15823 (Blepharoplasty) & 67904 (Ptosis repair) performed at Ambulatory Surgery Center. NCCI PTP Edits state we can bill only one. Medicare allows more for the 67904 and less for 15823 for the surgeon. It is the opposite for the ASC. Can each one bill the higher allowed CPT? and would you go by the surgeons higher reimbursement or the ASC? Does anyone know where I can find this Medicare policy?