Question: What procedure and diagnosis codes should I use for the removal of a sacral nerve stimulator? Would it be the same code used for the initial implant or a different one? Illinois Subscriber Answer: For the procedure itself, choose 64595 (Revision or removal of peripheral or gastric neurostimulator pulse generator or receiver). Without knowing from the above question the reason for the removal of the stimulator, submit diagnosis Z45.49 (Encounter for adjustment and management of other implanted nervous system device).