People

Joshua B. Simon

Partner

New York – One Vanderbilt Avenue

Areas of focus

Leads complex litigation in state and federal courts and in arbitration and regulatory proceedings across the United States

Has extensive experience in significant matters involving the health insurance industry

Serves as lead counsel in disputes involving claims payment, fraudulent billing, competition, contracting, and medical necessity coverage determinations

Joshua (Josh) Simon leads the global Litigation Group. He litigates complex matters in state and federal courts across the United States and represents clients in arbitrations and regulatory proceedings.

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Ranked in

Ranked in

Legal 500 US 2025

Results
  • Represented a leading health insurer in a series of antitrust cases alleging industry-wide price fixing conspiracy related to out-of-network claims payments
  • Represented a leading health insurer in class actions challenging alleged use of artificial intelligence to make medical necessity determinations
  • Represented a leading health insurer in a series of putative class actions alleging ERISA, RICO, and antitrust violations based on the health insurer’s payment practices, as well as related investigations by state regulators*
  • Represented a leading health insurer in a series of antitrust cases alleging that client conspired with other health insurers to drive certain healthcare providers from the market*
  • Represented a leading health insurer in a series of putative class actions alleging improper calculation of member cost sharing and deductibles*

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Recognitions
  • Legal 500 US, 2021 and 2023-2025
  • Chambers USA, ERISA Litigation, 2021
  • Super Lawyers, Rising Star, 2014
Capabilities and industries
Regional markets
Community
  • McDermott Will & Schulte Litigation Group, global head
  • McDermott Will & Schulte Management Committee, member
Credentials
Education
  • Harvard Law School, JD, cum laude
  • Princeton University, BA, cum laude
Admissions
  • New York
Courts / Agencies
  • US District Court for the Southern District of New York
Languages
  • English