Ask Dr. Z

When a needle biopsy is ordered of an organ because of an abnormal finding on some previous radiology work, an IR doc uses ultrasonic guidance or CT guidance to try and locate the area of suspicion but these images either show no abnormality or abnormality has reduced in size and therefore a biopsy isn't performed, what do you charge for the radiologic imaging performed? do you code the guidance code with a -52 or if there is a limited modality code such as US abdomen limited or the limited CT code 76380?