Amends the State Employees Group Insurance Act of 1971, the Alcoholism and Other Drug Abuse and Dependency Act, the Children and Family Services Act, the Illinois Commission on Volunteerism and Community Service Act, the Department of Human Services Act, the Domestic Violence Shelters Act, the Illinois Youthbuild Act, the Department of Public Health Powers and Duties Law of the Civil Administrative Code of Illinois, the Interagency Coordinating Council Act, the State Finance Act, the School Code, the Specialized Care for Children Act, the Abused and Neglected Child Reporting Act, the Early Intervention Services System Act, the Interagency Board for Children who are Deaf or Hard-of-Hearing and have an Emotional or Behavioral Disorder Act, the Community Services Act, the Reduction of Racial and Ethnic Health Disparities Act, the Illinois Family Case Management Act, the Hearing Screening for Newborns Act, the Prenatal and Newborn Care Act, the Problem Pregnancy Health Services and Care Act, Developmental Disability Prevention Act, the WIC Vendor Management Act, the Renal Disease Treatment Act, the Juvenile Court Act of 1987, the Cannabis Control Act, the Narcotics Profit Forfeiture Act, the Probation and Probation Officers Act, and the Illinois Domestic Violence Act of 1986. Transfers various programs, powers, and funding to the Department of Public Health. Creates the Office of Community Health, Prevention, and Wellness within the Department of Public Health. Repeals certain provisions of the Department of Human Services Act. Repeals the Prenatal and Newborn Care Act and the Problem Pregnancy Health Services and Care Act. Provides that the bill may be referred to as the Illinois Maternal and Child Health Leadership and Excellence Act of 2012.