Jesse A. Witten

Jesse Witten is one of the leading health care fraud and abuse attorneys in the nation. He combines litigation skills, a keen strategic sense and deep knowledge of Medicare and other government health care programs to guide his clients through government investigations, False Claims Act (FCA) litigation, and other matters involving health care fraud and … Read more

Brian D. Roark

Brian Roark is the head of Bass, Berry & Sims’ Healthcare Fraud Task Force and concentrates his practice on representing healthcare clients in responding to governmental investigations and defending False Claims Act lawsuits. He has successfully litigated and resolved numerous healthcare fraud matters involving hospitals and health systems, ambulatory surgery centers, hospices, home health companies, … Read more

Lisa S. Rivera

A former federal prosecutor, Lisa Rivera’s practice focuses on advising healthcare providers, pharmaceutical manufacturers, medical device companies and other clients on matters related to civil and criminal healthcare fraud and abuse, as well as government investigations and enforcement. Lisa has significant experience handling matters arising under the False Claims Act, the Anti-Kickback Statute, the Stark … Read more

James L. Poth

For more than two decades, Jim Poth has assisted hospitals, health systems, laboratories, and other health care providers in implementing and executing strategies to ensure they receive appropriate reimbursement. His practice has focused on representing health care providers in litigation, arbitration, and negotiations with all types of payors. He has been the lead trial lawyer … Read more

Gregory N. Pimstone

Greg Pimstone leads the firm’s healthcare litigation practice. He is one of the country’s leading healthcare litigators, having been recognized on multiple occasions by the Daily Journal as one of the top 100 attorneys in the state of California and, most recently, as one of the state’s top 20 healthcare attorneys. Greg has been lead … Read more

Jeffrey W. Mittleman

Jeffrey W. Mittleman is a partner in the Business Section of Holland & Knight. He is also co-leader of the firm’s Healthcare & Life Sciences Industry Group and a member of the Compliance Services Team. He practices in the areas of health, regulatory and corporate law. With more than 20 years of experience, he represents … Read more

Peter R. Mathers

Always meticulously prepared and quick on his feet, Peter Mathers has relished in the privilege of helping clients understand and negotiate their way through complex and unprecedented regulatory issues for over 40 years. As Peter would say, “I believe that regulatory practice ideally involves the balancing of opportunities and risks in light of applicable legal … Read more

Jonathan L. Marks

Jonathan Marks helps clients — often large insurers — develop investigation, claims handling and litigation strategies to detect, prevent and deter fraud. As an Assistant US Attorney, Jonathan tried numerous federal jury trials and argued appeals before the US Court of Appeals. As a lawyer in private practice, Jonathan has handled hundreds of insurance fraud … Read more

Jeffrey E. Mark

Jeff Mark is a Shareholder in the Health and Business Sections. Jeff has extensive experience advising hospitals, multi-institutional health care systems, physician groups and specialty providers regarding a variety of transactional health care related matters including affiliations, joint ventures, acquisitions and divestitures; fraud and abuse; Stark; physician agreements; and equipment and office space leasing arrangements. … Read more

Elizabeth Mann

Elizabeth Mann is a partner of Mayer Brown based in the firm’s Los Angeles office. She concentrates her practice on health care transactional and litigation matters, with an ERISA focus. She leads Mayer Brown’s significant Health Care practice. For many years, Elizabeth has advised a nationwide healthcare organization that insures, delivers and administers clinical care … Read more