Text of IL SB 3842 (2026)

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As introduced

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104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026 SB3842 Introduced 2/6/2026, by Sen. Andrew S. Chesney SYNOPSIS AS INTRODUCED: 405 ILCS 5/1-129 Amends the Mental Health and Developmental Disabilities Code. Expands the definition of "mental illness" to include transgenderism, or the condition of identifying with a gender other than the one assigned at birth. LRB104 19809 SSS 33259 b A BILL FOR SB3842LRB104 19809 SSS 33259 b 1 AN ACT concerning mental health. 2 Be it enacted by the People of the State of Illinois, 3represented in the General Assembly: 4 Section 5. The Mental Health and Developmental 5Disabilities Code is amended by changing Section 1-129 as 6follows: 7 (405 ILCS 5/1-129) 8 Sec. 1-129. Mental illness. "Mental illness" means a 9mental, or emotional disorder that substantially impairs a 10person's thought, perception of reality, emotional process, 11judgment, behavior, or ability to cope with the ordinary 12demands of life. "Mental illness" includes transgenderism, or 13the condition of identifying with a gender other than the one 14assigned at birth. "Mental illness" , but does not include a 15developmental disability, dementia or Alzheimer's disease 16absent psychosis, a substance use disorder, or an abnormality 17manifested only by repeated criminal or otherwise antisocial 18conduct. 19(Source: P.A. 100-759, eff. 1-1-19.)