Hamsa Mahendranathan

Hamsa Mahendranathan is as a partner in Constantine Cannon’s New York office. Ms. Mahendranathan predominantly represents whistleblowers under the federal False Claims Act, numerous state law equivalents, and the whistleblower programs of the Securities and Exchange Commission and Commodity Futures Trading Commission. Prior to joining Constantine Cannon, Ms. Mahendranathan practiced at Mayer Brown LLP where she focused on complex commercial litigation involving large financial institutions.

Ms. Mahendranathan received her J.D. from Columbia Law School in 2012. While there, Ms. Mahendranathan was a Wien National Scholar, a Harlan Fiske Stone Moot Court Semifinalist, and a Moot Court Editor. She remains involved in Columbia’s Foundation Moot Court Program as an alumni judge. At Columbia, Ms. Mahendranathan also interned for the Honorable Theodore H. Katz (Ret.), a United States Magistrate Judge in the Southern District of New York, and spent a summer representing indigent defendants sentenced to death in Louisiana at the Capital Appeals Project. Before law school, she graduated from the University of Illinois at Urbana-Champaign with a degree in Economics and International Studies and a minor in Italian.

Ms. Mahendranathan is admitted to practice in New York and the United States District Court for the Southern District of New York.

Notable Representations:

  • US ex rel. Supreme v. Anham— Ms. Mahendranathan represents three whistleblowers in a federal False Claims Act case alleging a military defense contractor deliberately violated sanctions by shipping vehicles and construction materials through Iran. The contractor was responsible for feeding the U.S. and NATO troops stationed in Afghanistan. The case is currently stayed in the United States District Court for the Eastern District of Virginia pending the resolution of a related proceeding brought by the Criminal Division of the Department of Justice.
  • US ex rel. Krahling v. Merck— Ms. Mahendranathan represents two virologists formerly employed at Merck who have brought a qui tam action under the federal False Claims Act alleging Merck has defrauded the government by falsifying and materially misrepresenting laboratory results to the FDA and CDC in connection with the government’s purchase of Merck’s mumps vaccine. The case is currently pending in the United States District Court for the Eastern District of Pennsylvania.
  • US ex rel. Lacey v. VNS— Ms. Mahendranathan represents a former Vice President of Visiting Nurse Service of New York, one of the nation’s largest home health care agencies, in a federal False Claims Act suit alleging the company defrauded Medicare and Medicaid by routinely failing to provide patients the care prescribed by their doctors. The case is currently pending in the United States District Court for the Southern District of New York.
  • US ex rel. Ormsby v. Sutter Health— Ms. Mahendranathan represents a medical coder and compliance specialist formerly employed at Palo Alto Medical Foundation, a medical corporation affiliated with Sutter Health, who witnessed widespread risk adjustment fraud across Sutter Health and its affiliates. The qui tam action against Sutter Health seeks to recover hundreds of thousands of dollars in Medicare Advantage overpayments. After the complaint was filed, the Government settled some of the claims relating to other Sutter Health affiliates for $30 million. The federal False Claims Act case regarding the remaining claims is pending in the United States District Court for the Northern District of California.
  • Sealed Whistleblower Matters— Ms. Mahendranathan is currently representing numerous whistleblowers in matters under the federal and states False Claims Acts and SEC whistleblower provisions of the Dodd-Frank Act involving: Alternative Trading System Violations; Data Protection and Security Failures; and Medicare/Medicaid Fraud.
  • Pro bono Asylum Representation— Ms. Mahendranathan represented an immigrant held at the ICE Detention Center in Elizabeth, New Jersey in his asylum proceedings. Her client, a gay man persecuted in his home country, was released from detention and granted asylum in the United States. See more at Immigration Justice Campaign.