SITEMAPHomeAbout Dr. KossOsteopathyContact UsSitemapRichard W. Koss D.O., PLLC23220 Maple Valley HwySuite #101Maple Valley, WA 98038 Get Directions Write A ReviewContactPhone: 425-433-6073Fax: 425-433-6074Email: rwkossdo@comcast.netHoursMonday - Friday: 10 AM - 6 PMFollowFollowFollow