ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.9 > M65.94 M65.94 Unspecified synovitis and tenosynovitis, hand Non-Billable/Non-Specific Codes M65.941Unspecified synovitis and tenosynovitis, right handM65.942Unspecified synovitis and tenosynovitis, left handM65.949Unspecified synovitis and tenosynovitis, unspecified hand