M65.10 Other infective (teno)synovitis, unspecified site

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.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 727.09 Other synovitis and tenosynovitis (approximate)

Code annotations containing back-references to M65.10

Back-references to M65.1

• Type 1 Excludes: M25.4 Effusion of joint ("other infective (teno)synovitis (M65.1-)")

Nearby codes

• M65.071 Abscess of tendon sheath, right ankle and foot
• M65.072 Abscess of tendon sheath, left ankle and foot
• M65.079 Abscess of tendon sheath, unspecified ankle and foot
• M65.08 Abscess of tendon sheath, other site
• M65.1 Other infective (teno)synovitis
• M65.10 Other infective (teno)synovitis, unspecified site (this code)
• M65.11 Other infective (teno)synovitis, shoulder
• M65.111 Other infective (teno)synovitis, right shoulder
• M65.112 Other infective (teno)synovitis, left shoulder
• M65.119 Other infective (teno)synovitis, unspecified shoulder
• M65.12 Other infective (teno)synovitis, elbow