Append modifier 26 to indicate professional services whether in an office, inpatient or outpatient setting. Submit global services on one line. Do not append a modifier when submitting claims for global services; providers should only bill globally when they have performed the imaging service and the interpretation in an office setting. Append modifier 50 (bilateral procedure) to bilateral surgical procedure code(s) that require the use of a modifier except for Ambulatory Surgery Centers (ASCs). To report bilateral procedures furnished in ASCs, review this article. Submit bilateral surgical procedure code(s) on one claim line/service line with one unit. Append modifier 51 (multiple procedures) to all surgical procedures that are billed in addition to the primary surgical procedure. For more information on modifiers please access Medicare Claim Processing Manual 
. Review questions and answers pertaining to modifiers.
