Leonard M. Rosenberg

Partner/Director
Leonard M. Rosenberg

Leonard M. Rosenberg

Partner/Director

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Leonard M. Rosenberg is a Co-Chair of the firm’s Litigation and Alternative Dispute Resolution, and Employment and Workforce Management practice groups.

Leonard represents and counsels clients in federal and state court civil and administrative trials, appeals, arbitrations, hearings, and mediations. His practice includes litigation of a wide variety of health care, regulatory, commercial and business issues, including contract disputes, managed care audits, directors and officers insurance coverage disputes, and judicial review of agency and other administrative determinations.

Leonard’s health care practice includes over 30 years of experience representing hospitals, physicians, medical boards and trustees in medical staff credentialing and peer review matters, including intra-hospital hearings and appeals, proceedings before the New York State Public Health council, and litigation arising from the peer review process. Leonard also counsels and represents physicians in professional conduct proceedings before the New York State Department of Health, Office of Professional Medical Conduct (OPMC).

Leonard also has a broad employment law practice, defending clients against all types of employment claims, including age, race, gender, national origin, and harassment, as well as claims under the Americans With Disabilities Act, Family and Medical Leave Act, Fair Labor Standards Act, False Claims Act, whistleblower laws, wrongful discharge, breach of employment contract, defamation, and non-compete/restrictive covenant agreements.

Leonard is the editor of “In The New York State Courts,” a summary of recent court decisions in health care law. The column is a regular feature of the Health Law Journal published by the New York State Bar Association.

Leonard is also Vice Chair of the Editorial Board of The Health Lawyer, a journal published by the American Bar Association, Vice Chair of Programming of the ABA’s Health Care Litigation and Risk Management Interest Group, and incoming Chair of the Nassau County Bar Association Hospital and Health Law Committee.

April 2, 2024|Firm News

Garfunkel Wild Scores Court Victory, Makes New Law, in Medical Staff Lawsuit

Garfunkel Wild achieved dismissal of a federal court discrimination suit filed by a cardiologist who was denied privileges to perform advanced electrophysiology procedures at South Shore University Hospital due to lack of experience.  

September 22, 2023|Firm News

Garfunkel Wild Attorneys Recognized as 2023 Super Lawyers and Rising Stars

Garfunkel Wild attorneys have once again been selected by their peers for inclusion in the 2023 edition of Super Lawyers.

February 28, 2023|Firm News

Garfunkel Wild Scores Appellate Victory In Long-Running Data Bank Litigation

After more than 10 years of highly contentious litigation, Garfunkel Wild won summary judgment dismissal in the trial court, and prevailed against the surgeon’s appeal.

September 29, 2022|Awards

33 Garfunkel Wild Attorneys Named 2022 New York Super Lawyers and Rising Stars

Thirty-Three Garfunkel Wild attorneys were selected by their peers for inclusion in 2022 New York Metro Super Lawyers, and 2022 New York Metro/Upstate New York Rising Stars.

October 13, 2021|Firm News

Garfunkel Wild Defeats Defamation, Fraud, Contract and Tortious Interference Claims Against Peconic Bay Medical Center

Garfunkel Wild secured a significant victory in obtaining dismissal of a multi-million dollar suit based on its filing of a report with the National Practitioner Data Bank that a physician resigned while under investigation. 

September 30, 2021|Awards

Thirty-Six Garfunkel Wild Attorneys Named 2021 New York Super Lawyers and Rising Stars

Thirty-Six Garfunkel Wild attorneys were selected by their peers for inclusion in 2021 New York Metro Super Lawyers, and 2021 New York Metro/Upstate New York Rising Stars.

October 28, 2020|Awards

Thirty-Six Garfunkel Wild Attorneys Named 2020 New York Super Lawyers and Rising Stars

Thirty-Six Garfunkel Wild attorneys were selected by their peers for inclusion in 2020 New York Metro Super Lawyers, and 2020 New York Metro/Upstate Rising Stars.

September 13, 2019|Awards

Thirty-Four Garfunkel Wild Attorneys Named 2019 New York Super Lawyers and Rising Stars

Thirty-Four Garfunkel Wild attorneys were selected by their peers for inclusion in 2019 New York Metro Super Lawyers, and 2019 New York Metro Rising Stars.

September 5, 2019|Firm News

Garfunkel Wild Wins Summary Judgment for Employer Seeking MLMIC Demutualization Funds

Garfunkel Wild Wins Summary Judgment for Employer Seeking MLMIC Demutualization Funds

October 24, 2024|Firm News

36 Garfunkel Wild Attorneys Recognized as 2024 Super Lawyers, Rising Stars

Super Lawyers has recognized 36 Garfunkel Wild Attorneys across a range of the firm’s practice areas to the 2024 Super Lawyers and Rising Stars list.

September 16, 2024|Firm News

Garfunkel Wild Secures Victory for NYU Grossman School of Medicine in Medical Staff Litigation

Garfunkel Wild successfully represented NYU Grossman School of Medicine in a high-profile medical staff litigation, marking the first case in New York state court to require Public Health and Health Planning Council review prior to filing suit alleging discrimination under the New York State Human Rights Law.

October 30, 2024|Events

11th Annual ASC and Health Care Management Symposium

Garfunkel Wild's 11th Annual ASC and Health Care Management Virtual Symposium is dedicated to the most important business, legal, clinical, and operational issues facing the ASC and health care management community.

July 8, 2020|Publications

Leonard M. Rosenberg and Nicholas M. Summo Co-Authored an Article Published in the American Bar Association’s Health Law Litigation – Section of Litigation

Partner Leonard M. Rosenberg and Associate Nicholas M. Summo, co-authored the article “Physicians Convicted for Patient Deaths from Opioid Overdoses,” published in the American Bar Association’s Health Law Litigation – Section of Litigation, July 6, 2020 (Summer 2020, Vol. 16 No.2).

