ICD-10 Q78.9
Billable / SpecificOsteochondrodysplasia, unspecified
About ICD-10-CM Q78.9
ICD-10-CM code Q78.9 represents Osteochondrodysplasia, unspecified. This is a billable/specific code in the Congenital Malformations chapter (block Q78). The 2026 edition of ICD-10-CM Q78.9 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q78.9. Per CMS ICD-10-CM Tabular 2026.
- Chondrodystrophy NOS
- Osteodystrophy NOS
Medicare LCD Coverage for Q78.9
Local Coverage Determinations (LCDs) from CMS MACs that list Q78.9 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q78.9.
1 Aetna
CPT Codes Commonly Billed with Q78.9
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert Q78.9 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| Q78.9 | 75650 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Q78.9
Other codes in section Q65-Q79 (Congenital malformations and deformations of the musculoskeletal system).
ICD-10 Q78.9, Billing FAQ
Is ICD-10 code Q78.9 billable? +
Yes, Q78.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to Q78.9? +
ICD-10 Q78.9 includes: Chondrodystrophy NOS; Osteodystrophy NOS.
What ICD-9 codes does Q78.9 map to? +
Per CMS GEMs, Q78.9 maps to ICD-9 codes: 75650. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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