Hi Guest! 21031 – Excision of torus mandibularis Yes I don”t show that the modifier 50 for bilateral procedure is necessary for this code, although some medical insurers may accept it. Since the description specifies location as mandible, no need for bilateral since there is only 1 mandible in the body! If the procedure was more involved/difficult/extensive than the norm, you may instead consider modifier 22 for “increased procedural service” Hope this helps!