Each Plan determines its order of benefits using the first of 211 CMR 38.05 that applies:
Personal Injury Protection, as defined by M.G.L. c. 90, § 34A, shall always be primary and pay the first $2,000 of expenses as allowed under said statute. PIP shall thereafter be secondary to any such Health Benefit Plan(s) and shall coordinate with the Health Benefit Plan(s) pursuant to M.G.L. c. 90, §§ 34A and 34M.
211 CMR, § 38.05