ICD-10-CM > M00-M99 > M65-M67 > M67 > M67.9 > M67.91 M67.91 Unspecified disorder of synovium and tendon, shoulder Non-Billable/Non-Specific Codes M67.911Unspecified disorder of synovium and tendon, right shoulderM67.912Unspecified disorder of synovium and tendon, left shoulderM67.919Unspecified disorder of synovium and tendon, unspecified shoulder