Walk-In Clinic, Pediatrics & Primary Care

Tonya Horn – ARNP. Tonya was born and raised in Iowa as an Oskaloosa native. She will begin serving patients at Mahaska Health as a Pediatric Nurse Practitioner after years of providing care for the community in our Emergency Room as an RN. Tonya started her nursing career in a Pediatric Intensive Care Unit and…

Family Practice, Obstetrics

Hannah Thompson is serving Mahaska Health as a Family Practice and Obstetrics Physician. Having grown up in the Midwest, Hannah is excited to begin serving Oskaloosa and the surrounding communities with her fellow residency peers, Drs. Preston Sereg and Eric Wood. Dr. Thompson treats her patients as she would treat her closest family members, bringing…

Family Practice, Obstetrics

Dr. Preston Sereg – Family Practice & OB Physician serves the Mahaska Health community as a Family Practice with Obstetrics 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…

Family Practice, Obstetrics

Dr. Eric Wood – Family Practice & OB Physician will be serving the Oskaloosa community with his passion for treating rural Iowans with quality care, close to home! Eric is an Oklahoma native and was born and raised in a rural community, so Mahaska Health gives him that comfort of home! Eric chose to become…

Pediatrics, Family Practice

   

Mark Zacharjasz, MD

Family Practice, Hospice

Dr. Mark Zacharjasz chose a career in family medicine due to his love of helping people and science. At Mahaska Health, Dr. Zacharjasz believes in offering his patients the best possible treatments and advice while upholding their values and autonomy. He accomplishes this by understanding each patient as a whole through the context of their…

Family Practice & Walk-In Clinic

  Leah VanLoon, ARNP serves as a provider for the Walk-In and Primary Care clinics at Mahaska Health. VanLoon is from the Eddyville area and joined Mahaska Health with 16 years of prior nursing experience, most recently having worked as a Nursing Supervisor at ChildServe in Johnston, Iowa. She began her nursing education at Indian…

Jess Tokle

Family Practice

Family Nurse Practitioner Jessica Tokle decided to go into medicine because she enjoys helping patients and learning from them. Originally from Grinnell, Jessica is excited to be close to home again. During her first year of college, she discovered her passion for nursing and decided to obtain her masters in nursing. Jessica received her Family…

Tara Stout, DNP, ARNP

Family Practice

Tara Stout, DNP, ARNP joined Mahaska Health in December 2019 after receiving her Doctorate of Nursing Practice from Clarke University in Dubuque, Iowa. Many may know her as she spent some time at Mahaska Health during her clinical rotations with Dr. O’Brien and Tonya Johannes. Tara grew up in Sully, Iowa and lives on a…

Shawn Richmond, MD

Family Practice, Obstetrics

Shawn Richmond, MD, has been serving the Mahaska Health community in areas of primary care and obstetrics since 2000. Originally, from Ottumwa, he chose to practice at Mahaska Health in order to be close to family and because of the great atmosphere of the community. Dr. Richmond is well known for the care and concern…