I code for a group of Oral Surgeons who use both Medical and Dental procedures to treat patients. Usually, these procedures are easily differentiated (dental CDT codes billed to dental insurance and Medical CPT codes billed to medical insurance.) However, there are some specific circumstances in which there are medical benefits for dental procedures. Namely, the surgical removal of teeth prior to radiation therapy to treat an active cancer diagnosis. In the past we have been taught to submit these claims to Medicare with each tooth extraction (D7210) a separate line on the claim using modifier 51 for all but the first line. We would receive an initial denial for duplication. Once appealed, they would correctly process and pay the claim. Recently, we got a suggestion from a Medicare representative to bill the extraction (D7210) as a single line on the claim and adjust the units to reflect how many teeth were removed with no modifier. We tried it and it was paid without the usual denial-appeal process. I am looking for confirmation on which submission is best practice.