Most of the patients I evaluate for lumbar spinal stenosis in my Hoffman Estates practice have been told three different things by three different doctors: get another epidural, hold the line and wait, or sign up for a laminectomy. None of those is wrong. None of them is right for everyone. Here’s the short version of how I think about choosing between an epidural steroid injection, the MILD® procedure, and a laminectomy for lumbar spinal stenosis with neurogenic claudication. As a triple board-certified pain medicine specialist (ABA Anesthesiology, ABA Pain Medicine, ABIPP), I do the first two of those three; I don’t do open spine surgery, and I have a clear, honest view of when it is the right answer. The decision is not “which is best.” The decision is “which fits the severity and anatomy in front of me.”
The 90-second answer
If you have neurogenic claudication — leg pain, heaviness, or cramping that comes on with standing or walking, and is relieved by sitting or leaning forward — your options live on a ladder. Epidural steroid injection is the first rung: a low-risk, image-guided injection that calms inflammation around the compressed nerves, gives weeks-to-months of relief in many patients, and tells us whether the nerves are the pain generator. MILD® is the middle rung: a percutaneous outpatient decompression for the very specific patient with ligamentum flavum hypertrophy ≥2.5 mm, no general anesthesia, no hardware, no fusion. Laminectomy is the top rung: a true surgical decompression for severe stenosis, bony stenosis, multilevel disease, or anyone who has failed less-invasive options. Open spine surgery is not the enemy. It is the right tool when the problem is big enough to need it. Match the procedure to the disease.
What an epidural steroid injection actually does
A lumbar epidural steroid injection (ESI) delivers a small volume of long-acting corticosteroid and local anesthetic directly into the epidural space — the layer surrounding the dura that houses the nerve roots — under live fluoroscopic guidance. I use either a transforaminal approach (placing medication right at the affected nerve root through its bony foramen) or an interlaminar approach (entering between two vertebrae). Both reduce the inflammatory soup around the compressed nerves so the nerves can heal, function, and stop screaming.
The honest version is this: an ESI does not change the bony or ligamentous architecture of your spine. It does not “unclog the pipe.” What it does is buy you time, often months of meaningful relief, and it tells me something diagnostically important — if your leg pain dramatically improves after an epidural placed at L4-L5, the L4-L5 stenosis is almost certainly your pain generator. That information is gold when we’re deciding what to do next.
ESI is the right first step for most patients with stenosis and neurogenic claudication. It is rarely the right only step long-term, because the underlying ligamentum flavum and bony narrowing are still there.
What the MILD® procedure actually does
The MILD procedure — minimally invasive lumbar decompression — is a percutaneous outpatient debulking of a thickened ligamentum flavum. Through a roughly 5–6 mm portal (no open incision, no stitches), under live fluoroscopic guidance, I remove portions of the hypertrophied ligamentum flavum and small pieces of bone to restore canal space for the nerves. No general anesthesia. No fusion. No implanted hardware. Patients go home the same day with a Band-Aid. The full procedural deep dive lives on the MILD procedure page.
MILD is a precision tool. Its candidacy is anatomically specific. You are a strong MILD candidate if you have (1) lumbar spinal stenosis with neurogenic claudication — the classic shopping-cart-sign pattern — AND (2) ligamentum flavum hypertrophy of ≥2.5 mm on MRI. That second criterion is non-negotiable. The MILD device is designed to debulk a thickened ligament. If your stenosis is purely bony, purely from disc herniation, or driven by instability, MILD has nothing to do.
The randomized MOTION study (Staats et al., 2022) compared MILD plus conventional medical management against conventional medical management alone in patients with stenosis from ligamentum flavum hypertrophy, and found MILD patients had significantly better function and pain scores at one year, with very low complication rates [Pain Practice 2022, MOTION RCT]. The CMS national coverage determination for MILD is built around exactly this candidacy.
What a laminectomy actually does
A lumbar laminectomy is the open spinal surgical operation that has been the gold-standard decompression for severe stenosis for decades. A spine surgeon makes an open midline incision, retracts the paraspinal muscles, and removes the lamina (the bony “roof” of the spinal canal) and the thickened ligamentum flavum from the affected levels, directly visualizing and decompressing the cauda equina and nerve roots. In selected patients with instability or spondylolisthesis, the surgeon adds an instrumented fusion to stabilize the level.
