What does a plus sign represent in CPT codes?

In the Current Procedural Terminology (CPT) coding system, a plus sign is specifically used to indicate an add-on code. Add-on codes are supplementary codes that provide additional information or describe additional procedures performed in conjunction with a primary service. These codes cannot stand alone; they are intended to be reported in addition to a primary procedure code.

For example, when a procedure is performed that includes additional components requiring extra attention or resources, the add-on code reflects this added complexity. The use of a plus sign provides a clear visual cue to coders that they need to include these supplementary codes along with the primary procedure, thus ensuring accurate billing and communication of services rendered.

The other options do not accurately represent the meaning of the plus sign in the CPT coding system. The plus sign does not denote an exemption related to add-on codes, it is not restricted to surgical codes only, and it does not indicate a requirement for prior authorization. Understanding this specific usage is crucial for proper coding practices and compliance within healthcare billing.