M65.8 - Other synovitis and tenosynovitis
M65.83 - Other synovitis and tenosynovitis, forearm
M65.831 - Other synovitis and tenosynovitis, right forearm
M65.832 - Other synovitis and tenosynovitis, left forearm
M65.839 - Other synovitis and tenosynovitis, unspecified forearm