Medical Billing Specialist — Role OverviewPrimary Duties. Prepare and submit insurance claims. (electronic or paper) to payers, such as Medicare, Medicaid, and private insurers. Verify patient insurance coverage. and obtain prior authorizations when necessary. Review medical documentation. and. assign appropriate diagnosis (ICD-10) and procedure (CPT/HCPCS) codes. Post payments and adjustments. to patient accounts. Follow up on unpaid or denied c...