ICD-10-CM > M00-M99 > M20-M25 > M25 > M25.8 > M25.87 M25.87 Other specified joint disorders, ankle and foot Non-Billable/Non-Specific Codes M25.871Other specified joint disorders, right ankle and footM25.872Other specified joint disorders, left ankle and footM25.879Other specified joint disorders, unspecified ankle and foot