William J. Natbony 

Counsel – New York
T.+1 212 504 6351
200 Liberty Street
New York, NY 10281 V-CARD

For more than 35 years, Bill Natbony has devoted his practice to the prosecution and defense of insurance and health care litigation as well as complex general commercial litigation matters, including trials, with particular emphasis and experience in the areas of financial and mortgage fraud, insurance law, no fault, business fraud, breach of contract, RICO, Medicaid/Medicare reimbursement, administrative agency rulemaking bankruptcy and employment disputes. He has represented numerous insurance companies, re-insurers, banks, nursing homes, hospitals, physicians, physician management groups and provider associations. He has substantial experience litigating against state and municipal entities.

Bill's experience has included significant litigation challenging fraudulent no-fault billing and the improper licensing and structure of health care providers. By way of example, Bill has represented major automobile carriers in significant no-fault civil recovery actions against numerous provider, management company and individual defendants. These litigations have resulted in the waiver of substantial pending no-fault claims and the recovery of substantial funds for these insurer clients. He has also represented groups of insurers seeking to recover substantial no-fault funds paid to diagnostic imaging centers as a result of fraudulent billing activities, including the payment for case referrals in violation of New York law. Bill's practice also includes advising insurers concerning their investigatory and claim activities.

Bill’s experience has also included representing bond insurers in substantial disputes regarding municipal defaults and restructuring issues, including as part of substantial federal litigation related to the financial crisis in Puerto Rico and the unprecedented restructuring proceedings of the Commonwealth and related entities, under the newly enacted federal law, PROMESA.

Bill's experience also includes representing financial institutions in litigation involving the buying/selling of mortgage loans and securities, the obligations/termination of mortgage loan servicers, and the interpretation and enforcement of complex commercial agreements, including SWAP agreements.

Bill is a 1980 cum laude graduate of Princeton University and obtained his law degree from Georgetown University Law Center in 1983. Prior to joining Cadwalader in 1984, Bill served as Law Clerk to D.C. Court of Appeal Judge John Kern and District of Columbia District Judges George Hart and Charles Richey .

Bill’s community service and pro bono activities have involved the representation of religious institutions, not-for profit institutions, educational institutions and homeless groups.  Bill has served as a Board Member and President of the Scarsdale Board of Education and coordinates Cadwalader’s mentorship and coaching of high school students through the New York Justice Resource Center’s MENTOR Program.



William J. Natbony 


  • U.S. District Court, Eastern District of New York
  • U.S. District Court, Southern District of New York
  • District of Columbia
  • New York


  • Hon. George L. Hart Jr.
    U.S. District Court, District of Columbia


  • Georgetown University Law Center
    J.D., 1983
  • Princeton University
    B.A., 1980, cum laude