Our Physicians

Jamie Lewis, MD

A Board Certified physician in both Physical Medicine and Rehabilitation with a subspecialty in Pain Medicine, Dr. Jamie Lewis treats patients throughout the Pacific Northwest.

Dr. Lewis received a Bachelor of Science in Biology from the University of California, Riverside, and earned his Doctor of Medicine from Loma Linda University School of Medicine. While continuing his clinical training, Dr. Lewis completed an internship in Internal Medicine, a residency in Physical Medicine and Rehabilitation, and a fellowship in Pain Management at Loma Linda University and affiliated hospitals.

Dr. Lewis completed specialty training in Regenerative Medicine and is the medical director of the Integrated Pain Science Center and Northwest Center for Regenerative Medicine.

Ghassan Nemri, MD

Dr. Nemri is a graduate of Minsk State Medical University. He completed an Anesthesiology residency program at Cook County Hospital in Chicago, Illinois, then continued to further his specialization in Pain Management by completing a fellowship program at the same institution. He is Board Certified in both Anesthesiology and Pain Management.

Dr. Nemri practiced Anesthesia and Pain Management for several years in the largest pain management group in Northwest Indiana and the Greater Chicago area before moving to Washington State to be closer to his family.

Dr. Nemri’s extensive experience has brought many patients the expertise of a compassionate and caring physician.

Howard Grattan, MD

I was born and raised in the farmlands of Iowa. I completed a BS degree in Biology with minors in Chemistry and Psychology. From there I moved on to medical school at Loma Linda University completing a residency in physical medicine and rehabilitation and a fellowship in pain management. I am board certified in each and have been in private practice for the past 15 years.

I decided to make the change to regenerative medicine in 2022 after I herniated my C6-7 disc to the left with severe nerve root compression with significant pain, numbness as well as some weakness. I was going to have surgery but Dr. Jamie Lewis convinced me to have a Regenexx treatment as I waited. Turned out that I never needed the surgery as the platelet lysate injection series stopped the pain and woke up the arm. Now I have no sensation loss or strength loss. I was aware of PRP treatments but I had no idea of the effectiveness that could be achieved even with my severe nerve root compression from a disc herniation. I have been studying, training and performing regenerative treatments since then.