This bill amends various chapters of the General Laws related to insurance, specifically focusing on diagnostic and supplemental breast examinations. It introduces new sections in Chapters 27-18, 27-19, 27-20, and 27-41, which define terms such as "cost-sharing requirements," "diagnostic breast examinations," and "supplemental breast examinations." The bill mandates that group health plans and health insurance issuers providing coverage for these examinations cannot impose any cost-sharing requirements, ensuring that individuals enrolled in such plans can access necessary breast health services without out-of-pocket expenses. The provisions outlined in the bill will take effect on January 1, 2026.