ICD-10-CM > M00-M99 > M05-M14 > M12 > M12.8 > M12.87 M12.87 Other specific arthropathies, not elsewhere classified, ankle and foot Non-Billable/Non-Specific Codes M12.871Other specific arthropathies, not elsewhere classified, right ankle and footM12.872Other specific arthropathies, not elsewhere classified, left ankle and footM12.879Other specific arthropathies, not elsewhere classified, unspecified ankle and foot