transitional pass-through payments {Ans: temporary additional payments (above the OPPS reimbursement rate) made for certain innovative medical devices, drugs, and biologicals provided to Medicare beneficiaries.}Medicare Pricing, Data Analysis, and Coding (PDAC) contractor {Ans: responsible for providing suppliers and manufacturers with assistance in determining HCPCS codes to be used; PDACs replaced SADMERCs (statistical analysis durable medical equipment regional carriers).}orthotics {Ans: branch of medicine that deals with the design and fitting of orthopedic (relating to bone disorders) devices (e.g., braces).}certificate of medical necessity (CMN) {Ans: prescription document for durable medical equipment, services, and supplies that is signed by the treating physician and submitted with the CMS-1500 claim to the DME MAC for reimbursement.}durable medical equipment (DME) {Ans: canes, crutches, walkers, commode chairs, blood glucose monitors, and so on.}durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS) {Ans: defined by Medicare as equipment that can withstand repeated use, is primarily used to serve a medical purpose, is used in the patient's home, and would not be used in the absence of illness or injury.}