TC HCPCS - 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; HOWEVER, PORTABLE X-RAY SUPPLIERS ONLY BILL FOR TECHNICAL COMPONENT AND SHOULD UTILIZE MODIFIER TC; THE CHARGE DATA FROM PORTABLE X-RAY SUPPLIERS WILL THEN BE USED TO BUILD CUSTOMARY AND PREVAILING PROFILES