Does CPT code 76942 need a modifier?
Since the physician performs both biopsy in different encounter, you can billed the ultrasonic guidance for both with a XU modifier. While coding for physicians the medical coders can append 26 modifier with CPT code 76942 for diagnostic ultrasound.
CPT code 76942 (Ultrasonic guidance for needle placement imaging supervision and interpretation) and CPT code 77002 (fluoroscopic guidance for needle placement) are inclusive with injections/aspirations of joints, trigger points, tendons or cysts.