Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); lumbar or sacral, each additional facet joint (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Paravertebral facet joints, also known as zygapophyseal joints, are critical structures located on the posterior aspect of the spine, situated on each side of the vertebrae where one vertebra overlaps another. These joints play a significant role in spinal movement and stability. The procedure described by CPT® Code 64636 involves the destruction of the paravertebral facet joint nerve(s) using a neurolytic agent, which is guided by imaging techniques such as fluoroscopy or computed tomography (CT). This intervention is typically performed to alleviate pain associated with conditions affecting the lumbar or sacral regions of the spine. The process begins with the preparation of the skin over the facet joint, followed by the administration of a local anesthetic to minimize discomfort during the procedure. A spinal needle is then carefully directed into the facet joint space, and contrast material is injected to confirm the correct positioning of the needle. Once the needle is accurately placed, a neurolytic agent is injected to destroy the nerve pathway, which may include substances like phenol, ethyl alcohol, glycerol, ammonium salt compounds, or hypertonic solutions. Additionally, thermal or electrical modalities may be employed, where a probe or electrode is used to generate heat that effectively destroys the targeted nerve tissue. This procedure is performed for each additional lumbar or sacral facet joint nerve, and it is important to note that CPT® Code 64636 is used in conjunction with the primary procedure code for accurate billing and documentation.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 64636 is indicated for patients experiencing pain related to conditions affecting the lumbar or sacral facet joints. This may include:

  • Chronic low back pain - Persistent pain in the lower back that may be due to degenerative changes or injury affecting the facet joints.
  • Facet joint syndrome - A condition characterized by inflammation or irritation of the facet joints, leading to pain and discomfort.
  • Radiculopathy - Pain that radiates along the nerve pathways due to nerve compression or irritation, which may be alleviated by targeting the facet joint nerves.

2. Procedure

The procedure for CPT® Code 64636 involves several critical steps to ensure effective destruction of the paravertebral facet joint nerve(s). The following steps outline the process:

  • Preparation of the skin - The area over the facet joint is cleaned and sterilized to reduce the risk of infection.
  • Administration of local anesthetic - A local anesthetic is injected to numb the area, ensuring patient comfort during the procedure.
  • Needle insertion - A spinal needle is carefully directed into the facet joint space. The physician advances the needle until bone or cartilage is encountered, indicating the correct location.
  • Contrast material injection - A small amount of contrast material is injected through the needle to confirm proper positioning within the facet joint space.
  • Injection of neurolytic agent - Once the needle is confirmed to be in the correct position, a neurolytic agent is injected along the nerve pathway to destroy the nerve tissue. This agent may include phenol, ethyl alcohol, glycerol, or other chemical solutions.
  • Thermal or electrical neurolysis (if applicable) - In some cases, a probe or electrode may be introduced through the skin and advanced toward the targeted neural tissue. The device is connected to a generator, which is used to perform motor and sensory testing to ensure accurate placement. Once the correct nerve pathway is identified, the device is activated to generate heat, effectively destroying the targeted nerve tissue.

3. Post-Procedure

After the procedure, patients may experience some discomfort at the injection site, which is typically managed with over-the-counter pain relief medications. It is essential for patients to follow any specific post-procedure care instructions provided by their healthcare provider. Recovery time may vary, but many patients can resume normal activities within a few days. Monitoring for any adverse reactions or complications is crucial, and patients should be advised to report any unusual symptoms, such as increased pain or signs of infection, to their healthcare provider promptly.

Short Descr DESTROY L/S FACET JNT ADDL
Medium Descr DSTR NROLYTC AGNT PARVERTEB FCT ADDL LMBR/SACRAL
Long Descr Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); lumbar or sacral, each additional facet joint (List separately in addition to code for primary procedure)
Status Code Active Code
Global Days ZZZ - Code Related to Another Service
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 4
CCS Clinical Classification 9 - Other OR therapeutic nervous system procedures

This is an add-on code that must be used in conjunction with one of these primary codes.

