CMN stand for Certificate of Medical Neccesity also knows as DME,information form that is required to help with documents,all the medical necessity and others criteria for selected durable medical equipment,prosthetics,otthotics and supplies items,to a Medicare beneficiary. CMN contains sections A trough D. Section A and C are completed by the supplier and for section B and D are completed by the physician.The A DIF most be signed And completed by the supplier.And is not required the description or the cost of the equipment.Also the physician signature is not required. But in the case of some items and services billed to a DME MAC,the supplier need to signed the CMN from the physician or a DIF signed from the supplier.They need
