405 ILCS 48/15
For the purposes of this Act:
"Mental health provider" means a clinical psychologist licensed under the Clinical Psychology Licensing Act; a school psychologist as defined in the School Code; a psychiatrist as defined in Section 1-121 of the Mental Health and Developmental Disabilities Code; a clinical social worker or social worker licensed under the Clinical Social Work and Social Work Practice Act; a marriage and family therapist or associate licensed marriage and family therapist licensed under the Marriage and Family Therapy Licensing Act; a professional counselor or clinical professional counselor licensed under the Professional Counselor and Clinical Professional Counselor Licensing and Practice Act; or any students, interns, volunteers, or other persons assisting or acting under the direction or guidance of any of these licensed professionals.
"Sexual orientation change efforts" or "conversion therapy" means any practices or treatments that seek to change an individual's sexual orientation, as defined by subsection (O-1) of Section 1-103 of the Illinois Human Rights Act, including efforts to change behaviors or gender expressions or to eliminate or reduce sexual or romantic attractions or feelings towards individuals of the same sex. "Sexual orientation change efforts" or "conversion therapy" does not include counseling or mental health services that provide acceptance, support, and understanding of a person without seeking to change sexual orientation or mental health services that facilitate a person's coping, social support, and gender identity exploration and development, including sexual orientation neutral interventions to prevent or address unlawful conduct or unsafe sexual practices, without seeking to change sexual orientation.
405 ILCS 48/15