ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.9 > M65.92 M65.92 Unspecified synovitis and tenosynovitis, upper arm Non-Billable/Non-Specific Codes M65.921Unspecified synovitis and tenosynovitis, right upper armM65.922Unspecified synovitis and tenosynovitis, left upper armM65.929Unspecified synovitis and tenosynovitis, unspecified upper arm