This bill introduces a new section titled "Single site parity" across various chapters of the General Laws related to health insurance. It mandates that any health insurance contract, plan, or policy delivered or issued for delivery or renewed in the state must provide equal reimbursement to independent healthcare facilities, matching the reimbursement rates of hospital-affiliated facilities when identical healthcare services are provided. This requirement is subject to applicable federal law. The health insurance commissioner is tasked with promulgating any necessary rules and regulations for the efficient administration and enforcement of this section. The bill applies to multiple chapters, including those governing accident and sickness insurance policies, nonprofit hospital service corporations, nonprofit medical service corporations, and health maintenance organizations. It is set to take effect on January 1, 2027.