Perform all duties at the Outpatient Lab front desk including but not limited to greeting the patient, placing lab orders in the laboratory information system, check tests ordered and diagnosis for medical necessity, deliver ABN (advance beneficiary notice) to patient when applicable, and make necessary phone calls to physician offices for clarification of orders. The Central Processing Assistant is responsible for performing EKGs using the GE EKG carts and MUSE software program and for performing patient registration functions and insurance verification on outpatients.