M65 Header — not billable

Synovitis and tenosynovitis

Synovitis and tenosynovitis

M65 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.

Billable codes in this category

Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.

M65.4
Radial styloid tenosynovitis [de Quervain]

M65.4 identifies stenosing tenosynovitis of the first dorsal wrist compartment — specifically, inflammation and narrowing of the tendon sheath around the abductor pollicis longus and extensor pollicis brevis — clinically known as de Quervain's tenosynovitis.

Inclusion & exclusion notes

Excludes 1 (mutually exclusive — never code together)

  • 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.-)

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