M65.9 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Synovitis and tenosynovitis, unspecified.
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Unspecified synovitis and tenosynovitis, unspecified site
Unspecified synovitis and tenosynovitis, shoulder
Unspecified synovitis and tenosynovitis, upper arm
Unspecified synovitis and tenosynovitis, forearm
Unspecified synovitis and tenosynovitis, hand
Unspecified synovitis and tenosynovitis, thigh
Unspecified synovitis and tenosynovitis, lower leg
Unspecified synovitis and tenosynovitis, ankle and foot
Unspecified synovitis and tenosynovitis, other site
Unspecified synovitis and tenosynovitis, multiple sites
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