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M65.9

M65.9: Synovitis and tenosynovitis, unspecified

Non-billable headerICD-10-CM

M65.9 is a non-billable header ICD-10-CM code for synovitis and tenosynovitis, unspecified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M65.9

A category’s note binds every code beneath it.

Written on M65: Synovitis and tenosynovitis

  • chronic crepitant synovitis of hand and wrist (M70.0-)
  • current injury - see injury of ligament or tendon by body region
  • soft tissue disorders related to use, overuse and pressure (M70.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

  • deletedFY2024-FY2027

    Synovitis and tenosynovitis, unspecified

Code to one of these instead M65.9

10 child codes. Green means billable.

Other codes under M65

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.