The immediate, initial chest x-ray after thoracentesis is bundled and should not be coded according to CMS. Just like the immediate, initial chest x-ray after central venous catheter placement. Others before or after for medically necessary reasons could be coded with -59.
NCCI Policy Manual effective January 1, 2012 (though the edits are already in place):
9. When a central venous catheter is inserted, a chest
radiologic examination is usually performed to confirm the position of the catheter and absence of pneumothorax. Similarly when an emergency endotracheal intubation procedure (CPT code 31500), chest tube insertion procedure (e.g., CPT codes 32422, 32550, 32551), or insertion of a central flow directed catheter procedure (e.g., Swan Ganz)(CPT code 93503) is performed, a chest radiologic examination is usually performed to confirm the location and proper positioning of the tube or catheter. The chest radiologic examination is integral to the procedures, and a chest radiologic examination (e.g., CPT codes 71010, 71020) should not be reported separately.