Thomas O’Brien, JD

Assistant Attorney General
Health Care Division
Office of the Attorney General
Commonwealth of Massachusetts
One Ashburton Place
Boston, MA 02108
Phone: 617/727-2200
E-mail: Thomas.m.o’

Thomas O’Brien, JD, is an assistant attorney general and chief of the Health Care Division in the Office of the Attorney General of Massachusetts. In his 17 years as an assistant attorney general, Mr. O’Brien has investigated, litigated, and supervised a wide range of significant and novel health care and consumer-protection matters involving insurance companies, health plans, brokers, pharmacies, and health care providers. Attorney General Martha Coakley created the Health Care Division upon taking office in 2007 to place a heightened focus on promoting the interests of consumers as Massachusetts undertook its landmark health reform effort. Mr. O’Brien has successfully led the Health Care Division through significant policy work and litigation against numerous health plans and pharmaceutical companies, returning tens of millions of dollars to Massachusetts. During 2009, Mr. O’Brien led the Health Care Division’s groundbreaking examination of health care cost trends and cost drivers supervising multiple attorneys and experts through the investigation, development of a final report, and participation in public hearings before the Division of Health Care Finance and Policy. Mr. O’Brien also sits on the Commonwealth’s Health Care Quality and Cost Counsel on behalf of Attorney General Coakley. Prior to joining the Attorney General’s Office, Mr. O’Brien served the Secretary of the Executive Office for Administration and Finance and helped launch the Office of Purchased Services that reformed the Commonwealth’s system for purchasing health and social services from private vendors, including development and implementation of the Commonwealth’s first relational database of vendor cost report information. Mr. O’Brien received his JD degree from Suffolk University Law School, an MPA degree from the University of Massachusetts, and a BS degree in mathematics and a BA degree in English literature from the College of Santa Fe.

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