M65.939
ICD-10-CMThis code represents inflammation of the synovial membrane (synovitis) or the tendon sheath (tenosynovitis) in an unspecified forearm. It indicates a general inflammatory process affecting these structures without further specification of the cause or precise location within the forearm.
Use this code when documentation clearly indicates synovitis or tenosynovitis of the forearm, but the specific etiology (e.g., infectious, traumatic, autoimmune) is not identified, and the laterality (left or right) is also not specified. This code is appropriate when the provider's diagnosis is broad and lacks the detail for more specific codes.
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