Summary & Overview
CPT 64590: Insertion or Replacement of Implantable Neurostimulator Pulse Generator
CPT code 64590 describes the surgical insertion or replacement of an implantable pulse generator or receiver for peripheral, sacral, or gastric neurostimulation systems that require a surgically created pocket and a connection to an electrode array. This code captures a high-complexity implant procedure used in neuromodulation therapies for pain management, sacral modulation for bladder and bowel dysfunction, and gastric stimulation for select motility disorders. Nationally, the code is important for tracking utilization of advanced implantable neuromodulation procedures and for aligning surgical billing with device implantation protocols.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find benchmarks for common payer coverage approaches, summaries of clinical context for when implantation or replacement is billed, and notes on coding scope and service setting. The publication outlines typical sites of service and the procedural intent captured by the code, and it highlights areas where payer policies commonly address medical necessity, prior authorization, and device replacement timing. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 64590 describes the surgical insertion or replacement of a neurostimulator pulse generator or receiver for peripheral, sacral, or gastric stimulation. The procedure applies to systems that require a surgically created subcutaneous or submuscular pocket for the pulse generator or receiver and that require a connection between the implanted electrode array and the pulse generator or receiver.
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Service type: Implantable neurostimulator pulse generator insertion or replacement
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Typical site of service: Hospital operating room or ambulatory surgery center for placement of a surgically created pocket and connection to an electrode array
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient with chronic, refractory neuropathic pain of the lower extremities elects to have a peripheral nerve stimulator pulse generator replaced due to battery depletion and pocket erosion. The patient presents to an outpatient ambulatory surgery center after preoperative evaluation by a pain management specialist and medical clearance by primary care. On the day of service the patient receives general endotracheal anesthesia. The surgeon reopens the previously created subcutaneous pocket, disconnects the existing pulse generator from the implanted lead array, removes the depleted device, inspects leads and connections for integrity, places a new generator in the surgically created pocket, and securely connects the lead array. Hemostasis is confirmed and the incision is closed in layers. Postoperative recovery includes device interrogation and programming by the implanting team prior to discharge. Typical documentation includes indication for replacement, operative note detailing pocket creation or reopening, device model and serial numbers, lead status, anesthesia record, and device programming/verification notes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal, pre-existing physician service | When reporting the primary surgeon’s usual professional service for the procedure |
22 |