Skip to content
Dx

ICD-10-CM 2027

ICD-10 code for forearm synovitis

M65.93

Unspecified synovitis and tenosynovitis, forearm

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Synovitis › forearm”. Page updated September 29, 2026.

About coding forearm synovitis

The ICD-10-CM code for forearm synovitis is M65.93 (Unspecified synovitis and tenosynovitis, forearm).

Within M65.9 (synovitis and tenosynovitis, unspecified), M65.93 is specifically for unspecified synovitis and tenosynovitis, forearm. Related codes cover unspecified site (M65.90), shoulder (M65.91), upper arm (M65.92), hand (M65.94), thigh (M65.95), lower leg (M65.96), ankle and foot (M65.97), other site (M65.98) and 1 more.

To report this condition, pick the subcode that matches the documentation: M65.931 (forearm), M65.932 (forearm) and M65.939 (forearm).

It was added in FY2025, effective October 1, 2024.

Common questions about forearm synovitis ICD-10 codes

What is the ICD-10 code for forearm synovitis?

M65.93 — Unspecified synovitis and tenosynovitis, forearm (a header code; report a more specific subcode).

Is M65.93 billable?

No. M65.93 is a header code. Report one of its more specific subcodes instead.