ICD-10-CM > M00-M99 > M80-M85 > M85 > M85.4 > M85.45 M85.45 Solitary bone cyst, pelvis Non-Billable/Non-Specific Codes M85.451Solitary bone cyst, right pelvisM85.452Solitary bone cyst, left pelvisM85.459Solitary bone cyst, unspecified pelvis