Your low back pain has a source. The right procedure depends on which source. I’m Dr. Keith Schmidt, a triple board-certified pain medicine physician in Hoffman Estates, Illinois, and the most common mistake I correct in my consultations is a patient who has had three rounds of epidural steroid injections for a problem that was never inflammatory or radicular to begin with. Intracept (basivertebral nerve ablation), facet radiofrequency ablation, and epidural steroid injection are all good procedures. They are not interchangeable. Each one treats a fundamentally different anatomic generator of back pain, and picking between them is a diagnostic exercise — not a preference exercise. Here’s how I think about it.
The 90-second answer
If your pain shoots down your leg in a specific nerve distribution, your MRI shows a disc herniation or significant stenosis with nerve root inflammation, and the pain is worse with sitting, bending, or coughing — that’s radicular pain. An epidural steroid injection is the right diagnostic and therapeutic tool. If your pain is axial — meaning it sits in the low back, gets worse with extension, twisting, or standing, and a diagnostic medial branch block reproduces relief — that’s facet-mediated pain, and facet RFA is your answer. If your pain is deep midline axial low back pain, the MRI shows Modic Type 1 or Type 2 endplate changes at one or two levels, and conservative care has failed for at least six months — that’s vertebrogenic pain, and Intracept is the procedure. Three procedures, three different sources, three different decision pathways. I see patients every week who’ve had three rounds of epidurals when they actually needed an Intracept.
What each procedure actually does
Epidural steroid injection (ESI)
An epidural steroid injection delivers a small volume of long-acting corticosteroid and local anesthetic into the epidural space — the layer just outside the dura that surrounds the spinal cord and nerve roots. I do this under live fluoroscopy with contrast confirmation, most commonly via a transforaminal or interlaminar approach. The steroid quiets inflammation around an irritated nerve root. The local anesthetic gives immediate but short-lived relief and helps confirm we’re at the right level.
ESI is both diagnostic and therapeutic. When it works dramatically and immediately, it tells me radicular inflammation was the driver. The therapeutic relief typically lasts weeks to a few months. It is the right tool for inflammatory radicular pain — disc herniation, nerve root irritation, foraminal stenosis with radiculopathy. It is the wrong tool for axial mechanical back pain from facet joints or endplates, and giving it anyway is one of the most common patterns I correct.
Facet radiofrequency ablation (RFA)
The facet joints — small paired joints at the back of each spinal level — are a common source of axial low back pain, especially with extension, rotation, and prolonged standing. Each facet joint is innervated by two medial branch nerves. Facet RFA uses a needle electrode to create a thermal lesion on those medial branch nerves, interrupting the pain signal from the joint.
I never do a facet RFA without first doing one or two diagnostic medial branch blocks (MBBs) to confirm the joints are the actual pain generator. If the MBB gives temporary, near-complete relief, the RFA usually delivers six to eighteen months of meaningful relief. The nerves regenerate, the pain returns, and we repeat the procedure when needed. RFA is for confirmed facet-mediated pain. It does nothing for radicular pain and nothing for endplate-driven vertebrogenic pain.
Intracept (basivertebral nerve ablation)
For a long time, we didn’t have a good explanation for the patient with deep, midline, axial low back pain whose imaging didn’t show disc herniation, didn’t show stenosis, and whose facet blocks didn’t help. We do now. The basivertebral nerve runs into the vertebral body and innervates the endplates — the cartilage interfaces between disc and bone. When those endplates become damaged and inflamed (visible on MRI as Modic changes), the basivertebral nerve transmits a chronic, dull, midline ache that masquerades as nonspecific low back pain.
Intracept is a single-procedure, FDA-cleared radiofrequency ablation of the basivertebral nerve performed through a small transpedicular access. One treatment. Long durability — the SMART trial showed sustained relief at five years. It treats vertebrogenic pain specifically, and the candidacy is gated by the MRI: you need to see Modic Type 1 (edema-like) or Type 2 (fatty) changes at the relevant level(s).
Side-by-side comparison
| Epidural Steroid Injection | Facet RFA | Intracept (BVN Ablation) | |
|---|---|---|---|
| Pain pattern | Radicular — shoots down leg, dermatomal | Axial low back, worse with extension/rotation | Deep midline axial low back, often worse with sitting and forward bending |
| Pain source | Inflamed nerve root | Facet joint(s) | Vertebral body endplate (via basivertebral nerve) |
| Key imaging finding | Disc herniation, foraminal stenosis, nerve root impingement | Facet hypertrophy or arthropathy (supportive) | Modic Type 1 or Type 2 endplate changes |
| Diagnostic gate | Pain pattern + MRI; ESI itself is diagnostic | Positive medial branch block (one or two) | Modic changes on MRI + chronic axial pain ≥6 months |
| What it does | Delivers steroid to quiet inflammation around the nerve root | Burns the medial branch nerves innervating the facet | Burns the basivertebral nerve innervating the endplate |
| Setting | Outpatient, ~15-20 minutes | Outpatient, ~30-45 minutes | Outpatient, ~60 minutes |
| Anesthesia | Local + light sedation | Local + light sedation | Local + sedation |
| Recovery | Same-day, normal activity within 24-48 hours | Soreness 3-7 days, full activity within a week | Mild back soreness 1-2 weeks, no heavy lifting for 6 weeks |
| Durability | Weeks to months | 6-18 months | Long durability; SMART trial showed sustained relief at 5 years |
| Repeatable? | Yes, typically 3-4x per year max | Yes, when nerves regenerate | Single procedure per level; rarely repeated |
| Evidence | Decades of literature for radicular pain | Cohen 2020 consensus | Fischgrund 2020 (SMART trial, 5-year data) |
| Insurance friction | Generally covered | Covered after positive MBB | Covered for Modic-positive patients meeting criteria |
How I decide between them in my practice
This is where pain medicine becomes detective work. I don’t pick a procedure first — I pick a pain generator first, and the procedure follows.
