Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 176I, § 7

(a) the number of covered persons under health benefit plans and workers' compensation insurance or self-insured workers' compensation plans, which include preferred provider arrangements;

(b) financial and utilization date of health benefit plans and workers' compensation insurance or self-insured workers' compensation plans, which include preferred provider arrangements;

(c) a list of preferred providers; and

(d) such other information as the commissioner may reasonably require.