M65.9
Non-billableSynovitis and tenosynovitis, unspecified
M65.9 is the ICD-10-CM code for Synovitis and tenosynovitis, unspecified. It is a non-billable category code — use a more specific child code such as M65.90 for billing.
M00-M99 Diseases of the musculoskeletal system and connective tissue
No additional coding notes for this code.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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