Dr. Chen was raised in New York State. After receiving his undergraduate degree from Dartmouth College in New Hampshire, he moved back to New York to attend medical school at SUNY Stony Brook. He went on to complete his internship and residency in Internal Medicine at Yale New-Haven Hospital. Since then he has been at Stanford University Medical Center, where he completed a clinical fellowship in Pulmonary and Critical Care Medicine, as well as a fellowship in Sleep Medicine.

Dr. Chen is Board-Certified in Sleep Medicine, Internal Medicine, Pulmonary Diseases, and Critical Care Medicine. He serves as co-Medical Director of the Sleep Center at Valley Medical Center and has a special interest not only in all aspects of adult sleep medicine, but also narcolepsy and pediatric sleep disorders.

Dr. Chen enjoys living on the west coast and looks forward to being in the Puget Sound area. His interests include music, tennis, and other outdoor activities.

Surafel Gezahegne, MD, is board-certified in Internal Medicine, Pulmonary Diseases and Critical Care Medicine. He believes a strong patient-physician relationship is vital to patient care. He strives to provide the highest standard of care to his patients.

Dr. Gezahegne takes care of patients with lung diseases including asthma, COPD, sarcoidosis, pulmonary hypertension, interstitial lung disease and lung cancer. He performs bronchoscopy including endobronchial ultrasound (EBUS) to diagnose and stage cancer. Dr. Gezahegne also works in the intensive care unit (ICU) taking care of critically-ill patients.

Dr. Gezahegne was born and raised in Ethiopia. He moved to Washington State in 2001. He received his bachelor’s degree in microbiology and his medical degree from the University of Washington. He completed his Internal Medicine residency at Loma Linda University Medical Center in Loma Linda, California and his fellowship in Pulmonary and Critical Care Medicine at Henry Ford Hospital in Detroit, Michigan. In his spare time, Dr. Gezahegne enjoys playing soccer and racket ball as well as hiking and biking.

Dr. Krell graduated from Case Western University in Ohio with a major in biomedical engineering. She earned her medical degree from Washington University in Missouri and completed her internal medicine residency at Duke University. In 2003, Dr Krell completed her fellowship training in pulmonary, critical care and sleep medicine at the University of Washington. Her research interest was investigating the interactions between insomnia disorders and sleep apnea.

Dr. Krell spent a year working as a pulmonary specialist in New Zealand, where she helped develop a sleep medicine program. She joined Southlake Clinic in 2004 splitting her time between hospital duties as an intensive care physician and clinic work in sleep and pulmonary medicine. In 2005 she took on the role of Co-Medical Director of the Sleep Center at Valley Medical Center. Dr Krell has a special interest in women's sleep health and early recognition and treatment of sleep apnea in individuals with or at risk for heart disease.

Dr Krell is happily settled in Renton with her husband and two small children. In her spare time she remains active with soccer and running and enjoys travel and reading.

Dr. Park is originally from Michigan and graduated from Cornell University as a chemical engineer. After a change in career direction, he returned to Michigan to attend the University of Michigan Medical School. From there he did his residency in Internal Medicine at Boston University and Boston City Hospital. Trading snow for rain, he moved to Seattle, where he completed his fellowship in Pulmonary and Critical Care Medicine at the University of Washington. His clinical interests include the management of COPD, lung cancer, interstitial lung disease, asthma, sarcoidosis and all aspects of sleep disorder medicine.

Dr. Park has been the Co-Medical Director of the Sleep Center at Valley Medical Center, Medical Director for Respiratory Care at Valley Medical Center, Co-Medical Director of the Critical Care Unit as well as a member of Valley Medical Center's Executive Committee. He is board-certified in Pulmonary Diseases, Critical Care Medicine, Sleep Medicine and Internal Medicine. He has also been listed in "Seattle's Best Doctors."

Dr. Park and his wife have three young children. They enjoy spending time outdoors as much as possible and with each other.

Undergraduate: Cornell University
Medical School: University of Michigan
Residency: Boston University
Fellowship: University of Washington