Defining Modifier 26 and Modifier TC
Modifier 26 (Professional Component): Certain procedures are a combination of a physician component and a technical component. When the physician component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
Modifier TC (Technical Component): Under certain circumstances, a charge may be made for the technical component alone. Under those circumstances, the technical component charge is identified by adding modifier TC to the usual procedure number. Technical component charges are institutional charges and not billed separately by physicians.