The 2012 CPT code changes bundle several procedures into combination codes, including CT angiography of the abdomen and pelvis, hepatobiliary imaging, pulmonary imaging codes, and various interventional radiology codes. New codes have been introduced for abdominal paracentesis, peritoneal lavage, placement and removal of vena cava filters, and renal angiography that now include all catheter placement and imaging guidance. Approximately 15-20 current CPT codes also have text or description revisions to improve clarity.