ICD-10 M23.229
Billable / SpecificDerangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee
About ICD-10-CM M23.229
ICD-10-CM code M23.229 represents Derangement of posterior horn of medial meniscus due to old tear or injury, unspecified knee. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M23). The 2026 edition of ICD-10-CM M23.229 became effective on October 1, 2025.
Medicare LCD Coverage for M23.229
Local Coverage Determinations (LCDs) from CMS MACs that list M23.229 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 M23.229.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but M23.229 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with M23.229
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 29881 Knee arthroscopy meniscectomy — meniscal tears medial/lateral, bucket handle tear, acute meniscal injury Orthopedics
Convert M23.229 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 |
|---|---|---|
| M23.229 | 7172 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M23.229
Other codes in section M20-M25 (Other joint disorders).
ICD-10 M23.229, Billing FAQ
Is ICD-10 code M23.229 billable? +
Yes, M23.229 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What CPT codes are commonly billed with M23.229? +
Procedures frequently paired with M23.229 include: 29881.
What ICD-9 codes does M23.229 map to? +
Per CMS GEMs, M23.229 maps to ICD-9 codes: 7172. 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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