ICD-10 M17.31
Billable / SpecificUnilateral post-traumatic osteoarthritis, right knee
About ICD-10-CM M17.31
ICD-10-CM code M17.31 represents Unilateral post-traumatic osteoarthritis, right knee. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M17). The 2026 edition of ICD-10-CM M17.31 became effective on October 1, 2025.
Medicare LCD Coverage for M17.31
Local Coverage Determinations (LCDs) from CMS MACs that list M17.31 as a covered diagnosis.
Showing top 10 of 494 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M17.31.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with M17.31
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 27447 Total knee arthroplasty — osteoarthritis Orthopaedic Surgery
- 27446 Revision knee arthroplasty — failed TKA, mechanical loosening, component failure Orthopedics
- J7322 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7320 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7327 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7321 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7326 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7325 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7332 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7329 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
Convert M17.31 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 |
|---|---|---|
| M17.31 | 71526 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M17.31
Other codes in section M15-M19 (Osteoarthritis).
ICD-10 M17.31, Billing FAQ
Is ICD-10 code M17.31 billable? +
Yes, M17.31 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 M17.31? +
Procedures frequently paired with M17.31 include: 27447, 27446, J7322, J7320, J7327.
What ICD-9 codes does M17.31 map to? +
Per CMS GEMs, M17.31 maps to ICD-9 codes: 71526. 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 July 16, 2026.
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