Cassie Johnson


Patient Care Coordinator

I was born and raised in Helena, MT. I began working in the dental field in Spokane, WA at a pediatric clinic. It was here that I realized my love for working with people. I thoroughly enjoy developing and nurturing the relationships with our patients. My responsibilities at Modern Smiles include welcoming patients, conveniently scheduling treatment for them, answering their insurance inquires, and managing daily business tasks.



ND became my home in 2015 when I married Jeff. We share 3 boys: Kody, Corey and Brock and were blessed with a grand-daughter, Ava, in June of 2019. Family is my foundation and I cherish the time spent going to Spokane, WA to see my Mom, son Corey and granddaughter, Ava. Kody drives semi and bought a home in Watford City. My favorite past-times include motorcycle riding, going to rock concerts, gardening and watching football.

Ashley Pearson


Dental Assistant

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 2 boys: Karter and Max. They keep us busy with travel baseball in the summer. During school, they play football, basketball and baseball. When we have a free moment, we enjoy spending time with family and catching up with friends.

Jackie Houn


Dental Assistant

I am a Dickinson, ND native, however, I lived away for 26 years. My 30+ years of dental experience include exposure to orthodontics, oral surgery and general dentistry. I love the quaint atmosphere of Modern Smiles and the personal care we can give our patients. I am happy to call it my home away from home.  


My husband, Mark, and I moved back to ND in 2012 from Michigan, where we raised our boys, Joshua & Aaron. Our family has grown over the last 8 years as I have gained a stepson, Thomas, a daughter-in-law, Amy and 2 adorable granddaughters, Ava and Olivia. In 2021 & 2022, we welcomed two more fabulous daughters-in-law, Molly and Carley Jo! Large families are familiar to Mark and I, so it warms my heart watching ours grow! My free time is spent enjoying the outdoors and beautiful open skies of ND, meeting with my Bible study group: Wine, Women & the Word, spending time with my family and sisters, and taking Wilken, my goldendoodle, for walks. 

Devon Duewel


Dental Hygienist

I grew up in Lambert, MT and graduated from NDSCS-Whapeton in 2005. I’ve worked with Dr. Heidi since 2006 providing compassionate care to our patients. I pride myself in delivering quality oral care, being honest with patient recommendations, and making patients feel comfortable while in my care. The best part of my day at Modern Smiles is nurturing the personal relationships I have developed over the years of practicing dental hygiene.  


I have 3 little boys: Konrad, Kavik and Kroy. Two in school is a change for us all, but we’re settling into a routine. Chaos currently rules my life, but occasionally I have some free time to watch the boys play sports, spend time with family and friends or sneak in a little traveling when I can.

Megan Larson


Dental Hygienist

Being a hygienist is very rewarding! I love seeing the smiles on my patients’ faces when they have clean, healthy teeth and gums. Creating a comfortable experience, while in my care, is one of my strengths. I make a point of thoroughly educating my patients about their specific home care needs, as I feel this establishes confidence in me, and confidence in the care they receive at Modern Smiles.


I have lived in Bismarck since 1996. I earned my hygiene degree from St. Cloud Technical College in 2009. My husband and I have a daughter and a son. They keep us busy running to activities they’re involved in. I am active as a mentor in the elementary program at Gracepoint Church. Our family enjoys camping, fishing, hunting, snowmobiling, snowboarding…almost anything outdoors! When the weather cooperates, I enjoy riding on the back of my husband’s motorcycle or in the passenger seat of his airplane.

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