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Dr. Heidi Nichols-Johnson

I was raised on a farm and ranch near Stanley, ND, the youngest of four girls.  After graduating from high school in 1996, I attended NDSU earning my undergraduate degree in 2000.  My interest in the dental field piqued while in Fargo when Dr. Byrum Cartwright allowed me to volunteer, and eventually work, in his dental office.  It was an invaluable opportunity that gave me an up-close and personal feel for a dental career. I attended the University of Minnesota Dental School and graduated in 2004.  My ND roots pulled me home and I was fortunate enough to join Dr. Leonard Garceau in practice here in Bismarck.  It was an amazing opportunity and I will forever cherish the 10 years I spent at Dakota Family Dental.  In 2015, I opened Modern Smiles, and thanks to a wonderful and dedicated team, it has been a dream come true.  I am truly able to be passionate about caring for people, smiles and all.Professionally, I serve on the boards of the North Dakota Dental Foundation and Bridging the Dental Gap.  I also serve on a dental advisory committee for Blue Cross Blue Shield Insurance Company.  My husband, Ryan, and I were married in 2000 and have 3 children: Jack, Caleb and Ainsley. In my time away from Modern Smiles, I can be found chasing my children around to hockey arenas in the winter and baseball fields in the summer. I very much enjoy spending time on the pontoon, riding horses, gardening, shopping, and attending NDSU football games with my extended family.


Our Dental Hygienists

Devon Duewel


Deb Meyhoff

I grew up in Lambert, MT and graduated from the Dental Hygiene program at NDSCS-Whapeton in 2005. I started working for Dr. Heidi in 2006 at Dakota Family Dental. In 2010, I moved to Denver, CO for 3 years before coming back to work for Dr. Heidi again in 2013. Providing quality care, being honest and making patients feel comfortable have always been my top priorities as a hygienist. At Modern Smiles, I know that is exactly what patients will get and more from Dr. Heidi and our caring staff. In my free time, I enjoy being on the water and soaking up the sun, traveling, camping and snowboarding. I live in Lincoln with my husband, Derek and our son Konrad.

I graduated from NDSCS-Whapeton and have been practicing dental hygiene since 1982.  I love to meet new people and treasure the friendships I have made over the years while working in the dental field.  I currently reside in Hazen with my husband Terry, our two 2 children~Kaitlin and McKeon and my new grand-daughter, Deveraux.  My new favorite hobby is spending as much time as possible with Deveraux, but I also enjoy watching movies with a big bowl of popcorn, photography, collecting antiques, baking, sports, and enjoying a big cup of coffee with anything chocolate.


Our Dental Assistants


Ashley Pearson



Jackie Houn

I'm originally from Watford City, ND and graduated from the Dental Assisting program at NDSCS-Whapeton in 2003.  I have worked with Dr. Heidi since 2004. One of the things I most enjoy about my job is meeting new patients and getting to know them personally, not just dentally.  There are many patients I have formed close relationships with over the years and I look forward to continuing those relationships, as well as developing new ones. My husband, Jason and I have two boys, Karter and Max. When we aren’t running the boys to football, baseball or hockey we enjoy watching NDSU football, going on the pontoon and spending time with friends and family.

I was born and raised in North Dakota, but lived in Michigan for 23 years, where I graduated from Dental Assisting School and raised my family.  My husband, Mark, myself, and our two boys, Joshua and Aaron, recently relocated back to North Dakota in 2012 to be closer to our families.  I have 20+ years of dental, orthodontic and oral surgery experience.  I love the small quaint atmosphere of Modern Smiles and the personal care we can give our patients.  I am glad to call it my home away from home.  In my free time I love walking my dog, Conroy, and spending time with my sisters and extended family.


Our Patient Care Coordinator


Cassie Johnson

I was born in Helena, Montana where I lived until 1995 and then moved to Spokane, WA where I lived for almost 20 years raising my two boys, Kody and Corey.  While in Spokane, I worked for 7 years in the dental field, most of that time was spent in a pediatric practice. In 2015, I moved to North Dakota with my sons.  Since moving to ND, I met and married a wonderful man, Jeff.  We spend our spare time traveling, going to concerts and have recently been bitten by the camping bug!  I especially love being outside any time of year, whether it is for snowmobiling or watching my boys play baseball.  I joined Modern Smiles in mid-2015 and have enjoyed being part of this dental family.  I enjoy meeting so many wonderful people and having the opportunity to watch families grow while we care for them.  Being part of the dental community has taught me so much and Dr. Heidi has given me many wonderful opportunities since becoming a part of the Modern Smiles family.  I cherish the relationships I have already made and look forward to caring for you and your families!