HB 2019 proposes to expand Medicaid eligibility in Texas to include individuals younger than 26 years of age, provided federal matching funds are available. The bill directs the Texas Health and Human Services Commission to implement the expansion and mandates the executive commissioner to adopt rules necessary for its enforcement. The proposed expansion applies to both initial determinations and recertifications of eligibility made on or after the implementation date, regardless of when the individual initially applied. Additionally, the bill requires the executive commissioner to take all necessary actions to notify relevant federal agencies of the expanded eligibility and to secure any necessary federal waivers or authorizations.