Hamsa Mahendranathan

PARTNER | SHE, HER, HERS

in | Office: 646 503 1246 | Direct: 646 503 1247

hamsa@whistleblower.law

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Hamsa Mahendranathan is a partner at Whistleblower Partners. Hamsa has a varied practice representing False Claims Act and SEC whistleblowers across numerous industries, including healthcare, pharmaceuticals, cybersecurity, and military defense contracting. She has also litigated whistleblower and plaintiff-side cases concerning anticompetitive conduct, particularly with respect to prescription drugs.

Hamsa started her legal career in the litigation group of Mayer Brown, where she litigated complex commercial cases and represented asylum applicants and human trafficking victims pro bono. After Mayer Brown, Hamsa worked at Constantine Cannon for nine years, where she also maintained a robust pro bono practice in addition to her whistleblowers and antitrust work. While there, she primarily represented FCA and SEC whistleblowers and antitrust plaintiffs in matters involving healthcare and pharmaceutical fraud, cybersecurity vulnerabilities, and government procurement fraud. Hamsa is currently a member of the Federal Bar Council’s Inn of Court, the New York State Bar Association’s Civil Prosecution Committee, and the President’s Council of the TAF Coalition, a non-profit organization that supports whistleblowers who expose fraud impacting government funds or financial markets.

Hamsa received her J.D. from Columbia Law School, where she was a Wien National Scholar, a Harlan Fiske Stone Moot Court Semifinalist, and a Moot Court Editor. In her second year, she interned for United States Magistrate Judge Theodore H. Katz in the Southern District of New York. She also spent the summer after her first year of law school representing defendants sentenced to death in Louisiana. Hamsa received a B.A. in Economics and International Studies from the University of Illinois in Urbana-Champaign.

“Sometimes you’re just trying to solve a problem, but everywhere you turn there’s a new roadblock. I love helping whistleblowers figure out how to move forward.”


Prior to law school, Hamsa worked on DCMA audits and employee stock options for a small government contractor.

Hamsa spends most of her free time with her spouse–a public school teacher–and their two feisty chihuahuas. She enjoys trying new foods, visiting animals at farm sanctuaries, and guessing the ending of BBC mystery shows. She is in constant competition with her many cousins for the title of Favorite Auntie to her many nieces and nephews.

  • United States ex rel. Taylor v. Kaiser Permanente, No. 3:21-cv-03894 (N.D. Cal.): Represents a whistleblower alleging that Kaiser Permanente defrauded the Medicare Advantage Program in a variety of ways, including exaggerating the sickliness of their covered population, improper coding practices, and improper practices concerning addenda.

  • Represented indirect purchasers of Namenda, Alzheimer’s drug, in a nation-wide, antitrust class action that settled for $54 million in October 2022.

  • Represented a health care coding and compliance expert who brought FCA claims alleging Medicare Advantage fraud by a large hospital network that settled for $90 million in August 2021.

  • Represented an anonymous whistleblower who received a multi-million-dollar award from the SEC in May 2021 for submitting information regarding securities law violations by a brokerage firm.

  • Represented an executive who settled his FCA claims alleging widespread failures by a home health agency to provide adequate home health care for $57 million in June 2020.

  • Represented a group of whistleblowers who brought FCA claims alleging Iran sanctions violations by a military food vendor which prompted a $45 million criminal and civil settlement in December 2019.

  • President’s Council of the The Anti-Fraud Coalition

  • Federal Bar Council’s Inn of Court

  • New York State Bar Association’s Civil Prosecution Committee

  • Volunteer Mentor through America Needs You

  • Columbia Law School (2012)

  • University of Illinois at Urbana-Champaign (2008)