Daniel E. Marsh, M.D. Dr. Marsh is a native of Portland, Oregon. He earned his medical degree at Oregon Health Sciences University in Portland, Oregon, and completed his residency and internship in internal medicine at Good Samaritan Hospital in Portland. He completed his nephrology training at Indiana University in Indianapolis, Indiana. Dr. Marsh is board-certified in internal medicine and in nephrology, and is a member of the East Baton Rouge Parish Medical Society, the Louisiana State Medical Society, the American Society of Nephrology and the American Society of Diagnostic and Interventional Nephrology.