Our Locations

Certified Sleep Centers

Tranquility Sleep Specialists, PLC operates out of sleep centers certified by the American Academy of Sleep Medicine at the following locations.

Tennova Sleep Center North

North Knoxville Medical Center
7557 Dannaher Way Suite 240, Powell, TN 37849
865-859-7800 / fax 865-859-7809

Tennova Sleep Center West

Turkey Creek Medical Center
10800 Parkside Drive, Suite 202, Knoxville, TN 37934
865-218-7463 / fax 865-218-7275

AASM Accredited Facility Member H rgb

Administrative Office

(No patients seen here)
3232 Tazewell Pike, Knoxville TN 37918

Physician Referrals

Tranquility Sleep Specialists can provide your patients with expert care for all their sleep problems. Dr. Dewey McWhirter is board certified in Sleep Medicine. He sees patients as young as three years.

Our Contacts


7557 Dannaher Way Suite 240
Powell, TN 37849


10800 Parkside Drive, Suite 202
Knoxville, TN 37934

Open Hours

Monday - 8:30AM - 4:30PM
Tuesday - 8:30AM - 4:30PM
Wednesday - 8:30AM - 4:30PM
Thursday - 8:30AM - 4:30PM
Friday - 8:30AM - 4:30PM
Saturday - Closed
Sunday - Closed

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Welcome to Tranquility Sleep Specialists

Now Offering:


7557 Dannaher Way Suite 240
Powell, TN 37849


10800 Parkside Drive, Suite 202
Knoxville, TN 37934

Dewey McWhirter, MD

Sleep Medicine has been Dr. McWhirter's passion for decades. He became interested in sleep medicine while dealing with his own sleep problems in high school and college. He earned degrees in English, Biochemistry, and Chemistry from Bowdoin College and the College of Charleston. He focused on sleep medicine in medical school at the Medical University of South Carolina and during his residency in Neurology at Emory University. During a Sleep Medicine fellowship at the Cleveland Clinic, he trained under some of the world's leading experts in the field of sleep medicine. Dr. McWhirter is board certified in Sleep Medicine. He has been treating patients with sleep disorders in east Tennessee since 2007. He is interested in all areas of sleep medicine but he has a special interest in narcolepsy and delayed sleep phase syndrome. Dr. Dewey McWhirter is board certified in neurology & sleep medicine by the American Board of Psychology and Neurology.

Melissa McFerran, FNP-C

Melissa McFerran received her Bachelor's Degree in Nursing from the East Tennessee State University in 2011 and then continued her education at the University by completing her Masters of Science in Nursing in 2015. Melissa has experience in many aspects of patient care. Prior to becoming a nurse practitioner, Melissa worked as a nurse in both orthopedics and labor and delivery. Her hands-on experience and education have molded her into a compassionate and professional patient care provider. She takes pride in the treatment she provides to patients with sleep problems.

Caleigh Simon, NP

Caleigh graduated from nursing school in 2012 with a passion for helping others. She was very motivated to continue her education and graduated as a Nurse Practitioner from Lincoln Memorial University in 2014. While in school, she worked as a Nurse at Tennova in Gastrointestinal disease, Primary Care, and Pulmonary. After graduating and becoming a certified nurse practitioner, she worked in a gastrointestinal office along with an acute/walk-in Clinic. Caleigh is excited to be a part of Tranquility Sleep Specialists to help the community to improve their quality of life and help people sleep well.

Michelle's Bio here