ICD-10-CM > M00-M99 > M65-M67 > M67 > M67.9 > M67.97 M67.97 Unspecified disorder of synovium and tendon, ankle and foot Non-Billable/Non-Specific Codes M67.971Unspecified disorder of synovium and tendon, right ankle and footM67.972Unspecified disorder of synovium and tendon, left ankle and footM67.979Unspecified disorder of synovium and tendon, unspecified ankle and foot