Kristyn DeFilipp

Co-Chair, Litigation Department

I enjoy crafting creative solutions to my health care clients’ business challenges, whether litigating a matter or negotiating a resolution.

Kristyn DeFilipp is a healthcare litigator whose practice includes impact litigation, complex commercial litigation, and high stakes employment investigations and disputes. She represents clients throughout the healthcare industry: payers, hospitals, pharmaceutical and diagnostics companies, health IT companies, and other healthcare adjacent businesses. She combines her wide-ranging litigation and trial experience, her industry expertise and her pragmatic instinct to develop strategies for her clients to tackle problems in and out of court.

Kristyn’s experience includes matters before state and federal trial courts, federal appellate courts, administrative agencies and arbitrators. She focuses on strategic and high value solutions for business disputes, and enjoys working closely with clients to determine the best course of action to achieve their goals. She has significant trial experience, having tried on more than a dozen cases in her thirteen years of practice.

Kristyn plays an active role in internal firm matters. She currently co-chairs the Litigation Department, a is a former co-chair of the firm’s Women’s Forum, and a former member of the firm’s Hiring Committee and Working Group on Associate Development and Retention. She is also active in the firm’s pro bono program. Kristyn previously served as a Special Assistant District Attorney for Norfolk County, where she represented the Commonwealth of Massachusetts in all stages of criminal prosecutions, including bench and jury trials.


  • Harvard Law School, J.D., 2009
  • Boston College, B.A. in Theatre Arts and English, summa cum laude, 2004

Bar and Court Admissions

  • Massachusetts


  • Represents national trade association for pharmacy benefit managers in federal impact litigation, successfully invalidated multiple state laws on ERISA and Part D preemption grounds.
  • Representing medical school in dispute with teaching hospital.
  • Representing dental services organization in enforcement action alleging violation of state consumer protection laws
  • Represented healthcare provider in reimbursement appeal arising out of Medicare related-party principles.  Provider prevailed after administrative hearing.
  • Represented national trade association for behavioral health providers in amicus brief to First Circuit on False Claims Act liability.
  • Representing startup “green wall” business in patent license and fiduciary dispute with former shareholder and his new venture.
  • Represented closely-held corporation and majority shareholder in suit between shareholders and company alleging “freeze-out” and breaches of fiduciary duty.  Obtained jury verdict against minority shareholder for breach of fiduciary duty relating to FDA compliance.
  • Represented global medical diagnostics company in thirteen-day arbitration over dispute with key vendor concerning exclusivity and FDA quality and compliance issues.  Kristyn examined twelve witnesses, including four expert witnesses, in this contentious and high-stakes contract dispute.
  • Represented closely-held corporation in suit between stockholders and counterclaim by company against 50% stockholder.  Obtained favorable high six-figure jury verdict against 50% stockholder for his breach of fiduciary duty to the company arising out of stockholder’s communications with labor union.
  • Represented multinational software consulting company in ICDR arbitration regarding dispute over implementation of CRM software at telecommunications utility, resulting in multi-million dollar award for client.
  • Represented medical device manufacturer in patent infringement suit involving methods of automating nucleic acid diagnostic assays and related consumable products, resulting in favorable settlement.
  • Won full defense verdict after federal jury trial on behalf of hospital client, securing dismissal of all claims in a multi-count complaint alleging race discrimination.  Kristyn served as second chair litigator on this trial team and handled examinations of the individual defendant, damages expert witness, and the plaintiff’s key fact witness.
  • Won administrative trial on behalf of retail coffee client, dismissing all age discrimination and retaliation claims (37 MDLR 154).
  • Successfully defended national retail chain in charge of disability discrimination and retaliation, resulting in lack of probable cause finding by state agency and dismissal of federal lawsuit.
  • Successfully defended an employer in a race discrimination case by achieving dismissal at beginning stages of the case at the Massachusetts Commission Against Discrimination. 
  • Successfully represented an employer in a dispute concerning a card-check procedure set forth in a union neutrality agreement.
  • Advising multiple clients on reproductive rights laws in wake of Dobbs v. Jackson Women’s Health Organization.
  • Co-authored amicus briefs on behalf of MassTLC in federal court cases related to “travel ban” executive orders.
  • Represented plaintiffs in federal Fair Housing Act case against major East Coast based multi-state rental company, achieving favorable settlement, which is one of the first of its kind to hold a landlord responsible for remedying tenant-on-tenant racial harassment.
  • On behalf of a victim of domestic violence, obtained reversal of denial of a 209A restraining order in the Massachusetts Appeals Court.
  • Obtained remand of agency decision in veteran’s claim for service-connection.

Honors & Involvement

  • The Best Lawyers in America (2023)
  • Civil Rights Pro Bono Award, Lawyers’ Committee for Civil Rights and Economic Justice (LCCR), 2015
  • Harvard Law School Ames Moot Court Competition Semi-Finalist, 2008
  • Massachusetts Bar Association, Member
  • Boston Bar Association, Member
  • Citizens Schools, 8th Grade Academy Writing Coach

Speaking Engagements