The Child Support Enforcement Division of the Massachusetts Department of Revenue (DOR) has changed its medical support enforcement notice to conform to the new federal form called the National Medical Support Notice (NMSN). The Notice is a federally-mandated standardized form that all state child support enforcement agencies are required to use. It is designed to assist employers who, in the past, received many different types of documents from states to enroll children of parents paying child support in employer health insurance plans.