Modifies provisions relating to prescription drug coverage

HB 3418 requires health insurance plans to notify patients at least 30 days in advance if they will remove a specific prescription drug from their coverage list (except for generic substitutions). It specifically protects patients who have been taking the same medication for over one year by preventing insurers from forcing them to switch drugs to maintain coverage. The bill applies directly to health plans and pharmacy benefit managers, ensuring patients receive clear communication about coverage changes affecting their current medications. This aims to reduce unexpected disruptions in treatment for individuals on long-term prescriptions.