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Applying the right treatments in the correct dosage for each individual patient is a primary reason for our patients’ success.
Dr. Nathan Keiser DC, DACNB, FABBIR is a board certified chiropractic neurologist specializing in non-surgical, non-pharmaceutical treatment of dysautonomia, traumatic brain injury, and movement disorders. Dr. Keiser was certified as a diplomate in chiropractic neurology by the American Board of Chiropractic Neurology (ACNB) in 2010 and has since served patients from across North America and around the globe in private practice.
In addition to his clinical practice, Dr. Keiser serves as an Assistant Professor of Clinical Neurology for the Carrick Institute, which provides Post-Graduate instruction for doctors of all disciplines in the field of clinical and functional neurology. He is actively involved in ongoing research and presents regularly across North America and Europe.
Outside the clinic, Dr. Keiser is relishing life in the beautiful Great Lakes State with his family and friends. After work, you can usually find him coaching baseball, or sending routes in the climbing gym.
Earned specialty recognition in vestibular rehabilitation, childhood developmental disorders, neurochemistry, movement disorders and traumatic brain injury.
Worked under Dr. Ted Carrick, pioneer of functional neurology and renowned clinical research fellow at Harvard Medical School, as part of his Clinical Staff in Atlanta, GA.
Earned a fellowship to the American Board of Brain Injury Rehabilitation and currently serves as a board member.
Dr. Claire Keiser DC, DACNB, FABBIR is board certified chiropractic neurologist specializing in the non-surgical, non-pharmaceutical treatment of dysautonomia, traumatic brain injury, and movement disorders. Dr. Keiser was certified as a diplomate in chiropractic neurology by the American Board of Chiropractic Neurology (ACNB) in 2010 after graduating from Life University.
Since 2018, she’s taken a step back from her clinical work to stay at home with the Keiser’s 3 young children. She currently serves as the clinic’s administrative lead. Her vast clinical knowledge is an asset as the primary point of contact for patients before they come to the clinic, and as an additional resource during treatment.
Outside of ensuring the clinic runs smoothly and her duties as Keiser Mom Extraordinaire, Claire is an avid Crossfit athlete and loves to experiment in the kitchen.
Dr. Erin Kepreos DC, DACNB is aboard-certified chiropractic neurologist specializing in non-surgical, non-pharmaceutical treatments for dysautonomia, traumatic brain injury, andmovement disorders. She achieved diplomate status in chiropractic neurologyfrom the American Board of Chiropractic Neurology (ACNB) in 2023. Dr. Kepreos earned her Bachelor of Science in Kinesiology from Queen's University before obtaining her Doctorate of Chiropractic from Life University.
Originally from Toronto, Canada, Dr. Kepreos finds joy in exploring Michigan alongside her husband. Outside of theclinic, she embraces outdoor activities such as hiking, swimming, and skiing.
Dr. Alexa Tenwalde, DC, DACNB, FACFN, is a board-certified chiropractic neurologist specializing in non-surgical, non-pharmaceutical treatments for dysautonomia, traumatic brain injury, and movement disorders. She achieved diplomate status in chiropractic neurology from the American Board of Chiropractic Neurology (ACNB) and fellowship recognition from the American College of Functional Neurology (ACFN) in 2023.
Dr. Tenwalde earned her Bachelor of Science in Biomedical Sciences from Grand Valley State University before obtaining her Doctorate of Chiropractic from Life University. Her clinical interests include supporting individuals with complex neurological and autonomic presentations through individualized, functionally-integrated rehabilitation programs.
A proud Michigander, Dr. Tenwalde enjoys ice hockey, rollerblading, skate skiing, and woodworking outside the clinic.
DC, grew up in the Upper Peninsula of Michigan and graduated from the University of Michigan with a Bachelor of Science degree in Biology and Creative Writing. That summer, she interned at The Keiser Clinic and began to develop an interest in the applications of functional neurology to help treat complex neurological conditions. She then went on to obtain her Doctorate of Chiropractic from Life University and is currently preparing to take the neurology board exam.
When not studying neurology, Dr. Mattson enjoys disc golfing with her fiancé, skiing, rollerblading, and reading science fiction and fantasy books.
Kelly has been a valued member of The Keiser Clinic team since 2023. She is passionate about creating a comfortable and supportive experience for those undergoing treatment away from home.
Her compassion and empathy are deeply rooted in personal experience, having navigated years of syncope and the challenges of post-concussion recovery herself. These experiences allow her to connect with others in a genuine and understanding way.
Kelly holds a BFA from Michigan State University and is a Michigan native. As a mother of three, caregiving has always been at the heart of her life. Outside the clinic, she enjoys home renovation projects and exploring the outdoors with her family and their three-legged dog, Hugo.
We have spent over a decade walking this path with people like you. We come each day ready to listen and provide the best possible care.
We aim to empower our patients and know those that invest in their own healing usually see the best results.
Your time is valuable. We promise to be honest, real, and straight forward with you regarding your success.
Applying the right treatments in the correct dosage for each individual patient is a primary reason for our patients’ success..
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