Hawaii Revised Statutes Division 1. Government § 87A-23

(1) There shall be no duplication of benefits payable under medicare. The plan under this section, which shall be secondary to medicare, when combined with medicare and any other plan to which the health benefits plan is subordinate under the National Association of Insurance Commissioners' coordination of benefit rules, shall provide benefits that approximate those provided to a similarly situated beneficiary not eligible for medicare;

(2) The State, through the department of budget and finance, and the counties, through their respective departments of finance, shall pay to the fund a contribution equal to an amount not less than the medicare part B premium, excluding medicare income-related monthly adjustment amounts for a retired employee hired after June 30, 2023, and their spouse, for each of the following who are enrolled in the medicare part B medical insurance plan: (A) an employee-beneficiary who is a retired employee, (B) a spouse of an employee-beneficiary hired prior to July 1, 2023, while the employee-beneficiary is living, and (C) an employee-beneficiary's spouse, after the death of the employee-beneficiary, if the spouse qualifies as an employee-beneficiary. If the amount reimbursed by the fund under this section is less than the actual cost of the medicare part B medical insurance plan, excluding medicare income-related monthly adjustment amounts for a retired employee hired after June 30, 2023, and their spouse, due to an increase in the medicare part B medical insurance plan rate, the fund shall reimburse each employee-beneficiary and spouse of an employee-beneficiary hired prior to July 1, 2023, for the cost increase within thirty days of the rate change. Each employee-beneficiary and employee-beneficiary's spouse who becomes entitled to reimbursement from the fund for medicare part B premiums after July 1, 2006, shall designate a financial institution account into which the fund shall be authorized to deposit reimbursements. This method of payment may be waived by the fund if another method is determined to be more appropriate. For purposes of this section, a “retired employee” means retired members of the employees' retirement system; county pension system; or a police, firefighters, or bandsmen pension system of the State or a county as set forth in chapter 88;

(3) The benefits available under this plan, when combined with benefits available under medicare or any other coverage or plan to which this plan is subordinate under the National Association of Insurance Commissioners' coordination of benefit rules, shall approximate the benefits that would be provided to a similarly situated employee-beneficiary not eligible for medicare;

(4) All employee-beneficiaries or dependent-beneficiaries who are eligible to enroll in the medicare part B medical insurance plan shall enroll in that plan as a condition of receiving contributions and participating in benefits plans under this chapter. This paragraph shall apply to retired employees, their spouses, and the surviving spouses of deceased retirees and employees killed in the performance of duty; and

(5) The board shall determine which of the employee-beneficiaries and dependent-beneficiaries, who are not enrolled in the medicare part B medical insurance plan, may participate in the plans offered by the fund.