M65.821 Other synovitis and tenosynovitis, right upper arm

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)

Nearby codes

• M65.81 Other synovitis and tenosynovitis, shoulder
• M65.811 Other synovitis and tenosynovitis, right shoulder
• M65.812 Other synovitis and tenosynovitis, left shoulder
• M65.819 Other synovitis and tenosynovitis, unspecified shoulder
• M65.82 Other synovitis and tenosynovitis, upper arm
• M65.821 Other synovitis and tenosynovitis, right upper arm (this code)
• M65.822 Other synovitis and tenosynovitis, left upper arm
• M65.829 Other synovitis and tenosynovitis, unspecified upper arm
• M65.83 Other synovitis and tenosynovitis, forearm
• M65.831 Other synovitis and tenosynovitis, right forearm
• M65.832 Other synovitis and tenosynovitis, left forearm