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Michael Sand, DO

Michael Sand, DO, received his undergraduate degree in chemistry at the University of Toledo in Toledo, Ohio, in 2011. He completed medical school at Nova Southeastern University College of Osteopathic Medicine in Fort Lauderdale, Florida, in 2016.

Dr. Sand completed a fellowship in Pediatric and Adult Sleep Medicine at the University of Michigan in June of this year, after completing a residency in Family Medicine at McLaren Macomb Hospital in Mount Clemens, Michigan, in 2019. Dr. Sand is native of Yale, MI.

John Wallace, MD, FCCP

South Central Sleep Center, Diplomate, ABIM/Sleep Medicine

Dr. Wallace has served on the medical staff at South Central Regional Medical Center for over 30 years. He is board certified by the American Board of Pulmonary medicine, the American Board of Internal Medicine and the American Board of Sleep Medicine. His clinic based practice is located at South Central Sleep Medicine. He has been working in the field of Sleep Medicine for more than 17 years.

Catherine Brady,


Catherine Brady – Receptionist

Sheri Chandler, RPSGT, CRT

Clinical Coordinator

Sheri has over 15 years experience at the South Central Sleep Center. She has been a Registered Polysomnographic Technologist since 1997 and a Certified Respiratory Technician since 1993. She received her training in Sleep Medicine at the Atlanta School of Sleep Medicine and received her training in Respiratory Care at Meridian Community College.

She coordinates patient care for sleep lab studies and follow-up. If you have any sleep related questions, please contact her during regular business hours at 601-426-2886, or e-mail her at

Charles Currens, RPSGT

Team Leader

Charles has worked for the South Central Sleep Center since 2007. He is a Registered Polysomnographic Technologist and received his training in the polysomnographer program at Roane State Community College in Harriman, TN.

Angela Ducksworth, RPSGT

Angela has worked for the South Central Regional Sleep Center since 2005. She has Respiratory Therapy training.

Emily Freeman,

Sleep Lab Clerk

Emily Freeman – South Central Sleep Lab Clerk

Bambi Harris,

DME Technician

Bambi Harris – South Central Sleep Center DME Technician

Dena Moore, CRT

DMR Technologist

Dena Moore, CRT – DMR Technologist

Dena Moore has been a part of SCRMC since 2014. She handles the new setup for PAP therapy, all issues related to patient compliance, follow up and other services with durable medical equipment.

Kristi Shows,


Kristi Shows – South Central Sleep Center Lab and DME

Kristi Shows serves as the manager of South Central Sleep Center Lab and DME. She has been with SCRMC since 2018. Kristi oversees all administrative aspects for the facilities, including patient billing. If a patient has questions regarding billing, Kristi can be contacted at 601-426-2886.