Amends the Illinois Insurance Code. Provides that an insurer that amends, delivers, issues, or renews group accident and health policies providing coverage for hospital or medical treatment or services for illness entered into on or after January 1, 2022 shall ensure that the insured have timely and proximate access to treatment for mental, emotional, nervous, or substance use disorders or conditions. Provides that network adequacy standards for timely and proximate access to treatment for mental, emotional, nervous, or substance use disorders or conditions must satisfy specified minimum requirements. Provides that if there is no in-network facility or provider available for an insured to receive timely and proximate access to treatment for mental, emotional, nervous, or substance use disorders or conditions in accordance with the minimum network adequacy standards, the insurer shall provide necessary exceptions to its network to ensure admission and treatment with a provider or at a treatment facility in accordance with those network adequacy standards. Effective immediately.