What is a key characteristic of add-on codes?

Add-on codes are specifically designed to enhance primary procedure codes by providing additional information that describes distinct services or procedures performed in conjunction with the primary service. They do not stand alone; rather, they are meant to be used alongside a primary code to further detail what was done during a medical procedure. This characteristic allows healthcare providers to capture comprehensive details of the services provided, ensuring accurate billing and better representation of the patient's care.

The essence of add-on codes is to complement primary codes rather than serve as standalone procedures or to replace basic codes, which are used to represent services on their own. They are also not mandatory, meaning their usage depends on the specifics of the service rendered and the coding guidelines. The focus on enhancing primary procedures helps improve clarity and communication regarding the complexity and breadth of the services provided.