
Daria’s multifaceted health care practice serves the full range of provider entities. She draws on her own in-house counsel experience to help clients attain compliant, efficient operations while navigating industry and regulatory roadblocks. Her concrete, practical guidance helps clients manage risks and compete in the face of remarkable cost pressures.
Daria's practice ranges from transactional matters to general counsel services. She has extensive experience with affiliations, mergers and acquisitions of health systems and stand-alone facilities and providers, including. hospitals, long-term care facilities, clinics, assisted living facilities, home health and hospice programs, group practices, and substance use disorder facilities. She guides clients through the regulatory aspects of capital projects and other strategic initiatives. Active in health care reform matters, Daria works with clients on clinical integration and affiliation. In addition, Daria provides experienced counsel in areas of digital health, contracting, patient care/risk management matters, privacy and security of patient information (HIPAA), and addressing adverse events, including internal investigations and crisis management.
After beginning her legal career at Mintz, she served as Vice President of Legal Services at Lahey Clinic, Burlington, Massachusetts. While at Lahey, she provided comprehensive general counsel services, advising physician leaders and management on all aspects of the Lahey delivery system, which includes a tertiary care teaching hospital, outpatient primary care and specialty clinics, and a community group practice network.
Daria serves as the Vice-Chair of Education for the Business Law and Governance Practice Group of the American Health Lawyers Association. She is frequently invited to speak on a variety of topics, including regulatory issues specific to the provider audience, corporate governance, transactional matters, internal investigations, and violence in the workplace and in health care settings.
A Mintz Pro Bono Award recipient, Daria served for eight years as director of Mintz's Domestic Violence Project, the firm's signature pro bono initiative and is active in the Pro Bono Program. Daria brings years of domestic violence advocacy to educate providers on domestic violence’s impact on the workplace and patient care. She has been a guest lecturer on this topic at Boston College School of Nursing, the Harvard School of Public Health, and Stonehill College, and at grand rounds at the Dana-Farber Cancer Institute.
viewpoints
Health Law Diagnosed – CA Proposes Regs for Pre-Closing Review of Health Care Deals: What You Need to Know
August 21, 2023 | Podcast | By Lara Compton, Deborah Daccord, Bridgette Keller, Daria Niewenhous
Mintz Health Law: What We Are Grateful For
January 11, 2023 | Podcast | By Bridgette Keller
Advance Regulatory Review of California Health Care Transactions by the New Office of Health Care Affordability to Begin in 2024
November 9, 2022 | Blog | By Lara Compton, Kathryn Edgerton, Daria Niewenhous
Health Law Diagnosed — Mintz’s 2022 Health Law New Year’s Resolutions
January 12, 2022 | Podcast | By Bridgette Keller
Massachusetts Public Health Council Approves Amendments to Clinic Licensure Regulations
May 11, 2021 | Blog | By Daria Niewenhous, Cassandra Paolillo
Massachusetts HPC Health Care Cost Trends Hearing: Key Takeaways
October 24, 2018 | Blog | By Daria Niewenhous, Caitlin Beresin, Cassandra Paolillo
Massachusetts Determination of Need Program Proposes Regulatory Revisions
September 24, 2018 | Blog | By Daria Niewenhous
Sessions Memo Resets Federal Marijuana Enforcement Policy
January 4, 2018 | Blog | By Daria Niewenhous
Massachusetts DPH Clears the Air for For-Profit Conversion of Medical Marijuana Dispensaries
October 13, 2017 | Blog | By Daria Niewenhous
Medical Marijuana in Massachusetts: Reasonable Accomodations in the Workplace
July 21, 2017 | Blog | By Daria Niewenhous
News & Press
Communication Outlets: Challenges and Opportunities
January 5, 2021
Mintz Recognized by Chambers USA 2019
April 26, 2019
Chambers USA 2018 Ranks Mintz Attorneys & Practices
May 03, 2018
Eighty-Four Mintz Attorneys Named 2016 Massachusetts Super Lawyers and Rising Stars
October 18, 2016
Events & Speaking

Health and Hospital Law: MCLE BasicsPlus
MCLE Conference Center, 10 Winter Place, via Winter Street
MCLE New England's 20th Annual Hospital and Health Law Conference 2019
Hospitals and Health Systems
Ten Winter Place, Boston
Creating Value Through Strategic Care and Operational Innovations
Massachusetts Health and Hospital Association
Boston, MA
Long Term Care and the Law
American Health Lawyers Association
Hilton New Orleans, Riverside Hotel, New Orleans, LA
Daria’s multifaceted health care practice serves the full range of provider entities. She draws on her own in-house counsel experience to help clients attain compliant, efficient operations while navigating industry and regulatory roadblocks. Her concrete, practical guidance helps clients manage risks and compete in the face of remarkable cost pressures.
Recognition & Awards
- Best Lawyers in America: Health Care Law (2013 – 2024)
- Chambers USA: Massachusetts – Healthcare (2013 – 2022); (Band 1) - Healthcare (2023)
- Massachusetts Super Lawyers: Health Care (2013 – 2022)
- Nightingale’s Healthcare News: Outstanding Hospital Lawyer (2008)
- Mintz Pro Bono Award (1997)
Daria’s multifaceted health care practice serves the full range of provider entities. She draws on her own in-house counsel experience to help clients attain compliant, efficient operations while navigating industry and regulatory roadblocks. Her concrete, practical guidance helps clients manage risks and compete in the face of remarkable cost pressures.
Involvement
- Member, American Health Law Association
- Vice-Chair of Education, AHLA Business Law and Governance Practice Group
- Member, Massachusetts Bar Association
- Member, Boston Bar Association, Health Law Section
- Member, American Bar Association
- Director, StonehamBank – A Co-operative Bank, Stoneham, Massachusetts
- Vice President and Vice Chair of the Board, Greater Boston Stage Company