Question: The podiatrist performed closed treatment of a sesamoid bone fracture in the patient’s right foot. Which CPT® code should I report for this procedure? California Subscriber Answer: You should report 28530 (Closed treatment of sesamoid fracture) for this procedure. Don’t miss: If the podiatrist performs open treatment of a sesamoid fracture, you should report 28531 (Open treatment of sesamoid fracture, with or without internal fixation). Sesamoid bones defined: Sesamoid bones are small, irregular bones present within a muscle tendon or capsule. In the foot, the most common location of a sesamoid bone is the underside of the ball of the foot under the great toe.