Meet The Doctors

Dr. Courtney Dembiec, DDS


Dr. Dembiec is originally from Racine, Wisconsin but she also lived in Virginia and Georgia while growing up. She went to the University of Wisconsin – Madison for her undergraduate studies and received her dental degree from the University of Michigan. She and her husband, Chris, have a little girl, Harper, and a little boy, Graham, that keep them very busy. When time allows, they love any outdoor activities including biking, running, and hiking. They also enjoy spending time visiting their families and traveling as much as possible.

Dr. Michelle K Stewart, DDS


Dr. Stewart is also a native Minnesota resident. She did live in Iowa for some time where she received her degree from the University of Iowa. She practiced in the Twin Cities for two years prior to relocating to Winona to join River Hills Dental in 2004. She and her husband Dave have three children, Maren, Gabriel and Samuel. She enjoys spending time with her family and when time allows, she is an avid scrap booker and sports fan.

Dr. Andrew Geislinger, DDS


Dr. Geislinger was raised in Grand Rapids, Minnesota. He attended Winona State University to obtain his undergraduate degree. During his stay in Winona, he played baseball for the Warriors. More importantly, he met his wife, Stephanie, a Warrior gymnast. They have a daughter named Avery.

Andrew graduated from Creighton University in Omaha, NE. While excited about all aspects of dentistry, he is very interested in Oral Surgery, especially extractions and implant placement. Throughout the past two years, Dr. Geislinger has participated in an intensive 300 hour AAID dental implant Maxicourse. He hopes to attain his fellowship with the AAID in the coming years. With this advanced education, he is excited and ready to serve our patients with this treatment.

He and Stephanie are thrilled to be back to in the Winona community.  In his spare time, Andrew enjoys spending time with his family and hunting with his yellow lab, Jay. When not doing this, you can find him fishing, golfing, and coaching youth sports.