What is the purpose of modifier -33?

The purpose of modifier -33 is to indicate that a preventive service has been performed. This modifier is used to inform payers that the service provided is aimed at preventing illness or medical conditions, aligning with guidelines established under the Affordable Care Act. When this modifier is appended to a procedure code, it ensures that the service can be appropriately recognized and reimbursed as preventive care, thus encouraging patients to utilize these services that contribute to overall health maintenance and wellness.

The other options provided address different scenarios. For example, separating pre- and post-operative care involves a different modifier that specifies the distinction in care levels; services related to anesthesia typically utilize distinct modifiers that pertain to anesthesia billing; and a distinct procedure performed would be addressed using other modifiers that describe additional or separate procedures from the main service offered. Each choice corresponds to specific billing situations, but only modifier -33 directly correlates to the performance of preventive services.