Creates provisions relating to cost-sharing under health benefit plans

HB 2279 requires Missouri health benefit plans to include costs for non-generic medications in an enrollee's out-of-pocket maximum. This means if a generic drug isn't available for a prescribed medication, the full cost paid by the enrollee (or on their behalf) counts toward their annual limit on out-of-pocket expenses. The bill also prohibits plans from adjusting cost-sharing requirements based on whether a patient qualifies for drug cost assistance programs. It applies to most health plans (excluding certain union plans) starting August 28, 2026, and affects all Missouri residents enrolled in health insurance plans covering prescription drugs.