When billing CPT code 15783 (Dermabrasion), after a MOHS Surgery, to show that it is a medically necessary procedure, is the primary code used for the MOHS Surgery allowed to be used as the primary code for the Dermabrasion? Also, should a modifier 58 be applied? What is the best way to show (and get paid for) CPT 15783 is medically necessary and should not be denied as cosmetic? Please advise... THANKS!