Since 1973, Chestnut Health Systems has been providing behavioral health care in Illinois. Chestnut has approximately 600 committed, compassionate employees providing care out of multiple chemical dependency and mental health treatment centers in Central and Southern Illinois. We have been continuously Accredited by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO) since 1975.

For your convenience our Web site is broken down into three broad sections: About Chestnut, Services and Search.

Chestnut Health Systems offers a wide array of services including:

• Chemical dependency treatment for adults and adolescents
• Counseling and mental health services
• Services for the chronic mentally ill
• Chestnut Global Partners (CGP): workplace services for both domestic and international workforces
• Credit Counseling
• Problem Gambling Services
• Prevention programming
• an extensive research, training and publications component called Lighthouse Institute.

Special Programs and Projects

• the Global Appraisal of Individual Needs (GAIN)
• the Adolescent Community Reinforcement Approach and Assertive Continuing Care (A-CRA/ACC)
• the Assessment Building System (ABS)
• Adolescent Programs Support Site (APSS)
• GAIN Programs Support Site (GPSS)
• Lighthouse Institute's Bookstore