M65.321 Trigger finger, right index finger

Billable ICD-10-CM code, FY2026.

Applies from M65 Synovitis and tenosynovitis

Excludes1 (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.-)

Applies from M65.3 Trigger finger

Applicable to

• Nodular tendinous disease

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 727.03 Trigger finger (acquired) (approximate)

Code annotations containing back-references to M65.321

Back-references to M65.3

• Type 1 Excludes: M20.0 Deformity of finger(s) ("trigger finger (M65.3)")

Nearby codes

• M65.31 Trigger thumb
• M65.311 Trigger thumb, right thumb
• M65.312 Trigger thumb, left thumb
• M65.319 Trigger thumb, unspecified thumb
• M65.32 Trigger finger, index finger
• M65.321 Trigger finger, right index finger (this code)
• M65.322 Trigger finger, left index finger
• M65.329 Trigger finger, unspecified index finger
• M65.33 Trigger finger, middle finger
• M65.331 Trigger finger, right middle finger
• M65.332 Trigger finger, left middle finger