The radicular patient. The patient walks in describing pain that shoots from the low back into the buttock, down the back of the thigh, into the calf, sometimes to the foot. It’s worse with sitting, with coughing, with bending forward. The MRI shows a disc herniation impinging the L5 or S1 nerve root. This is inflammatory radicular pain, and an epidural steroid injection — usually transforaminal at the affected level — is the right first procedure. If it works dramatically and the relief lasts, we repeat as needed and let the disc heal. If a series of ESIs gives only short relief and the imaging keeps showing the same lesion, we have a different conversation about decompression or spinal cord stimulation. ESI is not a long-term solution for a structural problem, but it is an excellent diagnostic and bridge therapy.
The facet patient. This patient sits with their hands in the small of their back. The pain is across the low back, sometimes into the buttock, but it doesn’t shoot down the leg in a specific nerve pattern. It’s worse with extension — leaning back, walking downhill, prolonged standing. The MRI shows facet hypertrophy. An epidural would do nothing here, and yet I see these patients all the time who’ve had two or three of them. The right pathway is a diagnostic medial branch block. If the MBB reproduces excellent temporary relief, facet RFA follows, and durability is typically six to eighteen months. I see this in my practice every week — patients who finally got relief once we stopped chasing the wrong target.
The vertebrogenic patient. This is the patient I described in the lede. Deep, dull, midline low back pain. Worse with sitting, often worse with forward bending. Sometimes years of chronic pain with multiple failed treatments. Their MRI shows Modic Type 1 (edema-like signal) or Modic Type 2 (fatty replacement) changes at one or two vertebral endplates — usually L4 or L5. Their facet blocks didn’t help. Their epidurals didn’t help. They’ve been told it’s “nonspecific low back pain” and offered another round of physical therapy. They are Intracept candidates, and the SMART trial data on this procedure is some of the strongest long-term durability evidence in interventional pain medicine. One procedure, sustained relief, and the basivertebral nerve does not regenerate the way medial branch nerves do.
The mixed-source patient. This is the most common version in real life. Many chronic low back pain patients have more than one pain generator. They may have radicular pain and facet pain. They may have facet pain and vertebrogenic pain. The honest version is that we sequence: treat the dominant pain generator first, reassess, and move to the next if pain persists. I don’t stack three procedures on the same day. I want to know what each one did.
The bigger anatomic decision. When low back pain coexists with neurogenic claudication — leg pain on walking that improves with sitting or leaning forward — we may be talking about lumbar spinal stenosis, and a different procedure conversation opens up: epidural, MILD procedure, or surgical decompression depending on the imaging. I cover that decision in detail on the MILD-vs-laminectomy comparison page.
When none of these is the right answer
Some back pain doesn’t fit. If your imaging shows a significant disc herniation with progressive weakness or new bowel/bladder symptoms, you need a spine surgeon — not an injection. If your back pain is accompanied by unexplained weight loss, night pain that wakes you from sleep, fever, or a history of cancer, we work up red flags before any procedure. If your imaging is unremarkable, your physical exam doesn’t localize, and the pain has a strong centrally-sensitized or psychogenic overlay, the right answer is rarely a needle — it’s a multidisciplinary approach with physical therapy, behavioral health, and sometimes neuromodulation. I’d rather tell you that than put a needle in you.
FAQ
I’ve had three epidural injections and they aren’t working. Does that mean I need surgery? Not necessarily. It often means your pain source wasn’t what we treated. Repeated ESIs failing to work is one of the strongest signals that the pain isn’t truly radicular and inflammatory, and that a different procedure — facet RFA or Intracept — may be the right next step. A fresh MRI review looking specifically for Modic changes is worth doing.
How do I know if I have Modic changes on my MRI? They are visible on standard lumbar MRI sequences in the bone marrow of the vertebral body adjacent to the endplate. Modic Type 1 shows up as low signal on T1 and high signal on T2 (edema). Modic Type 2 shows up as high signal on T1 (fatty replacement). The radiology report doesn’t always mention them, and a pain medicine review of the actual images is often what surfaces them.
Can I have all three procedures over time? Yes. Many of my patients with chronic low back pain end up with a layered treatment plan that includes one or more of these procedures at different times, treating different pain generators as they become dominant. The order is dictated by the diagnostic findings, not by patient or physician preference.
Is Intracept covered by insurance? Coverage has expanded significantly. Most major insurers, including Medicare in most regions, cover Intracept for patients with chronic low back pain of at least six months, failure of conservative care, and Modic Type 1 or Type 2 changes on MRI. My office handles the prior authorization workup.
Why do epidurals get prescribed for non-radicular pain so often? Because they’re familiar, easy to authorize, and they sometimes help. The honest answer is that the diagnostic discipline has not always kept up with the procedural options. That’s the gap this page is trying to close.
If you’ve been bounced between procedures and you’re not sure what’s actually causing your back pain
The right procedure starts with the right diagnosis. If you’ve had repeated epidurals that didn’t hold, if you’ve been told your imaging is “nonspecific,” or if you simply want a pain medicine physician to review your MRI and pain pattern and tell you which procedure actually matches your problem — call my Hoffman Estates office at (847) 981-3630 to schedule a consultation. Bring your imaging. I’ll tell you what I see and what I’d do.