What modifier indicates a procedure was performed on an unusual site?

Modifier 22 is used when reporting an increased procedural service. It indicates that the complexity or time of a procedure was greater than what is typically required, which can sometimes occur when a procedure is performed on an unusual site. This modifier provides additional information to payers about why the usual fee is increased due to the unique circumstances involved in the procedure.

Using this modifier helps healthcare providers communicate that special considerations are involved, necessitating additional reimbursement. In contrast, other modifiers listed, such as Modifier 50 (bilateral procedure), Modifier 25 (significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure), and Modifier 57 (decision for surgery), serve different purposes and are not specifically designed to indicate a procedure performed at an unusual site. These modifiers would not accurately reflect the circumstances leading to the increased complexity associated with the procedure.