Mass. Gen. Laws ch. 176O, § 28
(i) be in a searchable format; and (ii) make accessible to the general public the current health care providers for a network plan through a clearly identifiable link or tab without requiring the general public to create or access an account, enter a policy or contract number, provide other identifying information or demonstrate coverage or an interest in obtaining coverage with the network plan. Each electronic network plan provider directory shall be updated not less than monthly; provided, however, that an electronic network plan provider directory shall be updated more frequently than monthly if required by state or federal law or regulations promulgated by the commissioner, when informed of and upon confirmation by the plan of: