ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.9 > M65.95 M65.95 Unspecified synovitis and tenosynovitis, thigh Non-Billable/Non-Specific Codes M65.951Unspecified synovitis and tenosynovitis, right thighM65.952Unspecified synovitis and tenosynovitis, left thighM65.959Unspecified synovitis and tenosynovitis, unspecified thigh