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Official Description

Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral; second level (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 either side of the vertebrae where one vertebra overlaps another. These joints play a significant role in spinal movement and stability. Pain in the facet joints can arise from various conditions, including post-laminectomy syndrome, which may occur after spinal surgery due to destabilization of the spinal joints, formation of scar tissue, or recurrent disc herniation. Other potential causes of facet joint pain include degenerative conditions such as spondylosis, spondylolisthesis, and arthritis. To address this pain, a procedure involving the injection of a diagnostic or therapeutic agent into the facet joint or the nerves that innervate the joint is performed. This procedure is conducted with the aid of imaging guidance, specifically fluoroscopy or computed tomography (CT), to ensure accurate placement of the injection. Initially, the skin over the facet joint is prepared, and a local anesthetic is administered to minimize discomfort. A spinal needle is then carefully directed into the facet joint space until it contacts bone or cartilage. To confirm the correct positioning of the needle, a small amount of contrast material is injected. Following this verification, a local anesthetic and/or steroid is injected into the joint. The diagnostic facet joint injection primarily utilizes a local anesthetic to pinpoint the specific source of pain. If the patient experiences significant pain relief after this diagnostic injection, a therapeutic injection may be performed on a subsequent date, utilizing a long-acting local anesthetic combined with a steroid for prolonged relief. For coding purposes, a single lumbar or sacral facet joint injection is represented by 64493, while the second level is coded as 64494, and the third and any additional levels are coded as 64495.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Facet joint injections are indicated for various conditions that may cause pain in the lumbar or sacral regions. The following are explicitly provided indications for this procedure:

  • Post-Laminectomy Syndrome - Pain that persists following spinal surgery, often due to destabilization of spinal joints or scar tissue formation.
  • Recurrent Disc Herniation - Pain resulting from the reoccurrence of a herniated disc affecting the facet joints.
  • Spondylosis - Degenerative changes in the spine that can lead to pain in the facet joints.
  • Spondylolisthesis - A condition where one vertebra slips over another, potentially causing facet joint pain.
  • Arthritis - Inflammation of the facet joints due to arthritic conditions can lead to significant discomfort.

2. Procedure

The procedure for performing a paravertebral facet joint injection involves several critical steps to ensure accuracy and patient safety. The following procedural steps are outlined:

  • Step 1: Preparation - The skin over the targeted facet joint is thoroughly cleaned and prepared to minimize the risk of infection. A local anesthetic is then injected to numb the area, ensuring the patient experiences minimal discomfort during the procedure.
  • Step 2: Needle Insertion - A spinal needle is carefully inserted into the facet joint space. The physician directs the needle until it makes contact with bone or cartilage, which indicates that the needle is in the correct position.
  • Step 3: Contrast Injection - To confirm the accurate placement of the needle, a small amount of contrast material is injected. This step is crucial as it allows the physician to visualize the needle's position within the joint using fluoroscopy or CT imaging.
  • Step 4: Injection of Therapeutic Agent - Once the needle position is verified, a local anesthetic and/or steroid is injected into the facet joint. This injection aims to provide pain relief and may also help in diagnosing the source of pain based on the patient's response.

3. Post-Procedure

After the facet joint injection, patients are typically monitored for a short period to assess their response to the procedure and to ensure there are no immediate complications. It is common for patients to experience some soreness at the injection site, which may resolve within a few days. Patients may be advised to avoid strenuous activities for a short period following the injection to allow for optimal recovery. If the diagnostic injection provides significant pain relief, a therapeutic injection may be scheduled for a later date, utilizing a long-acting local anesthetic in conjunction with a steroid for extended relief. Follow-up appointments may be necessary to evaluate the effectiveness of the procedure and to determine any further treatment options if needed.

Short Descr INJ PARAVERT F JNT L/S 2 LEV
Medium Descr NJX DX/THER AGT PVRT FACET JT LMBR/SAC 2ND LEVEL
Long Descr Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral; second level (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) 2 - Payment restriction for assistants at surgery does not apply 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) P6B - Minor procedures - musculoskeletal
MUE 1
CCS Clinical Classification 8 - Other non-OR or closed therapeutic nervous system procedures

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

64490 MPFS Status: Active Code APC T ASC G2 CPT Assistant Article Illustration for Code Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), cervical or thoracic; single level
64493 MPFS Status: Active Code APC T ASC G2 CPT Assistant Article Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral; single level
64495 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral; third and any additional level(s) (List separately in addition to code for primary procedure)
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).
KX Requirements specified in the medical policy have been met
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.
SG Ambulatory surgical center (asc) facility service
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
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).
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
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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
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
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
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.
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.)
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
AG Primary physician
GZ Item or service expected to be denied as not reasonable and necessary
PN Non-excepted service provided at an off-campus, outpatient, provider-based department of a hospital
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.
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).
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.
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).
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code 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
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
JZ Zero drug amount discarded/not administered to any patient
KC Replacement of special power wheelchair interface
KK Dmepos item subject to dmepos competitive bidding program number 2
KQ Second or subsequent drug of a multiple drug unit dose formulation
KS Glucose monitor supply for diabetic beneficiary not treated with insulin
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
MH Unknown if ordering professional consulted a clinical decision support mechanism for this service, related information was not provided to the furnishing professional or provider
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
Q1 Routine 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
RR Rental (use the 'rr' modifier when dme is to be rented)
SC Medically necessary service or supply
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
UA Medicaid level of care 10, as defined by each state
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
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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