ICD-10-CM > M00-M99 > M70-M79 > M71 > M71.4 > M71.46 M71.46 Calcium deposit in bursa, knee Non-Billable/Non-Specific Codes M71.461Calcium deposit in bursa, right kneeM71.462Calcium deposit in bursa, left kneeM71.469Calcium deposit in bursa, unspecified knee