Anas Rihawi, MD, MPH
Sleep Specialist
Dr. Anas Rihawi, MD, MPH is a board‑certified sleep medicine physician who practices pulmonary and critical care medicine at Oregon Health & Science University. He trained at St. Elizabeth’s Medical Center in Boston and the University of Arizona. Dr. Rihawi holds a Master of Public Health degree from Johns Hopkins University and is an active member of the American Academy of Sleep Medicine. Through his collaboration with Oregon Sleep Associates, Dr. Rihawi delivers attentive, high‑quality sleep care with a focus on patient well‑being and an exceptional experience.
Matthew Keeslar, PA-C
Physician Associate
A former actor who successfully transitioned into a career as a certified Physician Assistant (PA-C) and medical instructor. Born in 1972, he is known for his roles in films like Waiting for Guffman, The Last Days of Disco, and Scream 3, as well as the sci-fi dramedy The Middleman.
After a decades-long career, Keeslar retired from acting in 2010 to pursue science. He graduated Phi Beta Kappa from Reed College with a biology degree in 2014, following initial coursework at Portland Community College. He went on to earn a Master of Physician Assistant Studies from Oregon Health & Science University (OHSU).
Now a practicing clinician in Oregon, Matt also served as an instructor at the OHSU School of Medicine. He has worked in urology and men's health, urgent care, and pediatrics.
Julio Noda, MD
Dr. Julio Noda served the Salem, Oregon, community for more than seven years as a board-certified sleep medicine physician. He is excited to now bring his expertise in sleep medicine to the Portland community as a member of Oregon Sleep Associates.
Dr. Noda earned his medical degree in Peru before moving to the United States to complete his internship and residency training. He subsequently completed subspecialty fellowships in Geriatrics, Pulmonary Medicine, and Sleep Medicine.
Dr. Noda treats a wide range of sleep disorders in adults, with particular expertise in sleep-disordered breathing, sleep-related hypoventilation, and pulmonary conditions that affect sleep.
Outside of work, Dr. Noda enjoys exploring the outdoors, foraging, cooking, gardening, and staying active through running and soccer.
Rachel Etringer, PA
I'm Rachel Etringer, a family nurse practitioner with experience in managing chronic health conditions across the life span. Quality sleep is so essential in forming a basis for improved physical and emotional health. I believe it's important to talk with patients to identify their goals and work together to develop a treatment plan that suits them.
In my free time, I enjoy taking long walks to explore the city (bonus points if there are food stops along the way), reading, and traveling with my family.