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Lauren R. Nunez

Phone: +1 202.624.2559
1001 Pennsylvania Avenue NW
Washington, DC 20004

Lauren R. Nunez is a counsel in Crowell & Moring’s Washington, D.C. office where she is a member of the firm’s Health Care Group. Her practice covers a wide range of litigation and counseling engagements, including representing leading managed care organizations, health benefit plans, health care providers, government contractors, and various other corporate commercial litigants. Lauren litigates complex matters in federal, state, and arbitral forums, with a particular focus on commercial health care disputes, class actions, civil antitrust, and False Claims Act suits. Lauren’s antitrust experience includes mergers and acquisitions and civil antitrust cases. She has represented clients in investigations before the Department of Justice, the Federal Trade Commission, the Department of Labor, and various state enforcement agencies.

Representative engagements include:

  • Trying case behalf of leading health services company to defense verdict in $150 million action involving fraud and breach of contract claims related to the design, build, and operation of a health plan.
  • Defending managed behavioral health care organization in response to a joint state and federal investigation of compliance with the Mental Health Parity and Addiction Equity Act for both fully-insured and self-funded plans. 
  • Representing a health system in an FTC investigation. 
  • Representing multiple health plans in complex commercial disputes with pharmacy benefit managers and retail pharmacies regarding pharmaceutical reimbursement. 
  • Defending leading health plan in multiple class actions in federal court concerning compliance with the Mental Health Parity and Addiction Equity Act.
  • Defending a large health insurer in multiple arbitration proceedings across the nation involving a Medicare Advantage dispute.
  • Representing a Medicaid managed care organization in complex litigation with a state concerning actuarial soundness of capitation rates, government contracting, and related performance and transition of care issues.
  • Defending a leading health plan in arbitration against a major hospital system in Florida regarding payment of behavioral health claims.

Lauren maintains an active pro bono practice in which she litigates education access cases on behalf of parents of children with special needs and practices complex appellate litigation under the Hague Convention on the Civil Aspects of International Child Abduction.

Prior to joining Crowell & Moring, Lauren worked as an associate at a firm in Boston, where she practiced in complex commercial litigation and health care fraud investigations. Before that, Lauren interned for the Honorable Ojetta Rogeriee Thompson on the U.S. Court of Appeals for the First Circuit and the Honorable William Q. Hayes on the U.S. District Court for the Southern District of California in San Diego.

Lauren graduated from Notre Dame Law School summa cum laude, where she was the executive notes editor of the Notre Dame Law Review. Lauren received her B.A. from Providence College with a double major in economics and political science.


  • Providence College, B.A. (2010) summa cum laude
  • University of Notre Dame Law School, J.D. (2013) summa cum laude


Admitted to practice: District of Columbia, Massachusetts, U.S. District Court for the District of Massachusetts

Professional Memberships

  • American Health Lawyers Association

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"MHPAEA: Compliance Requirements and Enforcement Risks," Healthcare Ounce of Prevention Seminar (HOOPS) 2021: Health Care in the Biden Era (February 24, 2021). Presenters: A. Xavier Baker and Lauren R. Nunez.
"2020 Medicaid Managed Care Rule Summary," Crowell & Moring’s Health Law Blog (February 16, 2021). Authors: Kelly Hightower Hibbert, Lauren R. Nunez and Michelle Chipetine.
"COVID Relief and Appropriations Legislation Includes Mental Health Parity Compliance and Oversight Requirements," Health Care Alert (December 23, 2020). Contacts: Michael W. Lieberman, Lauren R. Nunez, Joe Records
Client Alert / Newsletter
"Increased State Innovation Aimed at Stabilizing ACA Marketplaces," Crowell & Moring's Health Law Blog (February 18, 2020). Author: Lauren R. Nunez.
Crowell & Moring Elects Eight New Partners and Promotes 21 Associates to Counsel (Jan.03.2019)
Firm News / Announcement
"Henry Ford Allegiance Settles Antitrust Claims Alleging Coordinated Marketing Scheme," Antitrust Law Alert (February 13, 2018). Contacts: Alexis J. Gilman, Lauren R. Nunez
Client Alert / Newsletter
"Charitable Donations Not Grounds for False Claims Act Liability, But Government Scrutiny Continues," Health Care Alert (January 25, 2018). Contacts: Brian Tully McLaughlin, Troy A. Barsky, John T. Brennan Jr., Lauren R. Nunez, Rochelle-Leigh Rosenberg
Client Alert / Newsletter
"CMS's Proposed Rule for Contract Year 2019 Is a Mixed Bag for Medicare Advantage Organizations and Prescription Drug Plan Sponsors," Health Care Alert (November 30, 2017). Contacts: Gary Baldwin, Barbara H. Ryland, Lauren R. Nunez, Rochelle-Leigh Rosenberg, Matthew Vicinanzo
Client Alert / Newsletter
"Managed Care Lawsuit Watch - February 2017," Managed Care Lawsuit Watch (February 2, 2017). Contacts: Christopher Flynn, Peter Roan, Brian C. Lewis, Rochelle-Leigh Rosenberg, Lauren R. Nunez
Client Alert / Newsletter
"Managed Care Lawsuit Watch - August 2016," Managed Care Lawsuit Watch (September 6, 2016). Contacts: Christopher Flynn, Peter Roan, Lauren R. Nunez, Rochelle-Leigh Rosenberg, Joe Records, Brian C. Lewis
Client Alert / Newsletter

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Crowell & Moring LLP is an international law firm with offices in the United States, Europe, MENA, and Asia that represents clients in litigation and arbitration, regulatory and policy, and transactional and corporate matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation and government-facing matters, as well as its ongoing commitment to pro bono service and diversity, equity, and inclusion.

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