Kofi Osei, MD, MSc is Board Certified in Cardiovascular Disease and Clinical Cardiac Electrophysiology. He provides expert care for conditions including heart failure, hypertension, arrhythmias, coronary artery disease, and complex cardiac health needs. Dr. Osei earned his medical degree from the University of Ghana Medical School and completed his residency in Internal Medicine at St.…
Ronald Collins, MD is a board-certified Hospitalist at Mahaska Health specializing in Internal Medicine. He earned his Doctor of Medicine at Ross University School of Medicine in Iselin, New Jersey and completed his Internal Medicine residency at the University of Illinois College of Medicine, Peoria OSF-Saint Francis Medical Center in Peoria, Illinois. He brings extensive…
Joseph Rowane, DO is a fellowship-trained, board-certified Sleep Medicine specialist and Mahaska Health Sleep Medicine Director. Dr. Rowane earned his Doctor of Osteopathy degree from the University of Osteopathic Medicine and Health Sciences in Des Moines, Iowa, after completing a Bachelor of Science at Gannon University in Erie, Pennsylvania. He went on to complete his…
Ruffin Tchakounte, DO specializes in Internal Medicine as a Hospitalist. He earned his Doctor of Osteopathic Medicine and Master of Science in Anatomy from Des Moines University, and his Bachelor of Arts in Chemistry from the University of Iowa. Dr. Tchakounte completed his Internal Medicine Residency through the University of Iowa, in the UnityPoint Health…
Nick DeMark, DO is a board certified and fellowship-trained Hospice and Palliative Care physician and serves as Palliative & Hospice Medical Director at Mahaska Health. He earned his medical degree from Des Moines University in Des Moines, IA and completed his residency in Internal Medicine at the Western Michigan University School of Medicine in Kalamazoo,…





