Michael Manthei is a partner in Holland & Knight’s Boston office where his practice is focused primarily on healthcare litigation. With more than 25 years' experience, he represents clients in healthcare fraud, abuse and compliance matters, as well as in privacy matters and in other healthcare regulatory proceedings. His clients include: companies in the supply chain for drugs and devices such as drug and device manufactures, drug wholesalers, and a wide variety of pharmacies; provider entities such as hospitals, health systems, and ancillary service providers; payer entities such as pharmacy benefits managers and health plans; and medical technology companies.

He routinely represents clients in state and federal courts and before state and federal regulatory and law enforcement authorities including the Department of Justice, United States Attorney's offices, State Attorneys General offices, Drug Enforcement Administration, and the Office of Inspector General for the Department of Health and Human Services.

In the last 10 years, Michael has served as lead counsel in over two dozen federal False Claims Act cases. He also regularly advises clients in connection with internal investigations, self-disclosures and payer audits; and advises clients on state and federal healthcare regulatory matters as they impact business operations and, in particular, sales and marketing strategies.

After law school, Mr. Manthei served as a law clerk to the Honorable C. Roger Vinson, U.S. District Judge for the Northern District of Florida. Within the firm, Mr. Manthei has served as the hiring partner in Boston, as former co-chair and now advisor of the firm's LGBTQ Affinity Group, and as a member of the firm's Diversity Council.


  • The George Washington University Law School, J.D.
  • University of Florida, B.S., Statistics
Bar Admissions/Licenses
  • Florida
  • Massachusetts
  • Pennsylvania
Court Admissions
  • All State Courts in Massachusetts
  • All Federal Courts in Massachusetts
  • All State Courts in Florida
  • All Federal Courts in Florida
  • American Bar Association
  • American Health Lawyers Association
Honors & Awards
  • Chambers USA – America's Leading Business Lawyers guide, Healthcare, 2011


Speaking Engagements