David A. Koenigsberg

I specialize in representing whistleblowers in False Claims Act qui tam law suits. I have over 25 years experience in litigating False Claims Act cases, first as an Assistant United States Attorney for the Southern District of New York and then representing private whistleblowers. Overall, these cases have recovered over $800 million for the federal and state governments. I have handled cases in the areas of health care, defense contracts, higher education, medical research grants and contracts, and government contracts.

Fordham University School of Law

J.D. (1982)

1979 - 1982

Activities: Fordham Urban Law Journal, Comment Editor

Williams College

B.A. (1978) | Economics

1978

Honors: Cum Laude

Partner

Menz Bonner Komar & Koenigsberg LLP

Current

Assistant United States Attorney

United States Attorney, Southern District of New York

1990 - 1999

Law Clerk, Peter K. Leisure, U.S.D.J.

United States District Court, Southern District of New York

1984 - 1986

Inability to Identify Invoices Does Not Mandate Dismissal of FCA Complaints

New York Law Journal

August 15, 2017

Key Legal Areas for Corporate Compliance Programs: Health Care Compliance Plans, in T. Banks & F. Banks, Corporate Legal Compliance Handbook, Second Edition, Chapter 9

Wolters Kluwer

2016

A Compliance Plan Can Save Your Business!

Westchester Physician

October, 2002

Relator’s Share Under the False Claims Act

New York Law Journal

1999

The Standard of Proof in At-Large Vote Dilution Discrimination Cases After City of Mobile v. Bolden

Fordham Urban Law Journal

1981

Convincing DOJ Not to Intervene, A National Institute on the Civil False Claims Act and Qui Tam Enforcement, Washington, D.C.

November 19, 1998

American Bar Association

How to Reduce a Physician’s Risk of Investigation by Regulatory and Prosecutorial Agencies: Real Life Physician Qui Tam and Investigation Cases, Joint Meeting: Health Law Section, N.Y. State Bar Association & Medical Society of the State of New York, Queens, New York

October 11, 2000

New York State Bar Association

Health Care False Claims Act Cases: Is it a Federal Case? Is it a State Case? Is It All of the Above in Many Permutations, All at Various Stages of Development?, False Claims Act Litigation 2010, New York, New York

November 10, 2010

Practicing Law Institute

Successful ‘Qui Tam’ Partnerships with the N.Y. Attorney General's Office, Fighting Fraud Against the Government in the Empire State, Attorney General's Conference on the Strengthened New York False Claims Act, Qui Tam Actions & Enhanced Enforcement Efforts, New York University School of Law, New York, New York

June 8, 2011

New York State Office of the Attorney General

Litigating New York State False Claims Act Cases: Perspectives of a Whistleblower Counsel, New York, New York

November 19, 2012

New York State Bar Association

Attorney General's Award for Distinguished Service

United States Department of Justice

1997

Inspector General's Award for Exceptional Achievement

United States Department of Health & Human Services

1997

Inspector General's Integrity Award

United States Department of Health & Human Services

1997

Director's Award for Superior Performance as an Assistant United States Attorney

Executive Office for United States Attorneys

1996

New York State Bar Association

Member

Current

Westchester County Bar Association

Member

Current

New York State Bar  # 1864487

Member

1983 - Current

Association of the Bar of the City of New York

Member

1983 - Current

New York

Since 1983

2nd Circuit

Since 1989

U.S. Supreme Court

Since 1993

United States District Court, Eastern District of New York

Since 1983

United States District Court, Northern District of New York

Since 2004

United States District Court, Southern District of New York

Since 1983

• Qui Tam
• False Claims Act
• Whistleblower
• Tax Whistleblower Law
• SEC Whistleblower Law