Atty. Lucas Issacharoff
Lucas Issacharoff is Of Counsel in Lieff Cabraser’s New York office. Prior to joining Lieff Cabraser, Lucas was an Assistant U.S.
Profile Summary
About Lucas Issacharoff at a glance
Lucas Issacharoff is an Of Counsel based in New York, New York, practicing at Lieff, Cabraser, Heimann & Bernstein, LLP. They have 11+ years of legal experience, licensed to practice since 2015. Admitted to practice in New York (2015), U.S. District Court, Southern District of New York (2016), U.S. District Court, Eastern District of Michigan (2017), and U.S. District Court, Eastern District of New York (2017). Educated at Harvard Law School, Cambridge, MA (J.D., 2014) and London School of Economics and Political Science, London, UK (M.Sc. Development, 2011). Serands clients in New York, NY and the surrounding metropolitan area.
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About
- Lucas Issacharoff is Of Counsel in Lieff Cabraser’s New York office
- Prior to joining Lieff Cabraser, Lucas was an Assistant U.S
- Attorney in the Southern District of New York within the Civil Frauds Unit
- As an AUSA, he investigated numerous False Claims Act cases
- His cases include one of the largest ever FCA jury verdicts
- Following a four-week trial, a jury found Omnicare, Inc. and CVS Health Corporation liable for improperly submitting prescription drug claims to federal healthcare programs, ultimately resulting in a total award of $949 million to the government
- He also investigated Gilead Life Sciences’ physician speaker program, which resulted in a $202 million settlement for violations of the Anti-Kickback Statute and the False Claims Act
- In addition to his work on FCA cases, Lucas handled civil rights cases, challenges to government programs, tax and bankruptcy claims, and tort claims
- He briefed and argued five appeals, including multiple constitutional and statutory challenges to federal firearms laws and Administrative Procedure Act challenges to federal environmental regulations
- He also conducted a civil rights investigation that led to a findings letter against the Mount Vernon Police Department for a pattern or practice of civil rights violations
- Prior to serving as an AUSA, Lucas was an associate at a leading litigation boutique, where he worked on a diverse range of cases including class actions and antitrust, employment, trademark, and commercial disputes
- Lucas is a 2014 cum laude graduate of Harvard Law School, a 2011 graduate with distinction of the London School of Economics and Political Science, and a 2010 magna cum laude graduate of Princeton University
- Following law school he clerked for the Hon. Katherine Polk Failla on the Southern District of New York and the Hon. Reena Raggi on the Second Circuit Court of Appeals
- In the News •May 27, 2026 Lieff Cabraser Attorneys to Speak at ABA Qui Tam & Civil False Claims and Healthcare Fraud Institute 2026 •May 13, 2026 DOJ Civil Division Launches New FOCUS Initiative to Support Data Mining False Claims Act Cases •November 20, 2025 Lucas Issacharoff Speaks on Medicare Part D False Claims Act Litigation at the 25th Annual TAF Coalition Conference Publications & Presentations •Panelist, “False Claims Act Trial Practice,” ABA Qui Tam & Civil False Claims and Healthcare Fraud Institute, May 2026 •Panelist, “Medicare Part D False Claims Act Litigation: Key Developments and Trial Strategies,” 25th Annual TAF Coalition Conference, November 2025
Jurisdictional Context
Why local counsel matters in New York
Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in New York are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in New York courts without local counsel or pro hac vice admission.
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