Lumbar Fusion Surgery

Medically reviewed by Dr. David L. Greenwald, MD, FAANS, FACS — dual board-certified spine surgeon & neurosurgeon. Last reviewed October 2026.

Desert Spine and Pain performs lumbar fusion surgery for Phoenix-area patients whose lower-back pain comes from instability, degeneration, or nerve compression that hasn't responded to conservative care. When fusion is truly needed, Dr. Greenwald uses minimally invasive techniques wherever possible to stabilize the spine, relieve pain, and get you back to life faster.

Book a Consultation — (602) 566-9500

What Is Lumbar Fusion Surgery?

Lumbar fusion — or lumbar spinal fusion — is a surgery that permanently joins two or more vertebrae in the lower (lumbar) spine so they heal into a single, solid bone. By eliminating motion at a painful or unstable segment, fusion relieves the pain that movement was causing and restores stability. The surgeon removes the damaged disc, places a spacer called an interbody cage to restore height and hold the vertebrae apart, and secures everything with titanium pedicle screws and rods while new bone grows across the segment.

What Lumbar Fusion Does

Conditions Lumbar Fusion Treats

Lumbar fusion is used when a lower-back problem causes instability or nerve compression that conservative care can't resolve, including:

• Degenerative disc disease with instability or collapse
• Spondylolisthesis (a vertebra slipping forward on another)
• Spinal stenosis that requires decompression plus stabilization
• Recurrent herniated disc or disc extrusion
• Spinal deformity, fractures, or failed previous surgery

Am I a Candidate for Lumbar Fusion?

You may be a candidate for lumbar fusion if you have persistent lower-back pain (often with leg symptoms) traced to a specific, unstable segment, and you've already tried conservative options without lasting relief. Good candidacy usually means:

• Imaging (MRI/CT/X-ray) confirms instability, slippage, or segmental collapse at a specific level.
• Several weeks to months of conservative care — therapy, medication, and often injections — haven't given lasting relief.
• Your pain clearly matches the level seen on imaging.

How Lumbar Fusion Is Performed

Lumbar fusion is done under general anesthesia at an accredited affiliated surgical facility (not at our office). Dr. Greenwald chooses the approach that fits your anatomy and goals — often a minimally invasive technique that uses smaller incisions and spares the muscles for a faster recovery:

• TLIF / PLIF — from the back (posterior), common and versatile.
• ALIF — from the front (anterior), through the abdomen, for excellent disc-space access.
• LLIF / XLIF — from the side (lateral), a muscle-sparing minimally invasive approach.

In each, the surgeon removes the damaged disc, places an interbody cage to restore height, and secures the segment with pedicle screws and rods. A bone graft is added so the vertebrae fuse into one solid unit over the following months. Most lumbar fusions take a few hours, and many are now done with a short hospital stay.

How a Lumbar Fusion Is Built

Benefits & Risks

Benefits — for the right patient, lumbar fusion is designed to relieve pain from instability, stop painful motion, decompress pinched nerves, and restore the ability to stand, walk, and work. Minimally invasive techniques can mean less blood loss, less muscle damage, and a quicker return to activity.

Recovery & Return to Activity

Recovery from lumbar fusion is gradual — the implants provide immediate stability, but the bone itself fuses over months. Minimally invasive approaches often shorten the early recovery. A typical timeline:

Call us promptly for fever, worsening weakness or numbness, wound drainage, or calf pain or swelling.

Expected Outcomes

When the painful segment is correctly identified and the patient is a good candidate, most people experience meaningful, lasting relief and a return to daily activities after lumbar fusion. Outcomes depend on your diagnosis, overall health, bone quality, smoking status, and how closely you follow your rehab plan — which is why careful patient selection and an experienced surgeon matter so much. We'll set realistic expectations for your specific case; we never promise a guaranteed result.

Lumbar Fusion Alternatives

Fusion is never our first option. Before recommending surgery, we exhaust conservative and minimally invasive care — physical therapy, medications, and epidural steroid injections or nerve blocks. For some patients, motion-preserving lumbar artificial disc replacement or a less-invasive decompression may be an alternative to fusion. Dr. Greenwald will tell you honestly whether fusion is truly the best option for you.

Why Choose Our Lumbar Fusion Surgeon, Dr. Greenwald

Lumbar fusion is a procedure where the surgeon's judgment and experience directly shape the result. At Desert Spine and Pain, your fusion is performed by a lumbar fusion surgeon who is both a board-certified spine surgeon and a neurosurgeon — a dual qualification few surgeons in Phoenix hold.

Insurance, Out-of-Network & Cost

Lumbar Fusion Surgery in Phoenix, AZ

Lumbar Fusion Surgery: Frequently Asked Questions