ICD-10 M26.221
Billable / SpecificOpen posterior occlusal relationship
About ICD-10-CM M26.221
ICD-10-CM code M26.221 represents Open posterior occlusal relationship. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M26). The 2026 edition of ICD-10-CM M26.221 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under M26.221. Per CMS ICD-10-CM Tabular 2026.
- Posterior open bite
Medicare LCD Coverage for M26.221
Local Coverage Determinations (LCDs) from CMS MACs that list M26.221 as a covered diagnosis.
Showing top 10 of 90 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M26.221.
2 Medicare
CPT Codes Commonly Billed with M26.221
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 M26.221 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 |
|---|---|---|
| M26.221 | 52425 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M26.221
Other codes in section M26-M27 (Dentofacial anomalies [including malocclusion] and other disorders of jaw).
ICD-10 M26.221, Billing FAQ
Is ICD-10 code M26.221 billable? +
Yes, M26.221 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 M26.221? +
ICD-10 M26.221 includes: Posterior open bite.
What ICD-9 codes does M26.221 map to? +
Per CMS GEMs, M26.221 maps to ICD-9 codes: 52425. 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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