Psychiatrists in Peoria, IL

Baljit Singh, M.D.

Board Certified

Dr. Baljit Singh completed his residency at the University of Louisville School of Medicine, where he received the Golden Apple Appreciation Award for outstanding teaching. He later worked as an attending psychiatrist with Methodist Medical Group and as a clinical assistant professor of psychiatry at the University of Illinois College of Medicine at Peoria.

During his academic career, Dr. Singh taught medical students and residents about general adult psychiatry. He has also served as a board member for NAMI Tri-County and was president of the Central Chapter of the Illinois Psychiatric Society from 2005 to 2007.

Dr. Singh joined Associates in Mental Health, SC, in 2015. He treats patients aged 18 and older for a wide range of mental illnesses.

Matthew M. Preston, M.D.

Board Certified

Dr. Matthew M. Preston graduated from The Ohio State University College of Medicine, where he received the Henry A. and Amelia T. Nasrallah Psychiatry Excellence Award and was elected to the Gold Humanism Honor Society, recognizing compassion, service, integrity, and clinical excellence.

He continued his training at Ohio State through his psychiatry residency and joined Associates in Mental Health, SC, in 2011. Dr. Preston works collaboratively with his patients to understand their concerns, meet their goals, and support improvements in their quality of life.

Hannah Morrissey, D.O.

Board Certified in General and Child/Adolescent Psychiatry

Dr. Hannah Morrissey joined Associates in Mental Health, SC, in August 2021. A Peoria native, she earned her bachelor’s degree from Bradley University before attending Kirksville College of Osteopathic Medicine in Missouri.

Dr. Morrissey completed her general psychiatry residency and child and adolescent psychiatry fellowship at the University of Florida, where she served as chief fellow and was active with the Florida Psychiatric Society. She also received multiple awards, including the Ralph Maurer Award for Excellence in Child and Adolescent Psychiatry for her work with patients with autism spectrum disorder.

A member of the American Academy of Child and Adolescent Psychiatry, Dr. Morrissey treats patients 18 and under for a wide range of mental illnesses, including anxiety, depression, ADHD, autism spectrum disorder, and OCD. She believes in incorporating the whole family while working with each patient.

Ghassan Bitar, M.D.

Board Certified

Dr. Ghassan Bitar completed his psychiatric residency at Rosalind Franklin University of Medicine and Science, The Chicago Medical School, where he served as chief resident from July 1997 to June 1998. He also served as co-chairman of the Resident Committee of the Illinois Psychiatric Society.

Dr. Bitar went on to complete a one-year neuropsychiatry fellowship at the University of Illinois at Chicago. His professional experience includes work with Bridgeway Mental Health Center, where he also served as medical director; the Human Service Center in Peoria; Methodist Medical Center; Andrew McFarland State Hospital in Springfield, IL; and OSF Medical Group.

Dr. Bitar joined Associates in Mental Health, SC, in May 2022. He uses his experience to treat a wide array of mental illnesses and complex cases through psychopharmacology and psychotherapy.