Meet Our Wonderful Dentists


Otto Hanssen DDS

Otto Hanssen DDS

University of Washington

 Dr. Otto Hanssen was born and raised in Bellingham, Washington. He undertook his undergraduate studies at Western Washington University with an emphasis in Chemistry.  Dr. Hanssen then studied and received his dental degree from the University of Washington in 1979.  After a long dental practice partnership, he founded Cottage Lake Family Dentistry in 1992.  Dr. Hanssen is active in most areas of general dentistry with a concentration on more complex reconstructive cases.  He enjoys spending time with his lovely wife of 28 years and their three grown children, traveling to warmer climates, and boating in the Puget Sound San Juan Islands.

Patricia Nguyen DDS

Patricia Nguyen DDS

University of Minnesota

  Dr. Patricia Nguyen was born and raised in Edmonton, Alberta, Canada and completed her undergraduate studies at the University of Alberta in 2010. She attended the University of Minnesota where she received her DDS degree in 2014. Patricia then completed a postgraduate residency program in Advanced Education in General Dentistry at the University of the Pacific in Union City, CA in 2015. She moved to Washington shortly there after and join Cottage Lake Family Dentistry. Patricia is a winter sport fanatic and enjoys being close to the mountains.  

Gregory Wang DDS

Gregory Wang DDS

NYU College of Dentistry

Dr. Gregory Wang was born and raised in East Bay California. After graduating from University of California, Los Angeles with a degree in Physiological Science, he traveled across the country to excel at NYU College of Dentistry. He completed a postgraduate General Practice Residency at NYU Langone in Brooklyn, NY in 2014. Striving to provide patients with utmost quality of care through continuing education, Greg is a member of Academy of General Dentistry and received his Fellowship in 2017. He is fluent Mandarin and conversational Spanish. When not practicing dentistry, he and his wife enjoy outdoor activities such as hiking, tennis, and skiing.

 Christen Kartaltepe DDS

Christen Kartaltepe DDS

Trinity University

Dr. Christen Kartaltepe was born and raised in Longview, Texas. She graduated from Trinity University in San Antonio, Texas with a degree in Computer Science. After working as a software developer for several years, she attended dental school at the University of Texas Health Science Center in San Antonio and received her DDS degree in 2012. When not practicing dentistry, Christen enjoys spending time her husband and two daughters, rowing, and hiking.