Raphael Katz

Raphael Katz brings a rare, two-sided command of the False Claims Act to Brown, LLC, having served both as a senior federal prosecutor enforcing the statute and as whistleblowers’ counsel pursuing it. Most recently, Mr. Katz was Civil Chief at the U.S. Attorney’s Office for the District of New Hampshire, where he had served as an Assistant U.S. Attorney in the Civil Division since 2019. In that office he also acted as Affirmative Civil Enforcement Coordinator, Healthcare Fraud Coordinator, Asset Forfeiture Coordinator, Ethics Advisor, and Professional Responsibility Officer, and was cross-designated to handle criminal prosecutions.

As a federal prosecutor, Mr. Katz led affirmative civil investigations and litigation across the full range of False Claims Act matters, healthcare, loan, grant, procurement, trade and customs, cybersecurity, and defense contract fraud, along with drug diversion and civil rights enforcement. He directed teams of agents and counsel from the FBI, CBP, SBA, DEA, HHS-OIG, and DOD-IG through every stage of a case, from data analysis and civil investigative demands to witness testimony and settlement, and secured numerous seven-figure recoveries for the government. Among his government-side results were a $6.8 million recovery for evaded customs duties on plastic resin imported from China and the seizure and sale of a yacht purchased with fraudulently obtained EIDL funds.

Before entering government service, Mr. Katz was a founding partner of a boutique litigation firm in New York concentrating on whistleblower and qui tam False Claims Act litigation and investigations. There he handled every stage of litigation — due diligence, e-discovery, pleadings, motion practice, mediation, and trial — and tried cases to successful jury verdicts or settlement, including as first chair. He obtained eight-figure False Claims Act settlements and served as primary liaison with the government on behalf of whistleblowers in False Claims Act, SEC, and IRS matters. He successfully handled a variety of cases, including Medicare fraud cases, such as those  involving genetic-testing billing and kickback claims, government-contract fraud matters, and tax fraud claims, resulting in over $100 million in recoveries for the government.

Earlier in his career, Mr. Katz litigated False Claims Act and complex commercial matters as Counsel at Diamond McCarthy LLP and as an associate at Olshan Frome Wolosky LLP, and he clerked for Justice Herman Cahn in the Commercial Division of the New York State Supreme Court.

Mr. Katz is admitted to practice in New York State and before the United States District Courts for the Southern, Eastern, and Northern Districts of New York. At Brown, LLC, he focuses on whistleblower and False Claims Act matters, healthcare fraud, government procurement and defense contractor fraud, customs fraud, and other cases involving fraud against taxpayers and public programs.