Mass. Gen. Laws ch. 260 § 4
Actions of contract or tort for malpractice, error or mistake against attorneys, certified public accountants and public accountants, actions for assault and battery, false imprisonment, slander, libel, actions against sheriffs, deputy sheriffs, constables or assignees in insolvency for the taking or conversion of personal property, actions of tort for injuries to the person against counties, cities and towns, and actions of contract or tort for malpractice, error or mistake against hairdressers, operators and shops registered under sections eighty-seven T to eighty-seven JJ, inclusive of chapter one hundred and twelve, actions of tort for bodily injuries or for death the payment of judgments in which is required to be secured by chapter ninety and also actions of tort for bodily injuries or for death or for damage to property against officers and employees of the commonwealth, and of any county, city or town, arising out of the operation of motor or other vehicles owned by the commonwealth, including those under the control of said commission, or by any such county, city or town, suits by judgment creditors in such actions of tort under section one hundred and thirteen of chapter one hundred and seventy-five and clause (9) of section three of chapter two hundred and fourteen and suits on motor vehicle liability bonds under section thirty-four G of said chapter ninety shall be commenced only within three years next after the cause of action accrues.
Actions of contract or tort for malpractice, error or mistake against physicians, surgeons, dentists, optometrists, hospitals and sanitoria shall be commenced only within three years after the cause of action accrues, but in no event shall any such action be commenced more than seven years after occurrence of the act or omission which is the alleged cause of the injury upon which such action is based except where the action is based upon the leaving of a foreign object in the body.
For the purposes only of this section, an officer or enlisted person of the military forces of the commonwealth, as defined in chapter thirty-three, shall while performing any lawfully ordered military duty be deemed to be an officer or employee of the commonwealth.
Mass. Gen. Laws ch. 260, § 4