64635 Resequenced Code MPFS Status: Active Code APC J1 ASC G2 Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); lumbar or sacral, single facet joint
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
RT Right side (used to identify procedures performed on the right side of the body)
LT Left side (used to identify procedures performed on the left side of the body)
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
SG Ambulatory surgical center (asc) facility service
GC This service has been performed in part by a resident under the direction of a teaching physician
KX Requirements specified in the medical policy have been met
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
GA Waiver of liability statement issued as required by payer policy, individual case
X2 Continuous/focused services: for reporting services by clinicians whose expertise is needed for the ongoing management of a chronic disease or a condition that needs to be managed and followed with no planned endpoint to the relationship; reporting clinician service examples include but are not limited to: a rheumatologist taking care of the patient's rheumatoid arthritis longitudinally but not providing general primary care services
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
AG Primary physician
GZ Item or service expected to be denied as not reasonable and necessary
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
CR Catastrophe/disaster related
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
GW Service not related to the hospice patient's terminal condition
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
24 Unrelated evaluation and management service by the same physician or other qualified health care professional during a postoperative period: the physician or other qualified health care professional may need to indicate that an evaluation and management service was performed during a postoperative period for a reason(s) unrelated to the original procedure. this circumstance may be reported by adding modifier 24 to the appropriate level of e/m service.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
57 Decision for surgery: an evaluation and management service that resulted in the initial decision to perform the surgery may be identified by adding modifier 57 to the appropriate level of e/m service.
73 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure prior to the administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may cancel a surgical or diagnostic procedure subsequent to the patient's surgical preparation (including sedation when provided, and being taken to the room where the procedure is to be performed), but prior to the administration of anesthesia (local, regional block(s) or general). under these circumstances, the intended service that is prepared for but cancelled can be reported by its usual procedure number and the addition of modifier 73. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
74 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure after administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may terminate a surgical or diagnostic procedure after the administration of anesthesia (local, regional block(s), general) or after the procedure was started (incision made, intubation started, scope inserted, etc). under these circumstances, the procedure started but terminated can be reported by its usual procedure number and the addition of modifier 74. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
95 Synchronous telemedicine service rendered via a real-time interactive audio and video telecommunications system: synchronous telemedicine service is defined as a real-time interaction between a physician or other qualified health care professional and a patient who is located at a distant site from the physician or other qualified health care professional. the totality of the communication of information exchanged between the physician or other qualified health care professional and the patient during the course of the synchronous telemedicine service must be of an amount and nature that would be sufficient to meet the key components and/or requirements of the same service when rendered via a face-to-face interaction. modifier 95 may only be appended to the services listed in appendix p. appendix p is the list of cpt codes for services that are typically performed face-to-face, but may be rendered via a real-time (synchronous) interactive audio and video telecommunications system.
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CG Policy criteria applied
ER Items and services furnished by a provider-based, off-campus emergency department
F8 Right hand, fourth digit
FA Left hand, thumb
GS Dosage of erythropoietin stimulating agent has been reduced and maintained in response to hematocrit or hemoglobin level
GT Via interactive audio and video telecommunication systems
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GX Notice of liability issued, voluntary under payer policy
KK Dmepos item subject to dmepos competitive bidding program number 2
KT Beneficiary resides in a competitive bidding area and travels outside that competitive bidding area and receives a competitive bid item
KV Dmepos item subject to dmepos competitive bidding program that is furnished as part of a professional service
KY Dmepos item subject to dmepos competitive bidding program number 5
LR Laboratory round trip
MG The order for this service does not have applicable appropriate use criteria in the qualified clinical decision support mechanism consulted by the ordering professional
PN Non-excepted service provided at an off-campus, outpatient, provider-based department of a hospital
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
PT Colorectal cancer screening test; converted to diagnostic test or other procedure
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
QZ Crna service: without medical direction by a physician
SA Nurse practitioner rendering service in collaboration with a physician
T3 Left foot, fourth digit
TL Early intervention/individualized family service plan (ifsp)
TR School-based individualized education program (iep) services provided outside the public school district responsible for the student
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
Date
Action
Notes
2020-01-01 Changed Guideline revision per AMA Errata posted 2020-07-01.
2012-01-01 Added Added
Code
Description
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"