Which modifier would be used to denote a service performed by a different provider during the same session?

• A. XS
• B. XE
• C. XP
• D. XU

Answer: (C)

The correct choice is the modifier that specifically indicates that a service was performed by a different provider during the same session. The use of the modifier is crucial for proper billing and coding in scenarios where multiple providers are involved in a patient's care at the same time.

This modifier clarifies to payers that the services, although happening in the same session, were distinct and provided by separate practitioners or teams. It ensures that the billing process reflects the complexity of the patient's care without causing any confusion regarding the roles of each provider.

Modifiers are designed to provide specific details to payers regarding the nature of the services rendered, and using the appropriate modifier allows for accurate reimbursement as well as easy auditing. In situations where two or more services overlap, identifying that they were performed by different providers is essential for maintaining clear medical records and for supporting claims in the event of an audit.