If you develop symptoms or think you have been exposed to COVID-19, please call our COVID HOTLINE at 712-246-7020 BEFORE you go to the clinic.

Walk-In Clinic

Family Nurse Practitioner

I am a board certified Nurse Practitioner specializing in family practice. I have been a nurse for 14 years, working my way up through my degrees from LPN, RN, BSN, and MSN in that time. I have worked with all ages of patients in a wide range of setting in my nursing career including, acute care, surgical care, long term care and occupational health care. I am also a Certified Health Coach and have done individual and community wellness coaching.
I have worked at the Shenandoah Medical Center for 8 years as a nurse in women's health, as a surgical nurse, as the Occupational Health nurse/wellness coach and now as a family practice provider in the Walk-in Clinic. I am so happy to continue my career here at SMC, and can't imagine a better facility, community or patients!
My hobbies include traveling and spending time with my husband (Kasey) and our children (Ethan, Aubrey, Ava, and Charly). I also enjoy fitness and exercise regularly and make it a huge part of my life.

Family Nurse Practitioner

Mary Kay Nissen is a Clinical Associate Professor in the Graduate Program at South Dakota State University. She has many years of experience in both undergraduate and graduate nursing education. Ms. Nissen has practiced as an Advanced Practice Provider in Family Health Care since 2009. Her expertise is in Rural Health Care, Occupational Health and Urgent Care. As well as teaching full-time, she maintains a part-time practice in urgent/acute care in a rural community in Iowa. Ms. Nissen received her undergraduate and master’s degrees from the University of Iowa, a post master’s degree from Briar Cliff University in Sioux City, Iowa and her Doctorate of Nursing Practice from Creighton University in Omaha, NE.

1 Jack Foster Drive

Shenandoah, IA 51601


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Clinic Hours

Monday-Friday: 7-5:00pm

Walk-In Clinic Hours

Monday-Friday: 8-6:30pm Saturday-Sunday: 9-12:30pm