Oklahoma Spine & Brain Institute is keeping patients and staff safe during COVID-19. LEARN MORE

918-749-0762
918-749-0762
Back Pain Interupting Your Life?
If you are ready to discover what is causing your pain. Then let us help you, so you can begin the healing process.
We Can help
Spine and Brain Issues Are Our Specialty
Neurosurgeons are specifically trained to deal with disorders affecting the Spine and Nervous System.
We Can Help
Using Advanced Technology
We have been Specialty trained in Minimally Invasive procedures, so you can Return to your Life Faster.
We can help

Spotlight On (Sacroiliac) SI Joint Pain

is your low back pain caused by your SI Joint?

Are you familiar with the deep discomfort lurking around your lower back and buttocks? Check out these videos from Dr. Thambuswamy and Dr. Harwell to see if it could be your SI Joint.  Relief could be just around the corner.

Studies show that 15-30% of chronic low back pain may be coming from the SI joint, and in patients with continued or new onset pain after lumbar fusion, up to 30-43% may have pain coming from the SI joint.

Proudly serving oklahoma for over 50 years

Oklahoma Spine & Brain Institute specializes in compassionate, high-quality neurosurgical care.

The practice has locations in Tulsa, Sallisaw, Miami and Claremore, Oklahoma.

The team of board-certified neurosurgeons at Oklahoma Spine & Brain Institute work together to provide the best neurosurgical treatment possible for our patients.

Learn More

Our Excellent Neurosurgeons

Michael Thambuswamy, MD image

Michael Thambuswamy, MD, MBA

Board Certified Neurosurgeon

Dr. Thambuswamy is top notch! Very knowledgeable, compassionate, patient.
Linda M.Healthgrades Review
Absolutely one of the best doctor visits I've ever had! Michael asked questions, listened, explained, reviewed, worked with us to work out a realistic goal and initial game plan! As a risk management coordinator/patient safety officer for a group of community health clinics, I've worked with several clinicians and would say this would be a model visit!
L & C HilliardGoogle Review
Excellent results from my recent lumbar and cervical surgery with fusion , Dr Thambuswamy cares, he listens, very personal, and professional. I hope I never need spine surgery again but if I did, he is my go to Doc. He can handle the toughest of cases, mine back was very bad and took many hours and he handled it like a real pro!
Dewey J.Google Review
Dr. Thambuswamy wants to hear from you.
Leave A Review
We Care
I was very pleased with Dr Harwell. I was admitted through ER @ Hillcrest. He operated on my spine and I’m so pleased with the outcome. Had follow up appointment yesterday and I am healing well. Just a few more weeks in my brace. I had 32 staples in my back. His nurse took them out several weeks ago. She was so gentle and efficient with the removal. I’m very confident with my healthcare here.
Cynthia D.Google Review
My husband, who has had four previous neck surgeries (not with Dr. Harwell), has never had a recovery as good as this last surgery with Dr. Harwell... hasn't felt this good in 15 years, thank you sooo much.
Caprice F.Google Review
He is a very compassionate doctor his is very thorough and goes through all tests to make sure that he's finding the right thinkg is wrong with you, I think he is the most wonderful doctor.
Cindy C.Google Review
Dr. Harwell wants to hear from you.
Leave A Review
We Care
Daniel M Harwell, MD

Daniel Harwell, MD

Board Certified Neurosurgeon

Our Certified Physician Extenders

Phil Lehr, APRN,CNP, RNFA

Spencer Hylander, APRN, CNP, RNFA

We Provide Diagnosis and a Treatment Plan to Help You start

Your Road to Recovery.

Diagnose

We use diagnostic imaging, hand on examination, and ... to diagnose your problem.

Treatment Plan

Surgery is never our first option. We look for more non-invasive treatments first. Physical Therapy, pain injections,

Recovery

After treatment we monitor your progress to make sure you are on the road to recovery. So you can Get Back to Enjoying Life.