The Institute of Mental Health (IMH) is a 2,400-bed acute tertiary psychiatric hospital. It has wards for inpatients as well as two specialist outpatient clinics. Started by the British colonial government in 1928 as the Mental Hospital, the institute was renamed Woodbridge Hospital in 1951. In 1993, it shifted to its current Hougang/Buangkok campus and was reorganized as the Institute of Mental Health/Woodbridge Hospital (IMH/WH). Since 2007/2008, the use of the Woodbridge Hospital name has been dropped.
The IMH has seven clinical departments :- General Psychiatry, Child and Adolescent Psychiatry, Community Psychiatry, Geriatric Psychiatry, Forensic Psychiatry, Early Psychosis Intervention and Addiction Medicine. In addition, there are three specialised clinics for specific disorders - Anxiety and Mood Clinic, Sleep Disorder Clinic and Sexual Dysfunction Clinic.