ICD-10 M24.673
Billable / SpecificAnkylosis, unspecified ankle
About ICD-10-CM M24.673
ICD-10-CM code M24.673 represents Ankylosis, unspecified ankle. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M24). The 2026 edition of ICD-10-CM M24.673 became effective on October 1, 2025.
Medicare LCD Coverage for M24.673
Local Coverage Determinations (LCDs) from CMS MACs that list M24.673 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 M24.673.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but M24.673 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with M24.673
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 M24.673 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 |
|---|---|---|
| M24.673 | 71857 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M24.673
Other codes in section M20-M25 (Other joint disorders).
ICD-10 M24.673, Billing FAQ
Is ICD-10 code M24.673 billable? +
Yes, M24.673 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does M24.673 map to? +
Per CMS GEMs, M24.673 maps to ICD-9 codes: 71857. 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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