Per CPT Assistant~
"This instruction refers to the circumstance where a pulse generator is removed and the same generator is reinserted. For example, the pulse generator is removed due to disconnection of the lead(s), the lead(s) are reconnected, and the same generator is reinserted. Another example is in the event the generator is resting on the pelvic rim and is moved due to pain. In these two specific circumstances, the work is considered revision of an existing generator so only code 63688, Revision or removal of implanted spinal neurostimulator pulse generator or receiver, should be reported. It would not be appropriate to report code 63688 for removal of the generator in addition to code 63685, Insertion or replacement of spinal neurostimulator pulse generatoror receiver, direct or inductive coupling, to describe reinsertion of the same generator. To further clarify, code 63688 may also be reported independently, for example, in the event of infection or because a satisfactory response to treatment has not been achieved. In this circumstance, for removal of the lead array, code 63660, Revision or removal of spinal neurostimulator electrode percutaneous array(s) or plate/paddle(s),should also be reported."