What does the plus sign (+) indicate when found before a CPT code?

The presence of a plus sign (+) before a CPT code signifies that it is an add-on code. Add-on codes are used in conjunction with a primary procedure and are intended to provide additional specificity for services performed. They are not meant to stand alone, meaning that an add-on code can only be billed with a specified primary procedure code. This system allows for more comprehensive billing where certain procedures, often more complex or time-consuming, require additional reporting to accurately reflect the services provided.

Understanding the role of add-on codes is crucial for appropriate coding and billing practices, as they ensure that healthcare providers are adequately compensated for multiple procedures performed during a single patient encounter. This coding structure helps to transparently communicate the full scope of services delivered to patients.