About Us

Sleep Wellness Center helps people of all ages overcome sleep disorders.

Sleep Wellness Center is an independent, privately-owned sleep center that was established in 1994 as Winmar Diagnostics, Inc. We have pioneered and set the standard for sleep diagnostic services in this region.

All of our sleep study technicians are registered or certified sleep specialists who work one-on-one with you from diagnosing sleep disorders, such as excessive snoring, sleep apnea, insomnia, and narcolepsy to finding innovative therapies and solutions that fit your lifestyle. Our goal is help you overcome sleep issues to get a peaceful night’s rest so you can lead a happier, healthier life.

We carry a full range of CPAP equipment and supplies in our clinics and offer free inspections of your machines to ensure that your therapy is safe and effective.

Portable Sleep Labs for Small Communities

Our clinics are located in Fargo and Grand Forks, ND; however our organization was one of the first companies in the nation to offer portable sleep labs. Sleep Wellness Center brings the latest sleep technology and diagnostics to several community hospitals and clinics across the country. Our model is built around keeping you in your hometown facilities and under the care of your own physician.

For more information about our outreach program or to find out when we’ll be in your community, contact Marcia Nelson at (701) 235-7424 or marcia.nelson(at)winmarsleep(dot)com.

Quarterly Newsletter

View our quarterly newsletter (PDF, 2.47 MB).

Meet Our Medical Director

Dr. Susan Mathison

Dr. Susan Mathison
Medical Director, Board-certified Sleep Specialist

Dr. Susan Mathison is our board-certified sleep specialist. She is an independent physician who specializes in sleep disorders, otolaryngology (ear, nose and throat), head/neck surgery, and facial plastic surgery. She earned her undergraduate degree from Stanford University, Stanford, CA and her medical degree from the University of Texas-Southwestern Medical School in Dallas, TX. After completing seven years of specialty training in Seattle at the University of Washington, she returned home to Fargo in 1997 where she oversees Sleep Wellness Center and started Catalyst Medical Center.