Tonya Horn – CPNP-PC. Tonya was born and raised in Iowa as an Oskaloosa native. As a former emergency room nurse, Tonya now serves patients in the Family Medicine and Walk-In Clinic at Mahaska Health. With many years of experience and her compassionate outlook, Tonya is a valued member of our team and our…
Dr. Preston Sereg, Family Medicine Physician serves the Mahaska Health community as a Family Medicine Physician. Dr. Sereg was born and raised in Oskaloosa and has worked in healthcare for the past 9 years. Dr. Sereg chose to practice at Mahaska Health because he wanted to take part in and give back to the community…
Stephen Mineart, MD, has served the Oskaloosa community as a primary care physician since 1987. Dr. Mineart was drawn to the medical field because of his love of science and biology and enjoys building a longitudinal relationship with his patients, learning who they are and hearing their stories. In his more than 32 years at…
Tonya Johannes, DNP, ARNP-BC has been a nurse practitioner at Mahaska Health since 2016 and has served the healthcare field since 2003 in nursing home, hospital and clinical settings. Johannes grew up in Albia, IA and chose the medical field after spending an entire summer in a hospital helping to care for her grandmother. She…
Jana Galbreath, DNP-FNPc, ARNP serves both the Walk-In and Primary Care teams. Jana began her career as a nurse in 2004, and since then earned her Bachelor of Science in Nursing from the University of Iowa College of Nursing in 2015, and most recently graduated with her Doctorate of Nursing Practice – Family Nurse Practitioner…
