Biography & Education


Philosophy of Care

Sleep issues have such a varied and far-reaching affect on patients - in their personal lives, the lives of their families and friends, their jobs, their past times... I am always glad when a patient has come in to see us at the sleep clinic, there are so many ways we can help. I am honored that patients trust us with their care.

Additional Information:

David Margelli is a board-certified Physician Assistant who received his medical training at Albany Medical College in Albany, New York.  A former paramedic, Mr. Margelli started his PA practice in general cardiology in 1999.  He has been practicing sleep medicine at Swedish since 2004.  

In addition, Mr. Margelli is also a clinical research investigator. The author of numerous articles on sleep topics, he is a frequent speaker at meetings for both community groups and medical providers. He has been an invited lecturer on sleep medicine at the American Academy of Physician Assistants national education conference.  

Additional Clinical Interests

Sleep apnea care, especially, in the setting of cardiovascular disease.

Education Background
Albany Medical College Physician Assistant Program; Master of Arts, Rockefeller College of Public Affairs and Policy, University at Albany
Professional Associations
American Academy of Sleep Medicine, American Academy of Physician Assistants
Personal Interests
In his free time, Mr. Margelli enjoys motorcyles and triathlon.

Care Locations

550 17th Avenue
James Tower, Suite A20
Seattle, WA 98122
Fax (206) 215-1135
Accepting New Patients
Accepting Medicare
Accepting Medicaid


Services Provided
Clinical Interests
  • Sleep Apnea
  • Sleep Disorders
  • Sleep Studies
  • Snoring Therapy