2700 NW Stewart Pkwy Roseburg, OR 541-677-1527. Galen Inpatient Physicians. Douglas Anderson, MD. 2801 NW Mercy Dr, Suite 300 Roseburg, OR 541-677-1555. Centennial Medical Group LLC- Mercy Heart Group. Syed Athar, MD. 2801 NW Mercy Dr, Suite 300 Roseburg, OR 541-677-1555..