Attorneys Jason D. Gregoire

Print this page

attorney photo for print
shareholder | Portsmouth, NH

Jason serves as chair of the firm’s Healthcare Practice Group. He advises practitioners and facilities of all types on regulatory, privacy, corporate, contracting, licensing, risk management, fraud and abuse, and patient care issues. Jason routinely works with hospitals, long-term care facilities, home health and hospice agencies, federally qualified health centers (FQHCs), continuing care retirement communities (CCRCs), substance use disorder treatment facilities, and professional practices.

He assists physicians, dentists, optometrists, veterinarians, chiropractors, and other health care practitioners in employment and professional practice transitions including negotiating employment contracts, shareholder buy-ins, and practice sales and acquisitions. He has represented physician practices in sales to hospital systems and dental practices in sales to Dental Service Organizations (DSOs).

Jason also helps physicians, nurses, and others to protect their professional licenses before licensure boards such as the Board of Medicine and Board of Nursing.

Jason frequently speaks to industry groups such as the NH Health Care Association, Home Care, Hospice & Palliative Care Alliance of NH, Medical Group Management Association, Healthcare Financial Management Association, NH Providers Association, Bi-State Primary Care Association, and Maine Primary Care Association.

What Clients are Saying

“Attorney Jason Gregoire represented me in the sale of my dental practice to my associate. From our first Zoom meeting on a Sunday night, Jason was always available to answer my phone calls and/or reply to my emails in a timely manner. His ability to draft, review and edit contracts and other legal documents made the process go smoothly. I found him to be an efficient and effective advocate for me when it came to negotiating contract details with the buyer’s counsel. Without any hesitation, whatsoever, I can recommend Jason to anyone wishing to buy or sell a dental practice.” ~ Frederic S. Mackler, DMD, MA, West Springfield, MA

“I hired Jason to help me with a dental practice transition and it was not a very typical case. Jason was the best guide throughout the process of purchasing my practice and he was such a wonderful support when times were rough. I couldn’t have done it without his guidance and encouragement. I sincerely thank him from the bottom of my heart for all the help. It was an awesome experience working with him and his team. I am so relieved that I have found Jason to be on my support team in business!” ~ Harbpinder Shevchenko, DMD, Owner, Smiles of Salem

“Jason Gregoire recently assisted me with the sale of my orthodontic practice and office real estate. Jason and his team were exceptionally attentive, professional and knowledgeable during the transaction. The entire process was seamless and smooth and I was always kept updated and informed. I highly recommend Jason Gregoire without reservation.” ~ James N. Roy, DMD, Bedford, NH

Disclaimer: Testimonials found on this website describe the experiences of Sheehan Phinney clients. We appreciate our clients and their willingness to share their experiences. Please keep in mind that the success of any legal matter depends on the unique circumstances of each case: we cannot guarantee particular results for future clients based on successes we have achieved in past legal matters.


Key Cases

  • Represented New Hampshire hospital in affiliation transaction with large, Boston-based health system.
  • Represented New Hampshire home health agency in affiliation transaction with hospital system.
  • Represented physiatry practice in asset sale to hospital system.
  • Represents dental and oral surgery practices in sales to, and management services relationships with, Dental Service Organizations (DSOs).
  • Represents sellers and buyers of dental, physician, and optometry practices in merger and acquisition transactions.
  • Served as local counsel to national optometry services provider in establishing management services relationships with New Hampshire practices.
  • Prevailed at the New Hampshire Supreme Court on behalf of a hospital challenging an ambiguity contained in its umbrella insurance policy. Exeter Hospital, Inc. v. Steadfast Insurance Company, 170 N.H. 170 (2017).
  • Represents professionals before the Board of Medicine, Board of Nursing, Allied Health Board, Naturopathic Board of Examiners, and Board of Nursing Home Administrators.
  • Represented two large New Hampshire hospitals in constitutional litigation challenging the New Hampshire Medicaid Enhancement Tax resulting in a ruling that the enabling statute was unconstitutional and leading to a landmark settlement with the State of New Hampshire.
  • Obtained summary judgment, affirmed on appeal by the New Hampshire Supreme Court, for a physician practice who was sued by a former shareholder seeking to recoup an insurance refund received under the Tuttle v. NHMMJUA settlement.
  • Obtains guardianships over incapacitated adults for hospitals and long-term care facilities.
  • Advises clients on developing, implementing and maintaining HIPAA and Part 2 policies and procedures.


  • State of New Hampshire
  • Commonwealth of Massachusetts
  • State of Maine

Civic Involvement

  • Board Member, Cross Roads House
  • President, Board of Directors, NH Providers Association
  • Board Member, NH Long-Term Care Foundation
  • Member, Compliance Committee, Easterseals NH, VT & ME
  • Member, Education Committee, New Hampshire Health Care Association
  • Leadership New Hampshire Graduate (2020)
  • Hoffman-Hass Fellow (2017)
  • Leadership Seacoast Graduate (2014)
  • Past Chair, Town of Exeter Conservation Commission
  • Past Chair, New Hampshire Bar Association Health Law Section
  • Past Member/Officer, New Horizons for New Hampshire


  • NH Union Leader's 40 Under Forty Award
  • Best Lawyers in America® 2023 'Lawyer of the Year', Healthcare
  • Best Lawyers in America®, Health Care
  • Chambers USA, Healthcare
  • New England Super Lawyer®, Health Care
  • Rising Star by New England Super Lawyers®, Healthcare (2013-2022)
  • NH Health Care Association Star Award - 2016
  • Head Notes Editor, Vermont Law Review
  • Member, Vermont Law School Moot Court Advisory Board