64493

Injection(s), diagnostic or therapeutic agent, paravertebral facet joint (or nerves innervating facet joint) (e.g., anesthetic, steroid), lumbar or sacral; single level

CPT code 64493 describes the administration of a diagnostic or therapeutic agent (e.g., local anesthetic, steroid) into a single level lumbar or sacral paravertebral facet joint or the nerves innervating that facet joint. This procedure is performed to diagnose the source of spinal pain suspected to originate from a specific lumbar or sacral facet joint or to provide therapeutic relief for pain caused by facet joint arthropathy or inflammation at that particular level. The injection is typically guided by imaging (such as fluoroscopy or computed tomography) to ensure precise needle placement and enhance safety and efficacy. This code represents the first or primary lumbar/sacral facet joint injection performed in a session, targeting a single specific level.

Clinical Indications

  • Chronic low back pain or sacral pain suspected to originate from a single lumbar or sacral facet joint (e.g., facet arthropathy, spondylosis, or capsulitis).
  • Pain that is exacerbated by extension and/or rotation of the spine, localized to a specific lumbar or sacral level.
  • Failed conservative management (e.g., physical therapy, oral anti-inflammatory medications, muscle relaxants) for localized facet joint pain.
  • Diagnostic block to confirm a specific facet joint as the primary pain generator prior to considering other interventions like radiofrequency ablation.
  • Therapeutic relief for pain confirmed to be from a single facet joint, aiming to reduce inflammation and pain perception.

Procedure Steps

  1. Patient is positioned prone on the procedure table, and the skin over the intended injection site in the lumbar or sacral region is thoroughly prepped with an antiseptic solution.
  2. Local anesthetic is infiltrated into the skin and subcutaneous tissue at the anticipated needle entry point to minimize discomfort.
  3. Under continuous fluoroscopic or CT guidance, a thin spinal needle is carefully advanced towards the target single lumbar or sacral facet joint capsule or the medial branch nerve supplying that specific joint.
  4. Before injecting the therapeutic agent, a small amount of contrast medium may be injected to confirm correct needle placement (intra-articular or peri-neural) and to ensure there is no intravascular uptake.
  5. Once proper placement is verified, the diagnostic (e.g., local anesthetic) and/or therapeutic (e.g., corticosteroid) agent is slowly injected into the target area.
  6. The needle is then withdrawn, and a sterile dressing is applied to the injection site.
  7. The patient is monitored for a short period post-procedure for any immediate adverse reactions or changes in pain levels.

Coding Guidelines

  • CPT code 64493 is used for the first (single) lumbar or sacral level paravertebral facet joint (or medial branch nerve) injection performed in a session.
  • For injections at additional lumbar or sacral levels in the same session, report CPT code 64494 for the second level and CPT code 64495 for the third and any additional levels.
  • These codes (64493-64495) inherently include image guidance (e.g., fluoroscopy, CT); therefore, separate reporting of image guidance codes (e.g., 77002, 77012) is inappropriate and will result in a denial.
  • If injections are performed bilaterally at the same level, append modifier 50 (Bilateral Procedure) to the appropriate CPT code (e.g., 64493-50 for bilateral single-level lumbar/sacral injection).
  • Comprehensive documentation is required, including the specific anatomical level(s) injected (e.g., L4-L5, L5-S1), whether the injection was intra-articular or a medial branch block, the agents injected, and the volume of each agent.
  • These procedures typically have a global period of 0 days.

Associated ICD-10 Codes