ICD-10-CM > M00-M99 > M20-M25 > M24 > M24.6 > M24.67 M24.67 Ankylosis, ankle and foot Non-Billable/Non-Specific Codes M24.671Ankylosis, right ankleM24.672Ankylosis, left ankleM24.673Ankylosis, unspecified ankleM24.674Ankylosis, right footM24.675Ankylosis, left footM24.676Ankylosis, unspecified foot