Oncology Medical Director

Dr. Daniel Kollmorgen serves as the Oncology Medical Director at Mahaska Health. He has over 20 years of experience as a physician and it is his passion to bring expert, compassionate care to his community. Dr. Kollmorgen studied medicine at the University of Iowa and completed a surgical oncology fellowship at Roswell Park Cancer Institute.…

Lindsey Herny, RN

Director Surgery Services

General Surgeon

Dr. Jesse Van Maanen joined the Mahaska Health surgical team as a Board Certified General Surgeon. Dr. Van Maanen grew up in Pella and Leighton and enjoyed the small communities in which he lived for their rural opportunities, close-knit friendships, and family values. He was first exposed to medicine and surgery when he had to…

General Surgery

Rachel is a board certified Physician Assistant with a strong background in surgical services. Rachel joined the Mahaska Health general surgery team in 2020. She earned her Master of Science in Physician Assistant Studies from Marietta College in Ohio. She most recently worked at Fairfield Medical Center in Cardiothoracic Surgery and holds years of clinical…

Paul Riggs, MD, FACS

General Surgeon

Paul Riggs, MD, FACS, has been serving the Mahaska community since 1985. A native of Illinois and after receiving his training in Kansas, Dr. Riggs chose Mahaska county because of its need for a surgeon to serve the community. Dr. Riggs has always enjoyed science, biology and chemistry, which lead him toward a pre-med education.…