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Kelli J. Swenson, DDS, MS

Dr. Kelli J. Swenson was born and raised on a farm in Rolette, ND. She joined the United States Army National Guard in which she served while studing Biochemistry at the University of Minnesota, Morris.  Dr. Swenson received the Health Professionals Scholarship from the United States Navy and graduated from the University of Minnesota, School of Dentistry in Minneapolis, MN in 2007.   She attended a 12-month Advanced Education in General Dentistry residency at the Naval Dental Center in Great Lakes, IL then served two years as a General Dentist onboard the aircraft carrier USS Enterprise.  She completed her specialty training at the Naval Postgraduate Dental School in Bethesda, MD in 2012 and worked as an Endodontist for the Navy in Okinawa, Japan. Dr. Swenson and her family are excited to be back in North Dakota!

Ross A Yost, DDS

Dr. Ross A. Yost is a native of Webster, SD. He graduated from Creighton University School of Dentistry in Omaha, NE in 2008. Following dental school, he entered the Air Force and completed a one year Advanced Education in General Dentistry residency before serving three years as a general dentist in Alaska. From 2012-2014, Dr. Yost completed his specialty training in Endodontics at Keesler Air Force Base Medical Center in Biloxi, MS. His final duty station was in Suffolk, England, where he served as the Chief of Endodontics. Dr. Yost joined our team in 2017. He is a Diplomate of the American Board of Endodontics and is a published author in the Journal of Endodontics.

Michael D. Peterson, DDS, MS

Dr. Michael D. Peterson is a native of Aberdeen, SD. He received his B.A. degree in Mathematics from the University of Colorado at Boulder and graduated from Georgetown University School of Dentistry in Washington, D.C. He completed his specialty training in Endodontics at the University of Maryland in Baltimore. He is a Diplomate of the American Board of Endodontics and until he joined our team, he maintained a private practice in Silver Springs, MD. He is an outdoor enthusiast and enjoys playing the guitar.

Jerry M. Cook, DMD

Dr. Jerry M. Cook received his Doctorate in Dentistry at Oregon Health Sciences University in 2000. After dental school, he commenced active duty service in the U.S. Navy. He attended a 12-month Advanced Education in General Dentistry residency at the Naval Dental Center in Norfolk, VA. He then served for three years at the Branch Dental Clinic in Keflavik, Iceland. From 2004–2006, Dr. Cook completed his Endodontic training at the Baltimore College of Dental Surgery, University of Maryland. In July 2006, he opened Cook Endodontics, P.C. in Fargo, ND. Dr. Cook is a Diplomate of the American Board of Endodontics and is an active member of both local and national dental societies and study clubs.

Kristen-Office Manager

Kristen is the Office Manager for Cook & Swenson Endodontics. She is also the Office Manager at Cook Endodontics in Fargo, ND and has been in this position since the practice opened in 2006. She is originally from Glenwood, MN, but she has lived in Moorhead for many years. She obtained her Bachelor of Science degree from Minnesota State University Moorhead. She is married to Dan and has 3 children, Dusty, Devin, and Aaron. She enjoys reading, watching movies, and spending time with her family and friends.

Jessica-Administrative Assistant


Jessica grew up in Park River, ND but has resided in Mayville, ND for many years with her husband Jeremy and their two boys, Oliver and Liam. Jessica has worked in various health care settings throughout her career, including her past role as a nurse and most recently in the insurance industry. She enjoys watching her family as they participate in their many different sporting and music events, and enjoys when she gets to spend time outdoors and at the lake.

Hollie-CDA, RDA, LDA

Hollie grew up in Crookston, MN.  She moved to Fargo, ND in 2005 and completed her Dental Assisting eduation at MState in Moorhead, MN in 2011.  Hollie recently moved back to Crookston with her husband Garret and daughter Ramona.  She enjoys spending time with family, friends, dog and 3 cats.  She also enjoys the winter season as she has a love for figure skating.

Katie-Dental Assistant

Katie is originally from Lawrenceville, GA and moved to Grand Forks with her husband in June 2013 with his Air Force career.  Katie recieved her dental assisting certification in Georgia in 2010 and is currently working on her certification for North Dakota.  Outside the office Katie enjoys cooking/baking, crafting, hosting gatherings with friends and family, and spending time with her husband, corgi and bearded dragon.


Britta grew up in Devils Lake, ND and now lives in East Grand Forks, MN. She attended dental assisting school in Bemidji, MN.  Britta enjoys bringing her dog Ruger on walks and spending time with her husband Michael, family and friends.