Medical Group - Ventura Park Medical Group - Ventura Park 11510 SE Stark St. Portland, Oregon 97216 Fax:503-408-7034 For Appointments call 503-256-0636 Hours 8 a.m. to 5 p.m., Monday-Thursday 8 a.m. to 3 p.m., Friday Specialty Family Medicine Physicians A. Randolph Bulger, MD Roberta A. Bulger, MD Henry R. Rivas, MD Gregory C. Scribner, MD View Larger Map Health Plans Accepted Most major health plans are accepted. Please call to verify if a particular insurance plan is accepted.