In coding, what does a plus sign symbol represent?

The plus sign symbol in coding specifically indicates that the code is an add-on code. Add-on codes are used to report additional services that are provided in conjunction with a primary procedure. They are not standalone codes; instead, they must be used alongside the primary procedure code to fully capture the scope of the services rendered. This allows for a more accurate representation of the complete service provided to the patient.

In the context of medical billing and coding, understanding the significance of the plus sign is crucial for proper code selection and ensuring that all services rendered are correctly billed, which can impact reimbursement. The use of add-on codes helps to clarify that these services enhance or support the primary procedure, thereby fostering clarity and precision in billing practices.