LEWISTON — Thaddeus Shattuck, MD, has joined St. Mary’s Health System.

Dr. Shattuck is a sleep specialist and psychiatrist who will be sharing his expertise with patients at St. Mary’s Center for Sleep Disorders.

Dr. Shattuck has a particular interest in circadian rhythm disorders and has been active in the treatment of sleep disorders in adolescent, geriatric, peri-menopausal, and bariatric patients.

Dr. Shattuck earned his medical degree from Dartmouth Medical School in Hanover, N.H. He completed his psychiatric residency at Brown University in Providence, R.I., and a Beth Israel Deaconess Medical Center Sleep Medicine Fellowship in Boston.

For more information, call 777-8959 or visit www.stmarysmaine.com.