I am not a spine surgeon. I refer for laminectomy when the disease has outgrown what I can do safely in a procedure suite. The trade-off is exactly what you would expect: laminectomy provides the largest mechanical decompression of the three options — it can handle severe central stenosis, severe lateral recess stenosis, severe foraminal stenosis, and multilevel disease that MILD cannot reach — but it requires general anesthesia, an inpatient or extended-recovery course, and a real surgical risk profile. The SPORT trial (Weinstein et al., 2008) showed that for patients with symptomatic lumbar stenosis, surgical decompression produced better outcomes than non-operative care out to 4 years and beyond [NEJM 2008, PMID 18287602], particularly in patients with severe disease. Open spine surgery, in the right patient, is one of the most effective operations in medicine. The job is matching the patient to the procedure.
Side-by-side: ESI vs MILD vs Laminectomy
| Feature | Epidural Steroid Injection | MILD® Procedure | Lumbar Laminectomy |
|---|---|---|---|
| What it does | Anti-inflammatory medication around compressed nerves | Percutaneous debulking of hypertrophied ligamentum flavum | Open surgical removal of lamina + ligamentum flavum (± fusion) |
| Decompresses anatomy? | No — calms inflammation around existing compression | Yes — modest, ligament-focused decompression | Yes — largest, most complete decompression |
| Ideal candidate | Stenosis + neurogenic claudication, any severity, as first step | Stenosis + neurogenic claudication + ligamentum flavum ≥2.5 mm | Severe stenosis, bony stenosis, multilevel disease, failed less-invasive options, instability/spondylolisthesis |
| Diagnostic value | High — confirms which level is the pain generator | Lower — anatomy is already confirmed on MRI before procedure | Limited diagnostic role; planned surgical decompression |
| Anesthesia | Local + light sedation | Local + light sedation (no general) | General anesthesia |
| Setting | Office procedure suite or ASC | Procedure suite or ASC (outpatient) | Hospital OR (inpatient or 23-hr observation typical) |
| Incision / hardware | None — needle only | Tiny percutaneous portal, no stitches, no implant | Open midline incision; possible instrumented fusion |
| Procedure time | 15–30 minutes | 60–90 minutes typical | 1.5–4+ hours, longer if multilevel or with fusion |
| Recovery | Same day. Driving same day or next morning. Activity in 1–2 days. | Same day home. Light activity 1–2 days. Walking program right away. Full activity ~2 weeks. | Inpatient stay common. Weeks of restricted activity. Return to office work often 4–8 weeks; heavier work longer. |
| Durability of relief | Weeks to several months; repeat injections at intervals possible | Sustained in MOTION RCT at 1 year and beyond when candidate is correct | Years to decades when patient and technique are well-matched |
| Complication profile | Very low. Rare: infection, dural puncture, transient steroid effects (insomnia, hyperglycemia) | Very low. Rare: dural tear, bleeding, infection, incomplete decompression | Higher than the other two — infection, dural tear, persistent weakness, adjacent-segment problems, surgical-recovery morbidity |
| Reversible? | Yes — wears off | Yes anatomically (you can still have a laminectomy after) | Largely not — bone is removed; instrumented fusion is not reversed |
| Insurance friction | Well-established CPT codes, payer-friendly with proper documentation | CMS national coverage when candidacy criteria are documented; commercial coverage variable but growing | Universally covered when indicated; pre-auth required and meaningful |
| Right call when… | First-line interventional. Diagnostic. Bridge for the right surgical candidate. | Imaging fits the device and the patient wants outpatient decompression without surgery | Severe disease, bony stenosis, instability, multilevel disease, or genuine failure of less-invasive options |
How I decide between ESI, MILD, and laminectomy in my practice
The honest decision algorithm has three forks.
Fork one: How severe is the stenosis and how much function has the patient lost? A 64-year-old who walks a half-mile before her legs give out, sleeps fine, drives without trouble, and has moderate central stenosis with prominent ligamentum flavum on MRI is in a very different place than a 78-year-old who can walk fifty feet, has lost twenty pounds because he can’t stand long enough to cook, has severe central stenosis at three levels and a Grade 1 spondylolisthesis. The first patient starts on the ladder at the bottom — physical therapy, then an epidural — and only escalates if those don’t hold. The second patient probably needs a surgical evaluation, today, and an epidural in the meantime is a reasonable bridge — not a destination.
Fork two: What does the MRI show, specifically? The MILD procedure has an anatomic gate. If the dominant compressor is hypertrophied ligamentum flavum ≥2.5 mm — and especially if the bone work is modest — MILD has something real to offer. If the dominant compressor is severe central bony narrowing, a large disc herniation, lateral recess stenosis driven by facet hypertrophy, or significant foraminal stenosis, the patient needs a procedure that actually addresses that anatomy. MILD won’t fix bony stenosis. Trying to push it past its candidacy is how patients end up disappointed and going to surgery anyway.
