What type of modifier should be used to indicate that multiple procedures were performed to prevent bundling?

The correct choice for indicating that multiple procedures were performed to prevent bundling is a Category 1 modifier. Category 1 modifiers are used to provide additional information about the procedure performed, which can include situations such as multiple procedures being completed during the same session. By appending the appropriate Category 1 modifier to the procedure code, healthcare providers can ensure proper reimbursement and avoid the issue of bundling, where multiple procedures are mistakenly considered a single procedure for billing purposes.

Modifiers such as those in Category 2, which track performance measures, or the unlisted service modifier, which is used for procedures not otherwise classified, do not specifically address the situation of multiple procedures. A global period modifier typically refers to the postoperative period associated with a surgical procedure, rather than indicating multiple procedures in a single encounter. Hence, Category 1 modifiers serve the specific purpose needed to clarify and appropriately bill for multiple procedures.