Which symbol identifies codes that are exempt from the multiple procedure rule?

The correct choice is the forbidden symbol, which is specifically used in coding to indicate that certain codes are exempt from the multiple procedure rule. In coding practices, particularly in the context of outpatient services, the multiple procedure rule applies to the billing of certain services when multiple procedures are performed during the same session. The forbidden symbol signals to coders that these specific procedures do not adhere to the restrictions imposed by the multiple procedure rule, meaning they can be billed separately without a reduction in reimbursement.

Understanding the significance of this symbol and its application is crucial for accurate coding and billing practices. It highlights the importance of properly identifying services that may be subject to different billing rules, ensuring that healthcare providers receive appropriate reimbursements for their services.