Summary & Overview
CPT 64636: Lumbar/Sacral Facet Joint Neurolysis, Additional Level
CPT code 64636 is an add-on code for image-guided neurolytic destruction of a lumbar or sacral facet joint nerve at an additional level beyond an initial, separately reported facet joint neurolytic injection. The procedure uses heat, electrical current, or chemical agents and requires imaging guidance such as fluoroscopy or CT. This code matters nationally because lumbar and sacral facet denervation procedures are common components of interventional pain management for axial back pain, and accurate coding affects procedure reporting, payment bundling, and utilization monitoring.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical intent of the code, typical sites of service, common modifiers listed with the code, and national policy considerations affecting add-on reporting and imaging guidance. The publication also summarizes expected billing context — that 64636 is used only when an additional facet level is treated after a separately reportable initial level — and highlights areas where payers commonly apply medical necessity reviews or documentation requirements.
This summary guides clinicians, coding professionals, and policy analysts through the essential clinical and billing characteristics of CPT code 64636, clarifying when the add-on code is reported and what operational settings typically deliver the service. Data not available in the input will be noted in relevant sections.
Billing Code Overview
CPT code 64636 describes an add-on neurolytic procedure in which the provider destroys the facet joint nerve of a lumbar or sacral spinal segment using heat, electric current, or a chemical agent. The procedure is performed with imaging guidance (fluoroscopy or CT) and is reported in addition to a separately reportable single facet joint neurolytic injection when an additional facet joint level is treated.
Service type: Image-guided lumbar/sacral facet joint neurolytic injection (add-on level).
Typical site of service: Ambulatory surgery center or hospital outpatient setting; interventional pain clinic with imaging capability.
Clinical & Coding Specifications
Clinical Context
A 52-year-old patient with chronic axial low back pain and confirmed lumbar facet arthropathy presents for lumbar medial branch neurotomy (radiofrequency ablation) at multiple contiguous levels. Conservative care including physical therapy, medications, and diagnostic medial branch blocks provided temporary pain relief. The interventional pain physician schedules image-guided neurolytic destruction of the facet joint nerves. The procedure is performed in an ambulatory surgery center or hospital outpatient department under conscious sedation or monitored anesthesia care. The provider uses fluoroscopic guidance to place radiofrequency probes at the targeted lumbar or sacral medial branch nerves. After the initial single-level neurolytic injection is reported, the provider treats an additional adjacent facet joint level and reports the add-on code 64636. Standard pre-procedure verification, informed consent, sterile technique, and post-procedure recovery with neurovascular and pain assessments are performed. Documentation includes levels treated, imaging guidance used, type of neurolytic agent (thermal radiofrequency), procedure time, any complications, and anesthesia services.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Data not available in the input. | Data not available in the input. |