Joseph Sison, M.D.

Joseph I. Sison, M.D.


Child and Adolescent Psychiatry



  • Vol Clinical Professor


Joseph I. Sison is not currently accepting new patients. For assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).

Philosophy of Care

Dr. Sison believes in empowering his patients and their families by educating them on the nature of their disorder.  He enjoys working with patients and their family members and believes that medication treatment in conjunction with family therapy, mobilizing support systems, and working with the school community is very important in treating children and adolescents with mental illness. 

Clinical Interests

Dr. Sison has been a physician and child psychiatrist since 1993, after finishing his child psychiatrytraining at University of Maryland Medical Systems. He is a medical school graduate from UCLA School of Medicine and has been practicing medicine as a board certified psychiatrist since 1993. He is a faculty at UC Davis School of Medicine / UC Davis Health System in the department of Psychiatry & Behavioral sciences since 1994. Over the past 7 years, he has also been the medical director of the largest free-standing private psychiatric hospital in the greater Sacramento area, Heritage Oaks Hospital, a Universal Health Services, Inc. hospital. Previously, he was the medical director for 16 years for the Sacramento County Children's Mental Health. He had served in two local non-profit boards: The Head Trauma Support Project and Big Brothers Big Sisters of the Greater Sacramento.

Dr. Sison has been past-president of the Central California Psychiatric Society (a district branch of the American Psychiatric Association) and has served in the Children's Committee at the Sierra Sacramento Valley Medical Society. He is a Distinguished Fellow of the American Psychiatric Association.  His clinical interest is in treating pediatric patients with ADHD, depression, bipolar disorder, or schizophrenia and he likes working with the severely mentally ill population and their families. 


Child and Adolescent Psychiatry


M.D., UCLA School of Medicine, Los Angeles CA 1988

B.S., UC Riverside, Riverside CA 1985

Internship: UC Los Angeles, Los Angeles CA 1988-1989


Psychiatry, St. Elizabeth´┐Żs Hospital , Washington DC 1989-1991


Child Psychiatry, University of Maryland Medical Systems, Baltimore MD 1991-1993

Board Certifications

American Board of Psychiatry and Neurology, 1994

Professional Memberships

American Psychiatric Association

Central California Psychiatric Society

Sierra-Sacramento Valley Medical Society

Select Recent Publications

Sison JI, Flaherty L. the emergency assessment and response to the acutely psychotic child and adolescent Handbook of Child and Adolescent Psychiatry 1997;7:(page numbers)