Under M.G.L. c. 231 §6D, what minimum amount of reasonable and necessary medical expenses must a Massachusetts auto-accident plaintiff incur, in the absence of an enumerated injury, to sue for pain and suffering?

Why this is the answer

Massachusetts is a no-fault state under c. 90 §34A, and c. 231 §6D imposes a Tort Threshold on noneconomic-damage recovery. A plaintiff must incur more than $2,000 in reasonable and necessary medical expenses, or sustain an enumerated injury, before suing the at-fault driver for pain and suffering. Below that level the plaintiff may still recover in tort the economic losses PIP does not pay, but not pain and suffering.