ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.9 > M65.96 M65.96 Unspecified synovitis and tenosynovitis, lower leg Non-Billable/Non-Specific Codes M65.961Unspecified synovitis and tenosynovitis, right lower legM65.962Unspecified synovitis and tenosynovitis, left lower legM65.969Unspecified synovitis and tenosynovitis, unspecified lower leg