ICD-10-CM > M00-M99 > M70-M79 > M71 > M71.4 > M71.47 M71.47 Calcium deposit in bursa, ankle and foot Non-Billable/Non-Specific Codes M71.471Calcium deposit in bursa, right ankle and footM71.472Calcium deposit in bursa, left ankle and footM71.479Calcium deposit in bursa, unspecified ankle and foot