Leah Greenberg Katz

Leah Greenberg Katz


Philadelphia, PA
Phone: 215.981.4547    Fax: 215.981.4750


  • representing a multinational health care analytics company as a defendant and counterclaim plaintiff in litigation involving claims of antitrust violations, misappropriation of trade secrets and tortious interference with employment contracts
  • currently representing multiple payors across the country in Administrative Procedures Act litigation challenging CMS risk adjustment methodology for ACA market exchanges
  • counseled hospital system regarding potential claims for breach of contract and improper administration of risk sharing program
  • counseled client regarding compliance with mental health parity regulations
  • represented health insurance industry trade association in appellate briefing regarding CMS risk corridor program
  • representing health care providers in responding to Medicare (ZPIC) audits, including appealing denied claims and demands for repayment
  • defending building materials manufacturer in MDL class action and opt out litigation.


  • J.D., magna cum laude, Villanova University School of Law, 2009, Order of the Coif; associate editor, Villanova Law Review; awarded Hyman-Goodman Award for Outstanding Academic and Extracurricular Achievement.
  • B.A., Philosophy, cum laude, with honors, Washington and Lee University, 2005

Bar Admissions

  • Pennsylvania
  • New Jersey

Court Admissions

  • U.S. Court of Appeals, Third Circuit
  • U.S. District Court, Eastern District of Pennsylvania


  • Honorable Mary L. Cooper: U.S. District Court, District of New Jersey, Trenton, NJ

Practice Areas

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