At Dr. Valentine's office, we recognize that your choice of a dermatologist is driven both by the doctor's competency and personality. When searching for dermatological treatment, you need a dermatologist who is experienced, understanding and supportive. You get this caring attitude from all the staff at Dr. Valentine's office every day. Our staff works together as a team to be sure we are responsive to your needs and keep you informed about your health issues. We look forward to getting to know you.

Mark C. Valentine, MD

Dr. Valentine has lived in Snohomish County since 1979. He graduated from Johns Hopkins University School of Medicine, and did postgraduate training in internal medicine and dermatology at University Hospitals in Cleveland, OH.  He is certified by the American Board of Dermatology. Dr. Valentine is a member of numerous professional organizations, having served as president of the Seattle Dermatological Society, Washington State Dermatology Association, and Snohomish County Medical Society.

Dr. Valentine has received numerous honors, including recognition as a National Merit Scholar, Phi Beta Kappa membership, and designation as Top Doctor or Best Doctor by several organizations and magazines. He is Clinical Professor of Medicine (Dermatology) at the University of Washington School of Medicine.  In addition to other interests, he has written and lectured on the history of dermatology and is an avid book collector.

To learn more about Dr. Valentine’s education, hobbies and perspectives,  you can visit the following links:

Read Dr. Valentine's CV

Read an interview with Dr. Valentine in The Dermatologist. .

Learn about Dr. Valentine's hobbies in Dermatology World

Practice Manager

North Sound Dermatology practice management staff are located in the Mill Creek office, and if you have billing questions about services received after May 1, 2018, you should notify that office using contact information on the North Sound website: https://www.northsoundderm.com...

Ancillary Staff

Our phototherapy assistants and back office staff including Laura, Shelly, and Grace, are all qualified medical assistants with years of experience in medical office work.