Medical Group - Cascade Park Medical Group - Cascade Park 406-A SE 131st Ave., Suite 104 Vancouver, Washington 98683 Fax: 360-254-2894 For Appointments call 360-896-6944 Hours 8 a.m. to 5 p.m., Monday-Thursday 8 a.m. to 4 p.m., Friday Specialties Family Practice Internal Medicine Physicians David T. C. Lee, MD Cheri N. Oellrich, MD Karen R. Williams, MD View Larger Map Health Plans Accepted Most major health plans are accepted. Please call to verify if a particular insurance plan is accepted.