The bill amends Chapter 176O of the General Laws by adding a new section, Section 31, which outlines definitions and requirements related to consumer deductibles in health insurance. Key terms such as "Insurer," "Cost sharing requirement," "Enrollee," "Health plan," "Health care service," and "Person" are defined to clarify the scope of the legislation. The bill mandates that when calculating an enrollee's contribution to cost sharing requirements, insurers must include any amounts paid by the enrollee or on their behalf. This includes ensuring that any cost sharing reductions are fully applied to the enrollee's out-of-pocket costs at the time of service.

Additionally, the bill specifies that for health savings account-qualified high-deductible health plans, the cost sharing requirements will apply after the enrollee has met the minimum deductible, except for preventive care services. It also states that expenditures for any health care service covered by the enrollee's health plan must be included when calculating contributions to the annual limitation on cost sharing. This new section will take effect for health plans that are entered into, amended, extended, or renewed on or after January 1, 2026, and allows the Commission to create necessary rules and regulations for implementation.