Provides that the Act may be referred to as the Mental Health Equity Access and Prevention Act. Amends the Department of Public Health Powers and Duties Law. Provides that subject to appropriation, the Department of Public Health shall undertake a public educational campaign to bring broad public awareness to communities across the State on the importance of mental health and wellness. Amends the Illinois Insurance Code. Provides that a group or individual policy of accident and health insurance or a managed care plan that is amended, delivered, issued, or renewed on or after January 1, 2025 shall cover all medically necessary out-of-network mental health visits, treatment, and services provided by a mental health provider or facility. Provides that a group or individual policy of accident and health insurance or managed care plan that is amended, delivered, issued, or renewed on or after January 1, 2025 shall provide coverage for 2 annual mental health prevention and wellness visits for children and for adults. Provides that a group or individual policy of accident and health insurance or managed care plan that is amended, delivered, issued, or renewed on or after January 1, 2025 shall not require the diagnosis of a mental, emotional, or nervous disorder or condition to establish medical necessity for mental health care, services, or treatment. Provides that the Department of Insurance shall contract with an independent third party with expertise in analyzing commercial insurance premiums and costs to perform an independent analysis of the impact of the coverage of services pursuant to the provisions has had on insurance premiums. Provides that the Department shall adopt any rules necessary to implement the provisions by no later than October 31, 2024. Makes other changes. Effective immediately.