Does Medicare Require A CMN For CPAP? 
For treatment of sleep apnea Medicare does require a CMN -LRB- certficate of medical need -RRB- form to be completed by your doctor . The patient must have seen a doctor prior to the sleep study test . The patient must have completed a Medicare approved sleep study test The patient must have had training fomr the CPAP provider on the use and care of the machine 