William P. Keefer

Practice Group Leader - Corporate

Buffalo; New York City
(716) 847-5488
(212) 759-4888 ext. 5488
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As leader of Phillips Lytle’s Health Care Law Practice Team, Mr. Keefer counsels hospitals, physician groups, payors and other health care clients on a broad array of issues, including fraud and abuse, corporate compliance, transactional arrangements, payer audits, agency actions, and federal and state court litigation.

Admitted to Practice

  • New York
  • Massachusetts
  • U.S. District Court, Northern District of New York
  • U.S. District Court, Western District of New York

Honors and Awards

  • City & State New York, Health Care 100 List, 2023
  • Listed in The Best Lawyers in America©
    • Named the Best Lawyers® Health Care Law “Lawyer of the Year” in Buffalo, 2023
  • Selected for the Upstate New York Super Lawyers® list, 2017-2022
  • Listed in Legal Elite of WNY, Business First of Buffalo and Buffalo Law Journal, 2015, 2017- 2018


  • The George Washington University Law School, J.D., with honors, 1991
  • St. Bonaventure University, B.B.A., magna cum laude, 1985

Professional Associations

  • American Bar Association
    • Business Law Section
    • Health Law Section
  • American Health Lawyers Association
    • Fraud and Abuse Practice Group
    • Regulation, Accreditation and Payment Practice Group
  • Bar Association of Erie County
    • Health Law Committee
    • Commercial and Bankruptcy Committee
  • New York State Bar Association
    • Health Law Section, Secretary
      • Payment, Enforcement and Compliance Committee, Chair


  • Certified Public Accountant, New York State, 1987

Present Activities

  • SABAH, Inc., Board of Directors
    • Past Chair and Past Treasurer
  • Rotary Club of Buffalo, Member
    • Board of Directors, Former Member
  • Buffalo Philharmonic Orchestra, Board of Trustees

Past Activities

  • Buffalo Rotary Foundation, President
  • Erie County Bar Association Health Law Committee, Chair
  • Mary M. Gooley Hemophilia Center, Inc., Board of Directors
  • Canisius High School Mock Trial Team, Attorney Coach