2801 NW Mercy Dr, Suite 300 Roseburg, OR (541)677-1555. Centennial Medical Group LLC- Mercy Heart Group. Kirstin Carhart, CNM. 150 NE Kenneth Ford Dr Roseburg, OR 541-672-9596. Aviva Health Center - Roseburg. Erin Cassidy, FNP. 2801 NW Mercy Dr, Suite 300 Roseburg, OR 541-677-1555..