Meet The Doctors

Dr. Wertz and Dr. Schemmel are dedicated to providing the highest quality care possible to you and your family. Learn a little more about them below.


Dr. Joe Wertz


Dr. Joe Wertz attended the University of Iowa for his undergraduate studies and continued his education at the University of Iowa College of Dentistry where he graduated with his Doctor of Dental Surgery in 2010. Since graduation, Dr. Joe has continued his study of general dentistry through numerous continuing education courses every year. Dr. Joe’s commitment to dentistry continues with his memberships to the Iowa Dental Association, Dubuque Dental Society, American Dental Association, Academy of General Dentistry, Chicago Dental Society and Great River Implant Study Club.

Dr. Joe and his wife Moe settled in Dubuque in 2010 and he joined his father, Dr. Tom, and Uncle, Dr. Mike, at Wertz and Wertz Dental Associates. Dr. Joe became a partner at the practice in 2012.

Dr. Joe and his wife have two children, Gus and Madeline.

When Dr. Joe is away from the office during the summer months, you can find him on the waterways of Iowa with his family and friends boating, tubing, skiing, jet skiing, fishing and generally spending time outdoors! In the winter months, Dr. Joe spends his time in his garage “wrenching” on his vintage stand-up jet skis, always attempting to get them running a little faster. While working on his jet skis, his motto is “if it is not broken, fix it until it is!”


Dr. Mark Schemmel


Dr. Mark Schemmel, a native of Dubuque, attended Saint Norbert College in De Pere, Wisconsin for his undergraduate studies where he graduated with a Bachelor's degree in science in 2014. Following college, Dr. Mark began his dental education at The University of Iowa College of Dentistry and graduated in 2018 with his Doctor of Dental Surgery. Dr. Mark is active in the dental community as a member of the American Dental Association, Iowa Dental Association, Chicago Dental Society, Dubuque Dental Society, where he serves as Treasurer, and The Academy of General Dentistry.

Dr. Mark's wife, Chandler (Flynn), is a native of the Dubuque area and is the manager of Orangetheory Fitness Dubuque. When not in the office, Dr. Mark enjoys spending time traveling with family, watching any and all sporting events, and walking with Chandler and their Goldendoodle, Blanche.


Meet The Hygienists

Our Team of Registered Dental Hygienists

With over 60 years combined experience in the field of Dental Hygiene, our group of dental hygienists is incredibly qualified to provide superior care to all of our patients.


Michelle Doerges, RDH


Elaine Schemmel, RDH


Rachel Guentherman, RDH


Meet The Front Desk and Assistants

From scheduling appointments and assisting with insurance, to working chairside and behind the scenes to make your experience a great one, our team of dental assistants do whatever it takes to make your visit to our office as simple and comfortable as possible.


Chandra Kono


Kristin Chrest


Emilie Bellrichard


Becky Hammer