ICD-10-CM > M00-M99 > M20-M25 > M25 > M25.5 > M25.57 M25.57 Pain in ankle and joints of foot Non-Billable/Non-Specific Codes M25.571Pain in right ankle and joints of right footM25.572Pain in left ankle and joints of left footM25.579Pain in unspecified ankle and joints of unspecified foot