About Us

Our Medical Director
Marc A. Valley, MD, MS, CPE

Born in a small community outside of Sacramento California, Dr. Marc Valley received his undergraduate degree in Biochemistry from the University of California in 1980. In 1984, he received his medical degree from Loma Linda University Medical School in California. After completing his surgical internship in Los Angeles, California, Dr. Valley joined the Air Force to complete his residency in Anesthesiology and his Pain Management fellowship at Johns Hopkins Hospital in Baltimore. Since leaving the Air Force in 1996, Dr. Valley has been in private practice in Arkansas and most recently in Eastern Tennessee. Dr. Marc Valley has been the medical director at CIRCE Medical Services since 2012.

Dr. Valley is a member of the International Spinal Injection Society, the American Society of Interventional Pain Physicians, and the International Neuromodulation Society. His clinical interests include minimally invasive spinal surgery, cancer pain, and neuropathic pain. Dr. Valley and his wife Patricia have five children.


Call Our Johnson City Office at (423) 282-1171

8:30a - 5:00p M-Th
8:30a - 12:00p F
Closed Sat-Sun
Our Providers
Windy Demoura, APN

Windy Demoura joined the CIRCE Medical Services team in 2015 as a Nurse Practitioner. 

Dawn Glass, APN-BC

Dawn M. Glass, ANP-BC
Dawn earned her Bachelor of Science in nursing degree from the University of Tennessee, Knoxville. She earned her Master of Science in nursing at East Tennessee State University in 2010 and has experience in the fields of orthopedics, primary care, and cardiology. 

To schedule an appointment, please call either our Johnson City Clinic number at (423) 282-1171 and speak with an appointment coordinator. If you are a NEW PATIENT it is recommended to download and print off the PATIENT REGISTRATION Packet (found under Patient Information)and bring it with you to your first appointment. This will save you time and allow you to collect any information that may require a little time to find.

When looking for a treatment center to help you with your chronic pain, it is important to find a setting that is appropriately licensed to provide comprehensive, state-of-the-art treatment with clinicians specifically trained and experienced in treating chronic pain.

At CIRCE Medical Services, our team is trained in the latest advancements in cutting- edge chronic pain treatment.

Do you suffer from continual back pain and discomfort? Dr. Marc Valley leads a staff of qualified health professionals that will work to diagnose and treat your problem.

  • Expert Diagnosis
  • Patient Education
  • Various Treatment Options


Johnson City Office
411 Princeton Road, Suite 101
Johnson City, TN 37601
(423) 282-1171 PHONE
(423) 282-1181 FAX