David G. (“Dave”) Lazarus is a white-collar defense, government investigations, healthcare enforcement, and False Claims Act trial lawyer. He represents healthcare providers, pharmaceutical companies, medical device manufacturers, laboratories, telemedicine companies, hospice agencies, home health agencies, durable medical equipment (DME) providers, executives, and other organizations in DOJ investigations, qui tam litigation, healthcare fraud matters, government enforcement actions, and complex criminal and civil proceedings.
A former Assistant U.S. Attorney in both Massachusetts and the Middle District of Florida and former Chief of the Asset Recovery Unit for the U.S. Attorney's Office in Massachusetts, Dave brings more than 20 years of experience handling high-stakes federal and state investigations, trials, and enforcement matters. He regularly advises clients facing grand jury subpoenas, Civil Investigative Demands (CIDs), search warrants, regulatory investigations, and parallel civil and criminal proceedings.
Dave is ranked by Chambers USA in Litigation: White-Collar Crime & Government Investigations and Healthcare. He is a Fellow of the Litigation Counsel of America, is recognized by Massachusetts Super Lawyers for White Collar (2026), and was named a 2026 Go To Lawyer for Life Sciences by Massachusetts Lawyers Weekly.
Key Areas of Experience
Former Federal Prosecutor and Trial Lawyer
Before entering private practice in 2021, Dave spent more than 16 years as a prosecutor and trial lawyer, including nearly a decade as an Assistant United States Attorney in Massachusetts and Florida. He served as Chief of the Asset Recovery Unit in the U.S. Attorney's Office in Boston, where he led complex healthcare fraud, white-collar, asset forfeiture, and financial litigation matters.
Today, Dave draws on that experience to represent companies, healthcare organizations, executives, physicians, and other professionals facing government scrutiny. He helps clients navigate investigations, assess risk, respond strategically to enforcement actions, and pursue favorable resolutions, whether through declinations, negotiated settlements, or trial.
Dave is also a seasoned trial lawyer both as defense attorney and, before that, a prosecutor. He has handled significant matters in federal and state courts throughout his career and approaches every engagement with trial readiness in mind. Among other notable representations, he served as one of the lead trial lawyers in the 53-day federal racketeering trial involving the founder of Insys Therapeutics, one of the nation's most prominent healthcare fraud prosecutions. He is frequently called upon to join matters shortly before trial to develop strategy, prepare key witnesses, and serve as trial counsel.
Healthcare Enforcement, False Claims Act, and Government Investigations
A substantial portion of Dave's practice focuses on healthcare and life sciences enforcement matters. He represents healthcare providers, physician groups, hospitals and health systems, pharmaceutical and biotechnology companies, medical device manufacturers, laboratories, telemedicine companies, payors, recovery treatment centers, and healthcare executives in government investigations, enforcement actions, and complex litigation.
Dave regularly advises clients in False Claims Act investigations and qui tam litigation, guiding them through seal-period investigations, Civil Investigative Demands, government subpoenas, intervention decisions, settlement negotiations, and trial. His experience includes matters arising under the federal False Claims Act as well as state false claims statutes, including those in Massachusetts, Florida, and New York.
He also counsels clients on compliance and enforcement issues involving the Anti-Kickback Statute, the Eliminating Kickbacks in Recovery Act (EKRA), reimbursement requirements, payment suspensions, and other healthcare regulatory obligations.
White-Collar Defense, Regulatory Enforcement, and Asset Recovery
Dave represents companies and individuals in a broad range of white-collar, regulatory, and enforcement matters. His experience includes SEC and CFTC investigations, Chapter 93A matters, public corruption cases, money laundering allegations, sanctions and export-control investigations, and matters involving the Foreign Corrupt Practices Act (FCPA).
Drawing on his experience as former Chief of the Asset Recovery Unit, Dave also advises clients in civil and criminal asset forfeiture proceedings, restitution disputes, and financial penalty matters. He regularly represents clients challenging government seizures and works to reduce forfeiture exposure and financial penalties, including in matters involving cryptocurrency and digital assets.
He also advises clients on COVID-19 relief program investigations involving PPP, EIDL, Main Street Lending Program, and Provider Relief Funds, as well as cybersecurity incidents, business email compromise matters, complex commercial disputes, and arbitrations. Dave serves on the Criminal Justice Act (CJA) Panel for the District of Massachusetts.
