Colorado Subscriber
Answer: You may be tempted to use 33214 (Upgrade of implanted pacemaker system, conversion of single-chamber system to dual-chamber system [includes removal of previously placed pulse generator, testing of existing lead, insertion of new lead, insertion of new pulse generator]), but the AMA suggests otherwise. The AMA gave the following guidance in 2003 for the situation you describe: You should use "code 33233 (Removal of permanent pacemaker pulse generator) ... for the removal of the existing pulse generator."
Moreover, the AMA advises that when the physician removes "the old atrial electrode," you may report this separately with code 33235 (Removal of transvenous pacemaker electrode[s]; dual-lead system). If the physician replaces both the generator and the atrial electrode, you should report 33206 (Insertion or replacement of permanent pacemaker with transvenous electrode[s]; atrial). The AMA further instructs that you should use "code 71090 (Insertion pacemaker, fluoroscopy and radiography, radiological supervision and interpretation) for the radiological supervision and interpretation portion of the procedure."