Geoffrey R. Kaiser
Senior Counsel
Geoffrey R. Kaiser
Senior Counsel
The brother of a physician, Jeff was always interested in health care. He takes a pragmatic approach to client representation, providing both legal analysis and practical advice in response to legal challenges regarding regulatory noncompliance and health care fraud and abuse. His background as a federal prosecutor informs his practice.
Contact
Email: [email protected]
Phone: (516) 357-3161
Fax: (516) 357-3333
926 RXR Plaza
Uniondale, NY, 11556
Practice Groups
Bar Admission
New York
Geoffrey (Jeff) R. Kaiser, who has extensive experience in enforcement matters affecting the health care industry, concentrates his legal practice on health care fraud and regulatory compliance issues, white collar criminal defense, and internal investigations. As head of the Compliance, Investigations and White Collar Practice Group, and senior counsel in the Health Services Practice Group, Jeff is frequently called upon to handle matters implicating a range of health care fraud and abuse laws, including the False Claims Act and the Anti-Kickback Statute.
Jeff also provides compliance and legal support services to self-directed care and home care providers. As a former general counsel and director of regulatory affairs & compliance for a large Medicaid fiscal intermediary and homecare provider in New York state, Jeff understands the professional support needs of industry participants as they navigate a highly regulated landscape with increasingly scarce financial resources.
Before joining Rivkin Radler, Jeff served for nearly 10 years in the Criminal Divisions of the U.S. Attorney’s Office for the Eastern District of New York and the U.S. Attorney’s Office for the Southern District of New York. While at the Justice Department, he directed many white collar investigations and prosecutions, including for health care fraud, securities fraud, mortgage fraud, mail and wire fraud, and bank fraud.
As chief of Health Care Fraud Prosecutions and deputy chief of Public Integrity in the Eastern District U.S. Attorney’s Office, Jeff directed investigations against individuals and corporations facing health care fraud allegations under a variety of criminal and civil statutes. In many instances, those investigations were rooted in allegations brought by whistleblowers under the False Claims Act. Jeff also exercised oversight responsibilities within the Public Integrity Section for all health care fraud cases within the Eastern District of New York. He received many recognitions and honors for his efforts as a federal prosecutor.
After leaving the Justice Department, Jeff served as a managing director with the former Navigant Consulting, Inc., a global expert services firm, in two of its practice groups: Disputes and Investigations and Health care Disputes, Compliance and Investigations. While at Navigant, Jeff led teams performing internal investigations and integrity monitorships of individuals and organizations in the health care, construction, and transportation industries, and supervised a major forensic review of mortgage servicing practices by a national mortgage servicer. He also oversaw the implementation of anti-counterfeiting/brand protection strategies on behalf of global brand owners.
Jeff worked as a civil litigator for more than a decade, handling commercial litigation matters involving an assortment of business disputes. He developed particular experience in the investigation and prosecution of complex civil frauds under multiple common law and statutory grounds, including the federal Racketeer Influenced and Corrupt Organizations (RICO) Act.
In law school, Jeff served on the Moot Court Board. After graduating from law school, he served for two years as law clerk to the Hon. Fritz W. Alexander II, a former associate judge on New York state’s highest court, the New York Court of Appeals.
He is a frequent writer and speaker on a range of legal topics, particularly in the areas of health care fraud and compliance.
Since 2014, Jeff also has been an adjunct professor at St. John’s University School of Law, where he has taught health care fraud.
Court Admissions
U.S. District Courts for the Southern and Eastern Districts of New York
U.S. Court of Appeals for the Second Circuit
Education
New York University School of Law, J.D.
University of Virginia, with honors, Phi Beta Kappa, B.A.
News & Publications
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Home Health Care Continued to Be a Federal Enforcement Target in 2025
November 18 | 2025 -
54 Rivkin Radler Attorneys Named 2025 New York Metro Super Lawyers®/Rising Stars
October 30 | 2025 -
The Intersection Between OMIG’s Home Care Audit Protocols and Liability Risk Under The False Claims Act
October 9 | 2025
View All Publications
Webinars
- A Survey of OIG's 2022 Advisory Opinions: What They Could Mean for Your Organization
January 28 | 2023 - Prohibitions on Provider Inducements
February 27 | 2024
Jeff was named to New York Metro Super Lawyers in the Metro New York area from 2012 to 2025.
Best Lawyers in America® recognized Jeff for Health Care Law and Litigation-Health Care for the year 2026.
Since 2021, the prestigious Chambers USA has named Jeff a “Ranked Lawyer” in Band 5. Since 2016, the Health Services Practice Group has been recognized in the Chambers USA directory.
