Nicola Preston, DO is a board-certified emergency medicine physician with extensive experience caring for patients across Iowa. Dr. Preston attended medical school at Des Moines University College of Osteopathic Medicine in Des Moines, IA and completed her Emergency Medicine Residency at University of Iowa Hospitals in Iowa City, IA. Throughout her career, Dr. Preston has…
Drew Richmond, MD, is a general surgeon with training in both minimally invasive and traditional surgical techniques, including robotic-assisted and laparoscopic procedures. Dr. Richmond earned his medical degree from the University of Kansas School of Medicine and completed his general surgery residency at Iowa Methodist Medical Center, where he also completed rotations at Mahaska Health.…
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…





