Mason Clinic - Pediatrics

Pediatrics specializes in the healthcare of infants, children, and adolescents. Our goal is to provide their patients with the best possible medical care, and parents with preventative guidance, as they follow your child from birth to adulthood.

Mason Clinic

  • Monday-Friday: 7:30 a.m. to 5 p.m.


When things get busy, Pediatrics providers team up to make sure all kids needing same-day care are seen. The staff is also available on-call nights and weekends, so that they can help parents determine whether their child needs to be seen immediately at the Hospital, the next day at Mason Clinic, or can be treated at home.

Arriving on time for your scheduled appointment is important in addressing your healthcare needs. Please notify Mason Health as soon as you know you will need to change or cancel your appointment. You are required to cancel your appointment at least one business day prior to your scheduled appointment because of high patient demands. Your ability to schedule future appointments will change because of missed appointments or cancellations.

If you have questions about our No-Show and Cancellation policy, please call the clinic or download a copy of the No-Show and Cancellation Policy as indicated below. Please bring your ID and copy of your insurance card to your appointment.

Clinic Providers

Ezekiel Melquist, MD

Ezekiel Melquist, MD, joins Mason Health in April 2023. He is a Washingtonian, and glad to return to his home state. He attended medical school in London, UK, where he was born, then completed residency in Brooklyn, NY. He has a special interest in medical education, lifestyle medicine, and gender medicine.

Thuy Nguyen, MD

Accepting new patients! Dr. Nguyen has experience in newborn care, Trisomy 21, epilepsy and autism spectrum. She graduated from medical school in Vietnam, at Pham Ngoc Thach University of Medicine in Ho Chi Minh City in 2010.

Rose Ann V. Rayos, M.D.

Dr. Rayos is board-certified in pediatric medicine and joined the medical staff at Mason Health in July 2012, after completing her residency at Children’s Hospital at Monmouth Medical Center.

Binod Tuladhar, M.D.

Dr. Tuladhar is board-certified, and a Fellow of the American Academy of Pediatrics (FAAP). Before joining Oakland Bay Pediatrics in 2013, Dr. Tuladhar was an attending physician at Dickinson County Memorial Hospital in Iron Mountain, Michigan.

Frequently Asked Questions