is Q78 a billable code?
No — Q78 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Q78.0 — Osteogenesis imperfecta). 18 of the 18 codes under Q78 are billable.
What codes fall under Q78?
Q78 includes Q78.0, Q78.0, Q78.1, Q78.1, Q78.2, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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