Mark S Yerby, MD Specialist Specialty: Neurology Contact Information Practice Name: North Pacific Epilepsy Research Office Locations Primary Address North Pacific Epilepsy Research 2311 NW Northrup, Ste 202 Portland, OR, 97210 Phone: 503 291-5300 Fax: 503 291-5303 Hospital Locations Primary Address Legacy Good Samaritan Medical Center 1015 NW 22nd Ave. Portland, OR, 97210 Phone: 503-413-7711 Toll-Free: 1-800-733-9959