ICD-10-CM > M00-M99 > M80-M85 > M85 > M85.8 > M85.83 M85.83 Other specified disorders of bone density and structure, forearm Non-Billable/Non-Specific Codes M85.831Other specified disorders of bone density and structure, right forearmM85.832Other specified disorders of bone density and structure, left forearmM85.839Other specified disorders of bone density and structure, unspecified forearm