Risky Language: Facet Joint Injection Denials
Article Reference Code: NAMAS.04.17.2026
Written by: Robin Sewell CCS, CDIP, CPC, CIC, CCDS
I recently reviewed a handful of RAC denials for Medical Necessity of facet joint procedures. Interestingly, the denials mainly focused on one single bullet in the Local Coverage Determination (LCD) Facet Joint Interventions for Pain Management. Namely, the injections were not covered due to:
- Absence of untreated radiculopathy or neurogenic claudication (except for radiculopathy caused by facet joint synovial cyst)
What about that specific language triggered the denial?
Lumbar facet procedures are billed with CPT® code 64493 (injection, paravertebral facet joint, lumbar or sacral; single level), and sometimes with 64494 or 64495 for additional levels.
Providers are careful to cross their T’s and dot their I’s in their documentation, but then… The denial arrives! The rationale is that the documentation (and likely the ICD-10-CM codes) reflect that the patient had radiculopathy and/or neurogenic claudication.
Red Flag!
The LCD requires absence of untreated radiculopathy or neurogenic claudication. If not appropriately documented, the criteria are not met. Who knew radiculopathy and/or neurogenic claudication could be risky language?
What the LCD Actually Requires
Does this mean that the patient cannot have radiculopathy or claudication at all? That would be absurd. Patients often have multiple pain generators!
What the policy says is that if the patient has these pain generators, they must have been treated and not be the source of the pain/reason for the facet joint injection.
Why?
- Because the coverage criteria are designed for patients with facet-mediated pain: Not pain of a neurological source.
If nerve involvement is present, it should be addressed first because treating the facet joint may not resolve the true source of pain. For this reason, a facet injection billed under CPT 64493–64495 may not be considered reasonable and necessary when an untreated neurologic condition could explain the symptoms.
The RAC auditors will ensure whether the injection was the appropriate intervention based on documented pathology.
Why This Terminology is Risky
The words radiculopathy and neurogenic claudication are not generic descriptions of back pain. They may imply:
- Nerve root compression/irritation
- Central canal stenosis
- Neurogenic involvement
Facet joint injections (64493–64495) predominantly treat axial pain. CMS provides the definition of axial as “relating to or situated in the central part of the body, in the head and trunk as distinguished from the limbs, e.g., axial skeleton.” This distinction is further clarified by their definitions of:
- Radiculopathy– “Radiating neuropathic pain causally related to the spinal nerve root irritation, which extends distally producing neuropathic pain in a dermatomal pattern.”
- Neurogenic claudication– intermittent leg pain from impingement of the nerves emanating from the spinal cord (also called pseuduoclaudication)
When documentation includes radiculopathy or neurogenic claudication, auditors interpret that as evidence of a neurologic pain generator.
If that neurologic condition (which is likely flagged by RAC due to the diagnosis code on the claim) is present and there is no documentation clarifying its treatment status or clinical relevance, the claim becomes a denial.
What “Untreated” Really Implies
From a coverage perspective, “untreated” may imply that the neurologic pathology has not been evaluated or managed in a directed way. However, the policy does not provide specific examples of what constitutes treatment. This has given rise to confusion in the Pain Management Community.
For example, in CMS Article A58607 Response to Comments: Facet Joint Interventions for Pain Management, commenters suggested that multiple pain generators may be present in a patient and one commenter suggested ‘Please include the definition of “untreated” in the definitions list.’ CMS comment: “Literature to support the requested coverage for facet joint procedures in the acute phase for traumatic facet joint pain and untreated radiculopathy or neurogenic claudication can be submitted and reviewed on reconsideration.”
Thus, while the policy suggests that radiculopathy or claudication imply nerve-mediated pain, the Response to Comments demonstrates a valid defense for facet joint injections in patients with multiple pain generators.
The safest defense lies, not in avoiding the terms radiculopathy or claudication, but documenting whether those conditions are clinically active and whether they are driving the patient’s current pain.
Documentation Example Triggering Denial
Indication for procedure: Patient presents with radicular pain. He continues to complain of low back and bilateral buttock pain with intermittent radiation to the right calf x 1 year. MRI and EMG evidence of lumbar spinal stenosis.
- In this case, the provider linked spinal stenosis to radicular pain and referenced the MRI which demonstrated spinal cord pathology.
Documentation Example NOT Triggering Denial
Indication for procedure: Patient presents s/p diagnostic L3, L4, L5 medial branch block bilaterally on xx/xx/2x with reported >80% relief in her axial low back pain x 2 days post procedure. She admits the pain has returned to baseline and would like to schedule her second block.
- In this case, the provider specifically documented “axial pain”. The “non-risky” language
Final Takeaway
In today’s audit environment, terminology carries policy consequences.
Radiculopathy and neurogenic claudication are neurologic syndromes. When those words appear in the record, they may signal nerve involvement. Facet injections billed under CPT 64493–64495 will be at risk for denial without proof of treatment.
Contact Robin on LinkedIn by Clicking her Name Below:
Robin Sewell, CDIP, CCS, CIC, CPC, CCDS
Robin Sewell is a highly experienced healthcare coding and clinical documentation professional with expertise spanning inpatient and outpatient coding, auditing, and CDI. She holds multiple credentials, including CDIP, CCS, CIC, CPC, and CCDS, and is recognized for her strong knowledge of coding guidelines, compliance, and documentation integrity. Robin is passionate about education and helping organizations improve accuracy, quality, and reimbursement through effective coding and CDI practices.
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