Which component does CPT modifier TC indicate in a service?

• A. The professional component of a service
• B. The technical component of a service
• C. Both components of a service
• D. A separate service performed

Answer: (B)

Modifier TC denotes the technical component of a service—the part that involves the equipment, facility, and the technologist who performs the procedure. In scenarios like imaging, the technical component is the actual acquisition of the study, while the physician’s interpretation and report are the professional component, typically billed with a different modifier (26). If both components are provided, they can be billed separately: the technical portion with TC and the professional portion with 26. The other options describe the professional component, a combination, or a separate service, which aren’t what TC indicates.