An Act to strengthen the control of contagious and infectious diseases in the Commonwealth

H 4935 requires health insurance plans and medical assistance programs in Massachusetts to cover prevention, diagnosis, and treatment of diseases designated by the commissioner as "of heightened public health importance" without cost-sharing (like copays or deductibles) or prior authorization. It applies to all health coverage under specific Massachusetts laws, including group insurance (Chapter 32A), Medicaid (Chapter 118E), and individual hospital/surgical plans (Chapters 175, 176A, 176B, 176G). The commissioner must publicly list designated diseases, review the list annually, and notify insurers and providers. An exception allows cost-sharing for tax-exempt plans that would lose their status if prohibited.