One Beacon Street
Suite 1320
Boston, MA 02108

T 617.720.5090
F 617.720.5092


One Richmond Sq.
Suite 165W
Providence, RI 02906
T 401.454.0400
F 401.454.0404

Diane Moes

Practice Area:Health Law, Corporate

Diane Bissonnette Moes joined Barrett & Singal in 2003 and is a partner in the firm's Health Law practice. As a leader in the group, she provides services for hospitals, health systems, academic medical centers, ambulatory surgery centers, physician practices, provider networks, and other not-for- profit and proprietary health care providers, payors, and vendors to the health care industry. Her experience includes counsel to health care entities regarding diversification strategies; and regulatory compliance; corporate governance and best practices; development of managed care strategies; formation of hospital/provider networks; risk management; physician recruitment; buying and selling of physician practices and other health care entities and practice management; development of assisted living facilities; advice on fraud and abuse; reimbursement; and general corporate matters.

In addition to her legal work, Diane currently serves on the Board of Directors for Community Servings, the Board of Governors of Tufts Medical Center; and is a member of the Massachusetts Women’s Forum. She served as the Mayor's Appointee to the State Boston Retirement Board and is a former member of the Boards of Trustees of University of Massachusetts, UMass Memorial Health Care, HealthAlliance Hospital, Health Law Advocates. Diane frequently presents to a range of audiences on a variety of health care and governance topics.

Awards & recognitions

Top Women in Law, Massachusetts Lawyers Weekly, 2015
Massachusetts Super Lawyers, 2004-2006*

Professional background

Of Counsel, Foley Hoag LLP, HealthCare / Government Strategies Practice
Adjunct Faculty, Suffolk Law School
Vice President of Strategic Planning and Marketing, Holy Family Hospital in Methuen
Regional Hospital Council Director, Massachusetts Hospital Association in Burlington
Government Relations Specialist, American Academy of Pediatrics in Washington, D.C.


Suffolk University Law School, J.D., 1989
University of Maryland, M.S., summa cum laude, 1976
University of Massachusetts, B.S., 1974

Court / Bar Admissions


Service areas

Behavioral health contracting; Clinical trials and research contracting; Compliance program development and counseling; Contract negotiations; Corporate governance; Medicaid fraud; Mergers & acquisitions; Fraud and abuse compliance; Graduate medical education compliance; Corporate formations; Joint ventures, affiliations and other business arrangements; Medical staff governance; Payor contracting; Payor disputes; Regulatory compliance; Patient care issues; Provider network formation; Physician compensation and financial arrangements; Physician recruitment and retention; Professional licensure and discipline; Medicare/Medicaid reimbursement; State & federal regulatory matters; Tax exempt issues; 340B Compliance


Academic Medical Centers; Allied Health Professionals; Ambulatory Care Providers; Ambulatory Surgery Centers; Biomedical & Pharmaceutical Companies; Community Health Centers; Community Hospitals; Elder Care Providers; Ground/Air Emergency Transport Providers; Hospitals; Independent & Assisted Living; Managed Care/Behavioral Health; Pediatrics Hospitals; Pharmacies; Physicians; Professional Trade Associations; Providers; Psychiatric Providers; Rehabilitation

Professional memberships

American Bar Association
Massachusetts Bar Association
Boston Bar Association, Health Law Steering Committee, former co-chair
American Health Lawyers Association


Authored: Medical Liability, 2nd Edition, Thompson West
ACOs – Mass Medical Society
NEHA Presentation: “The Buck Stops With the Board”
Mass. Biotech Council presentation “Marketing in the Age of Fraud and Abuse"
Panel discussion: "Back to the Future: Fiduciary Responsibility for Management & Trustees" - New England Institutional Investors Conference

Civic & charitable activities

Board of Directors, Community Servings
Member, Massachusetts Women’s Forum
Former trustee, University of Massachusetts, UMass Memorial Health System and HealthAlliance Hospital

  • The Super Lawyers list is issued by Thomson Reuters. A description of the selection methodology can be found at here. No aspect of this advertisement has been approved by the Supreme Judicial Court of Massachusetts.

representative matters

  • Represent single specialty ambulatory surgery center in general corporate and regulatory matters
  • Obtained a 340B designation for a hemophilia center and provide ongoing advice, including handling all contract pharmacy arrangements and other regulatory compliance
  • Served as outside counsel for a large provider network for a CMS approved COOP
  • Served as outside counsel for a large academic medical center and acquisition of a large specialty practice
  • Obtained 501(c)(6), 501(c)(3) tax exempt status approvals and provide ongoing advice to maintain tax exempt status
  • Represents physician practices in a range of matters
  • Advised ambulance transport service company on reimbursement rules and disputes



bio pdf

Diane Moes discusses the diverse backgrounds of her colleagues and the nature of client relationships


Diane Moes named one of Mass Lawyers Weekly’s “Top Wom…


Giving back to our community

“We count on them for strategic advice beyond our legal needs.”
–VP, assisted living


Clearing the path for a state-of-the-art hospital in Charlestown

“A higher level of experience and focus you don’t get from the big firms.”
–Home / hospice care provider


The ACA May Be in Jeopardy, but MACRA Isn’t Likely to G…


U.S. District Court Ruling Vacating HRSA’s 340B P…


Health Resources and Services Administration’s latest u…


Hospitals, Nursing Homes and Physicians – Get Ready f…


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