Who to call at dor? By phone. Tax Department: DOR's call center hours for tax help are 9 a.m. - 4 p.m., Monday through Friday. (617) 887-6367 or (800) 392-6089 (toll-free in Massachusetts) Child Support Services: Case-specific child support questions should be directed to (800) 332-2733 (local callers), (617) 660-1234) from 8:30 a.m. - 4:30 p.m., Monday through Friday.What is national government services? National Government Services is a leading health care solution provider serving federal health care agencies.What is government service center? The Government Service Center is an unfinished, brutalist structure by architect Paul Rudolph. It is one of the major buildings in the Government Center complex in downtown Boston, Massachusetts, at Cambridge, Staniford, and New Chardon Streets.
Welcome to. National Government Services CEDI. The CEDI (Common Electronic Data Interchange) provides a single, electronic front end solution for all Medicare DME suppliers. CEDI works closely with software vendors, billing services, clearinghouses, and Trading Partners (submitters) for their Medicare DME electronic transactions. All DME MAC