What is a CPT modifier?

A modifier is a two-character code (letters or numbers) that gives extra information about the service performed. It’s added to the CPT code to clarify how the service was provided.

Example with Modifier 90837-95

90837 = 60-minute psychotherapy session

95 = Service was provided via telehealth

Modifiers are important because they help insurers process claims accurately especially when services are delivered in nontraditional ways (like virtual visits).