ICD-10 M24.669
Billable / SpecificAnkylosis, unspecified knee
About ICD-10-CM M24.669
ICD-10-CM code M24.669 represents Ankylosis, unspecified knee. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M24). The 2026 edition of ICD-10-CM M24.669 became effective on October 1, 2025.
Medicare LCD Coverage for M24.669
Local Coverage Determinations (LCDs) from CMS MACs that list M24.669 as a covered diagnosis.
Showing top 10 of 16 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M24.669.
2 Medicare
1 Aetna
CPT Codes Commonly Billed with M24.669
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 M24.669 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 |
|---|---|---|
| M24.669 | 71856 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M24.669
Other codes in section M20-M25 (Other joint disorders).
ICD-10 M24.669, Billing FAQ
Is ICD-10 code M24.669 billable? +
Yes, M24.669 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does M24.669 map to? +
Per CMS GEMs, M24.669 maps to ICD-9 codes: 71856. 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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