Michael Johnston, PA-C

With over 30 years of orthopaedic experience, Michael Johnston enjoys coming into work each day knowing that he is improving the lives of his patients and getting them back to what they love to do.

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…

Mark Zacharjasz, MD

Hospice Medical Director, Family Practice, Hospice

Dr. Mark Zacharjasz serves as Mahaska Health Hospice Medical Director and 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 life. Dr. Zacharjasz is passionate about helping patients and their families through…

Occupational and Public Health

Arthur grew up in Illinois and spent the last 5 years as an intensive care unit nurse at Northwestern Memorial Hospital in Chicago. Arthur graduated with honors from DePaul University with a Master of Science in nursing and went on to earn his Advanced Registered Nurse Practitioner license from North Park University School of Nursing.…

Joseph Whitman, DO

Ear, Nose, Throat, Visiting Specialist

Dr. Joseph Whitman is at Mahaska Health the 1st, 2nd & 3rd Friday every month. To schedule an appointment, call Surgical Associates, LLP at 641.236.2585. Specialty Ears, Nose, Throat Education A.T. Still University of Health Science, Kirksville, MO Residency A.T. Still University of Health Science, Kirksville, MO Location Visiting Specialist, Mahaska Health, Oskaloosa, IA