Geoffrey M. Sigler is a partner in Gibson, Dunn & Crutcher’s Washington, D.C. office. He practices in the firm’s Litigation Department, and he is a member of the Firm’s Class Action, Health Care, and Insurance Practice Groups. Throughout Mr. Sigler’s career, he has successfully represented corporate clients in dozens of class actions and other complex cases in federal and state courts throughout the United States.
In recognition of Mr. Sigler’s repeated “successes in high-stakes litigation,” he has been named by Law360 as an MVP – one of five “elite” attorneys for the health care industry. Mr. Sigler also has been recognized by Law360 as a “Rising Star,” based on his “string of high-profile wins” for the insurance industry. Mr. Sigler frequently litigates cases and advises clients on cutting-edge issues arising under ERISA, the Affordable Care Act, the Medicare Act, the False Claims Act, and other laws and regulations.
Representative matters include:
- In re Aetna UCR Litigation, MDL 2020 (D.N.J.), a consolidated multi-district litigation in which putative nationwide classes of providers and subscribers alleged that various managed care companies conspired to underpay plan benefits for out-of-network services. Mr. Sigler helped his client obtain dismissal of RICO and antitrust claims and denial of class certification for the remaining claims under ERISA.
- Brink v. XE Holding, LLC (D.D.C.), a nationwide class action brought by employees of government contractors under RICO and various other legal theories, seeking $2 billion in damages from insurers and government contractors for the alleged mishandling of workers’ compensation claims. Mr. Sigler helped his client obtain complete dismissal of all claims and affirmance on appeal.
- Sanzone v. Aetna, Elizabeth L. v. Aetna, and Daniel F. v. Aetna (N.D. Cal.), a trio of class actions, filed in the same court over the course of several years, challenging various behavioral health coverage practices by a managed care company under ERISA and mental health parity laws. Mr. Sigler helped his client win all of the cases—he obtained dismissal of two and denial of class certification in the third.
- In re Tropicana Orange Juice Marketing and Sales Practices Litigation (D.N.J.), a nationwide class action brought by consumers who challenge the marketing of orange juice. Mr. Sigler helped his client obtain denial of class certification.
- Wilson v. Frito-Lay North America, Inc. (N.D. Cal.), a class action brought by California consumers who challenge the labeling of snack products. Mr. Sigler helped his client obtain summary judgment.
- United States ex rel. Swoben v. SCAN (S.D. Cal.), a qui tam False Claims Act complaint challenging risk adjustment practices by multiple Medicare Advantage companies. Mr. Sigler helped his client obtain dismissal with prejudice. On appeal, Mr. Sigler spearheaded a rehearing petition that resulted in his client’s dismissal being upheld despite reinstatement of claims against other defendants.
- AHIP v. Hudgens (N.D. Ga.), a legal challenge to a Georgia state “prompt pay” law brought by Mr. Sigler’s client, a trade association representing administrators of health benefits plans. Mr. Sigler helped his client obtain a permanent injunction blocking enforcement of the challenged law and affirmance on appeal.
- Peterson v. Aetna (S.D.N.Y.), a lawsuit that arose out of a dispute between the acquiring company and the sellers over the purchase price and valuation of the acquired company. Mr. Sigler spearheaded a counterclaim strategy by which the acquiring company, the defendant, sought damages from the sellers, who were the plaintiffs, based on breaches of representations and warranties.
Mr. Sigler also has represented corporate clients, audit committees, and individuals in investigations by the United States Department of Justice, the Department of Labor, the Securities and Exchange Commission, state attorneys general, and other federal and state regulators.
Mr. Sigler graduated from the University of Virginia School of Law in 2001, where he was Articles Development Editor of the Virginia Journal of Social Policy and the Law. He received his Bachelor of Arts degree magna cum laude from the University of Richmond in 1998. Mr. Sigler is a member of the bars of the District of Columbia and Virginia.