Amends TCA Title 4; Title 8; Title 10; Title 53; Title 56; Title 63; Title 68 and Title 71.

Tennessee SB0420 amends various sections of the Tennessee Code Annotated related to health insurance and cost-sharing requirements. The bill affects insurers, pharmacy benefits managers, and third-party administrators by requiring that cost-sharing amounts paid by enrollees be included in calculations for health savings accounts, and it prohibits changes to health plan coverage terms based on the availability of financial assistance for prescription drugs. Key provisions include the application of annual cost-sharing limits to all healthcare services and specific regulations regarding preventive care and prescription drug coverage.