Appointments 425.454.5046


Our sleep and pulmonary physicians have both served in a Chief Resident capacity during their residency as well as Medical Director in various roles and have been recognized as a “Top Doctor” by both Seattle Magazine and Seattle Met Magazine.

Scott T. Bonvallet, M.D., F.C.C.P., D.A.B.S.M.

Bonvallet_4345.05.14ACCEPTING NEW PATIENTS: Yes. Dr. Scott T. Bonvallet is the Medical Director of the Overlake Sleep Disorders Center and is board certified in Sleep Medicine, Pulmonary Diseases, Critical Care Medicine, and Internal Medicine. He received his medical degree at the Medical College of Wisconsin, after which he did his residency/chief residency at Oregon Health Sciences University, and lastly, completed his fellowship in Pulmonary Diseases/Critical Care/Sleep Medicine at the University of Colorado Health Sciences Center.

Dr. Bonvallet has been in private practice for 20 years and has been recognized as a “Top Doctor” in his specialty by both Seattle Magazine and SeattleMet .

He lives in Woodinville with his wife and three children. Dr. Bonvallet enjoys all aspects of physical fitness and is a three-time Ironman Canada competitor.



Randip Singh, M.D.

Singh (221).05.14ACCEPTING NEW PATIENTS: Yes. Randip Singh, M.D., joined Overlake Internal Medicine Associates in 2006. Born in Maryland, he received his medical degree from Dayanand Medical College in Punjab, India, and completed his internship in Internal Medicine at Atlantic City Medical Center. Dr. Singh also completed a Neurology Residency and Chief Residency at Georgetown University, Washington DC.

He moved to Washington State in 2005 after completing additional subspecialty training at Beth Israel Deaconess Medical Center, Harvard Medical School, in Clinical Neurophysiology and Sleep Medicine in Boston Massachusetts. Dr. Singh is board certified in Neurology and Sleep Medicine. He is currently a Clinical Instructor in Neurology at the University of Washington.




Reuben Walia, M.D.

Dr Walia PortraitDr. Walia is board certified and fellowship trained in Sleep Medicine. He is also board certified in Family Medicine. He completed his residency and fellowship training at The University of Oklahoma Health Sciences Center in Oklahoma City where he was born and raised.

Along with treating patients, Dr. Walia has an interest in medical research and has taken part in numerous research projects. He has published articles in the field of sleep medicine, one of which won the award for “Excellence in Medical Writing” from the Journal Editorial Board of the Oklahoma State Medical Association. The article was published in their December 2014 issue:

“Are At-home Sleep Studies Performed Using Portable Monitors as effective at Diagnosing Obstructive Sleep Apnea in Adults as Sleep Laboratory-based Polysomnography?”

Additionally, Dr. Walia was selected for the 2016 “Top Doctors” edition of the Seattle Met Magazine, which highlights the best healthcare practitioners in the Seattle area.

When not in the office, Dr. Walia enjoys the outdoors, being very active and traveling. His favorite activities include running in the Seattle sun, snowboarding, hiking, and playing multiple sports.

Dr. Walia arrives in April, 2018 and looks forward to accepting new patients at Overlake Sleep Disorders Center.