Fork three: What has already failed? The patient who has had two well-targeted epidurals over six months with meaningful but fading relief is telling me something different than the patient who had one poorly-targeted injection somewhere two years ago. I review the prior injections — the level, the approach, the documented response — before I assume “the injections didn’t work.” If conservative care plus appropriate ESIs genuinely haven’t held, and the imaging fits MILD candidacy, MILD is often the right next step before jumping to open surgery. If the imaging doesn’t fit MILD and conservative care has failed, that’s when I have an honest conversation about spine surgical referral. Surgery is not failure. Surgery, for the right disease, is the right answer.
Two real examples. Patient A is 67, walks a quarter-mile before claudicating, MRI shows two-level moderate central stenosis with ligamentum flavum measured at 4.2 mm bilaterally at L4-L5. She’s had one good epidural that lasted three months. We did a second epidural for confirmation and bridge, then MILD at L3-L4 and L4-L5. She is walking a mile six months later. Patient B is 74, can barely walk to his mailbox, has a Grade 2 spondylolisthesis at L4-L5 with severe central and lateral recess stenosis, and an epidural that helped for three weeks. He needed a decompression and a fusion. I referred him to a spine surgeon, did the bridging epidural while he waited for surgery, and a year later he is walking, lifting groceries, and back to his church choir. Two patients, two different right answers. Neither answer was wrong.
When none of these is right (yet)
There are patients in front of me where epidural, MILD, and laminectomy are all the wrong next step. If a patient has not yet completed a real course of physical therapy focused on lumbar flexion-bias exercise, hip mobility, and gait endurance, we start there — neurogenic claudication often responds meaningfully to the right PT program. If imaging shows minimal stenosis and the predominant pain is facet-mediated axial low back pain, the right answer is a medial branch block and possibly a radiofrequency ablation, not a decompression (see RFA vs medial branch block). If imaging shows Modic Type 1 endplate changes and the pain is anterior column / vertebrogenic, the right answer may be basivertebral nerve ablation, not a decompression at all. And if the pain pattern is dominant neuropathic burning in the legs with a known structural problem, a thoughtful neuromodulation consult (see SCS vs DRG vs PNS) sometimes makes more sense than another decompression. The goal is the right tool for the right anatomy.
FAQ
If I get an epidural and it works, should I still consider MILD or surgery? Maybe. A successful epidural confirms which level is the pain generator and buys time, but it doesn’t change the anatomy. If your epidurals are giving you 6–9 months of relief and you’re functioning well, repeat injections at intervals can be a reasonable long-term plan. If the relief duration is shrinking, or if your function isn’t holding between injections, that’s the signal to consider a definitive decompression — MILD if your anatomy fits, laminectomy if it doesn’t.
Can I have MILD if I’ve already had a laminectomy at a different level? Often yes. Prior surgery at a different level does not exclude you from MILD at the symptomatic level. I review your operative reports and your current MRI before deciding.
Is MILD just a “smaller laminectomy”? No. A laminectomy removes a substantial portion of bone (the lamina) and performs a complete decompression of the central canal and nerve roots under direct visualization. MILD removes portions of the ligamentum flavum plus small pieces of bone through a tiny portal under fluoroscopy. The decompression is real but more modest, and the candidacy is specific. They are different operations for different severities.
Will my insurance cover MILD? Medicare covers MILD with a national coverage determination when candidacy criteria — neurogenic claudication and documented ligamentum flavum hypertrophy ≥2.5 mm — are met and documented. Commercial coverage varies but has been broadening. My office handles the prior authorization with the supporting MRI measurements and clinical notes.
Is laminectomy still worth it at my age? Age is a number; biological reserve, comorbidities, and goals are what matter. I have referred 80-year-old triathletes for laminectomy and watched them return to swimming. I have also referred 65-year-old patients with multiple comorbidities to avoid laminectomy and stay on a less-invasive plan. The right answer depends on you, not your birth year.
If you’ve been told to “wait it out” or jump straight to surgery — get a second opinion first
If you have lumbar spinal stenosis and you’re stuck between “wait it out and lose function” and “sign up for a laminectomy,” it’s worth a second opinion. Sometimes the right answer is more conservative care. Sometimes it’s an epidural that confirms the diagnosis and buys real time. Sometimes it’s MILD, the outpatient middle rung. And sometimes — honestly and unapologetically — it is open spine surgery. Match the tool to the problem. Call my Hoffman Estates office at (847) 981-3630 to schedule a consultation, or read more on the MILD procedure page and the epidural steroid injection page.