ICD-10-CM > M00-M99 > M05-M14 > M11 > M11.1 > M11.17 M11.17 Familial chondrocalcinosis, ankle and foot Non-Billable/Non-Specific Codes M11.171Familial chondrocalcinosis, right ankle and footM11.172Familial chondrocalcinosis, left ankle and footM11.179Familial chondrocalcinosis, unspecified ankle and foot