Warren Haskel - McDermott Will & Emery


Warren Haskel is a commercial litigator who represents clients in class actions and other complex litigation throughout the country, including in federal and state trial courts, arbitration proceedings, and appeals. His matters have spanned a variety of industries, with a focus in healthcare, consumer products, and private equity.

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  • Represented healthcare insurance company in a putative class action brought by substance abuse treatment facilities challenging the company’s reimbursement of out-of-network claims based on pricing supplied by a third-party vendor, including under antitrust and RICO theories. Successfully moved to dismiss the complaint in its entirety, including the antitrust claims with prejudice. Instead of amending their complaint, the facilities voluntarily dismissed
  • Represented a health insurance company in a series of putative class actions alleging ERISA, antitrust, and RICO violations regarding the health insurer’s payment practices for out-of-network benefits based on insurer’s use of a third-party database. District court denied health plan subscribers’ multiple motions for class certification and granted summary judgment to client, and the Third Circuit affirmed*

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  • Legal 500 US, 2021 and 2022
  • Chambers USA, 2021, Commercial Disputes
  • Super Lawyer, Rising Star, 2015–2019
  • Recipient of The Legal Aid Society’s 2010 Pro Bono Publico Award


Tulane University Law School, JD, magna cum laude, Order of the Coif, 2008
New York University, BA, cum laude, 2004

US Court of Appeals for the Third Circuit
US Court of Appeals for the Fifth Circuit
US Court of Appeals for the Ninth Circuit
US District Court for the Eastern District of New York
US District Court for the Southern District of New York
US District Court for the District of Colorado

New York