ICD-10-CM > M00-M99 > M20-M25 > M20 > M20.4 M20.4 Other hammer toe(s) (acquired) Non-Billable/Non-Specific Codes M20.40Other hammer toe(s) (acquired), unspecified footM20.41Other hammer toe(s) (acquired), right footM20.42Other hammer toe(s) (acquired), left foot