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The Washington Care Clinic Team

Dr Brett Mehringer

Dr. Brett Mehringer, DC

Dr. Brett Mehringer did his undergraduate studies at Indiana State University and completed his Doctorate of Chiropractic from Logan University, St. Louis in 2002. He has over 17 years of experience and has operated his Washington office since 2003. He's a true expert in his field and very committed to helping all generations live happier and healthier. With his drive and enthusiasm, you will always know that you are the most important person in the room. His commitment to his patients, their families, and our community shows his caring heart for helping people live a lifestyle of wellness.​​ Dr. Brett values giving back to others, from trips with Veterans, supporting our law enforcement teams, local charities and our schools to list a few. Dr. Brett is also a proud member of the Missouri State Chiropractic Association.

Dr. Brett lives in Washington with his two daughters, Olivia and Ellie, and his dog Lucy. He enjoys running marathons, music, traveling and spending time with his family.


Dr Brant Riegel

Dr. Brant Riegel, DC

Dr. Brant Riegel joined the practice in November 2019. He graduated from Eastern Illinois University in 2009 with a Bachelor’s degree in Biology. He obtained his Doctorate of Chiropractic from Logan University in 2013 and has practiced in Illinois for five years before returning to Missouri. Dr. Riegel is excited to be back in the St. Louis area and is happy to have joined the Mehringer Chiropractic team.

Dr. Riegel is certified in Webster technique that helps pregnant mothers, and is working towards his diplomate in Chiropractic Pediatrics. In addition to Webster, he is specializes in Diversified, Thompson, Activator, Logan Basic, Graston, and Flexion Distraction. Dr. Riegel takes pride in being a chiropractor and having the opportunity to improve the quality of life of his patients.

Dr. Riegel and his wife, Daniela, have two children, Isabela and Trent. In his free time, Dr. Riegel enjoys spending time with family and friends. Dr. Riegel loves watching movies in the drive-in theater, traveling, playing board games, and telling silly dad-jokes.


Dr Madison Roberts

Dr. Madison "Maddie" Roberts, DC

Dr. Maddie is a Des Moines, Iowa native. Her education began at Wartburg College, where she received her Bachelors in Biology, graduating on the Dean’s List. During her collegiate years, she was a national ranked cross country and track runner. It was her running experience that introduced her to the world of chiropractic, and she knew instantly that this was the career she was meant for. She went on to graduate from Logan College of Chiropractic with her Doctorate of Chiropractic.

She served on the executive board of the business sorority, Lambda Kappa Chi, at Logan. While obtaining her chiropractic degree, she furthered her education with outside courses and certifications in Cox-Flexion Distraction, Thompson, Graston, McKenzie Diagnostic Technique (MDT), and Acupuncture. Throughout her clinical and educational endeavors, she developed a passion to help her patients live a healthier and happier lifestyle. Whether it’s getting back to the sport you love, being able to keep up with your children, or simply getting through the workweek pain-free, Dr. Maddie will be by your side along the way.

Dr. Maddie resides in Ballwin with her husband, Mitch, and two dogs, Koda and Octavia. In her free time, she enjoys running, going on walks with her dogs, spending time with her family and friends, enjoying Mexican food, and traveling.


Izzie Kunz

Izzie Kunz, Nurse Practitioner

Izzie Kunz, FNP-C completed her undergraduate education at East Central College, ADN Class of 1993 and University of MO-Columbia, RN-BSN Class of 2008, and completed her Master of Science in Nursing at Maryville University, St. Louis, MO, in 2017, graduating with a 4.0 GPA. She is a member of the Sigma Theta Tau Honor Society of Nursing Omicron Iota Chapter. Izzie has 28 years nursing experience, including emergency and critical care for all age groups. Izzie has worked in urgent care as an FNP, and is excited to have joined the Washington Care Clinic family in 2020 as part of the regenerative medicine team. She has received intensive training in Peri facet, Orthopedic and Aesthetic techniques.

Izzie is passionate about the care she provides, as well as in allowing the patient to have a voice in his/her care. She chose regenerative medicine as her path, as this provides her patients a chance at obtaining a fuller, healthier life without pain.

Izzie lives in rural Hermann with her husband Kenny, their silver lab Redd, two cats Oreo and Rex, and a small herd of black and red angus cattle. Izzie’s hobbies include alcohol ink painting, acrylic painting and writing poetry. She and her husband enjoy camping, traveling, and spending time with family and friends. Izzie and her husband have two grown children, Kristopher and Emily.