Which modifier indicates a service performed by multiple providers?

The correct answer reflects the use of a modifier to indicate a service performed by multiple providers. Specifically, Modifier 99 is used to denote that multiple modifiers are being used to describe a procedure or service. This is particularly important in situations where a procedure requires coordination among providers or when different aspects of care are completed by specialists, ensuring that each aspect of care is being appropriately accounted for in the billing process.

Modifier 99 allows healthcare providers to convey that the complexity or nuances of a service require more than one modifier to capture all aspects of the care provided, which can be critical for accurate coding and reimbursement.

In contrast, the other modifiers listed do not serve this specific purpose; for example, Modifier 50 denotes bilateral procedures, Modifier 22 indicates increased procedural services, and Modifier 75 is not a standard HCPCS modifier. Understanding these distinctions is essential for proper coding and billing practices within the healthcare system.