April 22, 2020|Events

Strafford CLE Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies

Garfunkel Wild Partner/Director Leonard M. Rosenberg will present at the Strafford Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies on April 22, 2020.

February 18, 2019|Publications

In the New York State Courts (New York State Bar Associations Health Law Journal Winter 2018)

Partner/Director Leonard M. Rosenberg, had his article “In the New York State Courts,” published in the Winter 2018 (Volume 23, Number 3) issue of the  New York State Bar Association’s Health Law Journal.

Additional speaking & writing

Speeches and Events

  • Is Your Website In Compliance With The Americans with Disabilities Act?  Legal Issues and Proactive Strategies.
  • Nassau County Bar Association Hospital and Health Law Committee, March 7, 2019
  • National Practitioner Data Bank Master Class, ABA Health Law Section CLE Webinar, June 14, 2018
  • Hospital Medical Staff Credentialing Issues From The Hospital and Physician Perspectives.
    Nassau County Bar Association Hospital and Health Law Committee, May 3, 2018

Leonard M. Rosenberg is a Co-Chair of the firm’s Litigation and Alternative Dispute Resolution, and Employment and Workforce Management practice groups.

Leonard represents and counsels clients in federal and state court civil and administrative trials, appeals, arbitrations, hearings, and mediations. His practice includes litigation of a wide variety of health care, regulatory, commercial and business issues, including contract disputes, managed care audits, directors and officers insurance coverage disputes, and judicial review of agency and other administrative determinations.

Leonard’s health care practice includes over 30 years of experience representing hospitals, physicians, medical boards and trustees in medical staff credentialing and peer review matters, including intra-hospital hearings and appeals, proceedings before the New York State Public Health council, and litigation arising from the peer review process. Leonard also counsels and represents physicians in professional conduct proceedings before the New York State Department of Health, Office of Professional Medical Conduct (OPMC).

Leonard also has a broad employment law practice, defending clients against all types of employment claims, including age, race, gender, national origin, and harassment, as well as claims under the Americans With Disabilities Act, Family and Medical Leave Act, Fair Labor Standards Act, False Claims Act, whistleblower laws, wrongful discharge, breach of employment contract, defamation, and non-compete/restrictive covenant agreements.

Leonard is the editor of “In The New York State Courts,” a summary of recent court decisions in health care law. The column is a regular feature of the Health Law Journal published by the New York State Bar Association.

Leonard is also Vice Chair of the Editorial Board of The Health Lawyer, a journal published by the American Bar Association, Vice Chair of Programming of the ABA’s Health Care Litigation and Risk Management Interest Group, and incoming Chair of the Nassau County Bar Association Hospital and Health Law Committee.

July 8, 2020

Leonard M. Rosenberg and Nicholas M. Summo Co-Authored an Article Published in the American Bar Association’s Health Law Litigation – Section of Litigation

Partner Leonard M. Rosenberg and Associate Nicholas M. Summo, co-authored the article “Physicians Convicted for Patient Deaths from Opioid Overdoses,” published in the American Bar Association’s Health Law Litigation – Section of Litigation, July 6, 2020 (Summer 2020, Vol. 16 No.2).

February 18, 2019

In the New York State Courts (New York State Bar Associations Health Law Journal Winter 2018)

Partner/Director Leonard M. Rosenberg, had his article “In the New York State Courts,” published in the Winter 2018 (Volume 23, Number 3) issue of the  New York State Bar Association’s Health Law Journal.

April 22, 2020

Strafford CLE Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies

Garfunkel Wild Partner/Director Leonard M. Rosenberg will present at the Strafford Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies on April 22, 2020.

October 30, 2024

11th Annual ASC and Health Care Management Symposium

Garfunkel Wild's 11th Annual ASC and Health Care Management Virtual Symposium is dedicated to the most important business, legal, clinical, and operational issues facing the ASC and health care management community.

October 30, 2024|Events

11th Annual ASC and Health Care Management Symposium

Garfunkel Wild's 11th Annual ASC and Health Care Management Virtual Symposium is dedicated to the most important business, legal, clinical, and operational issues facing the ASC and health care management community.

July 8, 2020|Publications

Leonard M. Rosenberg and Nicholas M. Summo Co-Authored an Article Published in the American Bar Association’s Health Law Litigation – Section of Litigation

Partner Leonard M. Rosenberg and Associate Nicholas M. Summo, co-authored the article “Physicians Convicted for Patient Deaths from Opioid Overdoses,” published in the American Bar Association’s Health Law Litigation – Section of Litigation, July 6, 2020 (Summer 2020, Vol. 16 No.2).

April 22, 2020|Events

Strafford CLE Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies

Garfunkel Wild Partner/Director Leonard M. Rosenberg will present at the Strafford Webinar – National Practitioner Data Bank: Hospital Reporting Obligations, Reporting Immunity, and Physician Strategies on April 22, 2020.

February 18, 2019|Publications

In the New York State Courts (New York State Bar Associations Health Law Journal Winter 2018)

Partner/Director Leonard M. Rosenberg, had his article “In the New York State Courts,” published in the Winter 2018 (Volume 23, Number 3) issue of the  New York State Bar Association’s Health Law Journal.

Additional speaking & writing

Speeches and Events

  • Is Your Website In Compliance With The Americans with Disabilities Act?  Legal Issues and Proactive Strategies.
  • Nassau County Bar Association Hospital and Health Law Committee, March 7, 2019
  • National Practitioner Data Bank Master Class, ABA Health Law Section CLE Webinar, June 14, 2018
  • Hospital Medical Staff Credentialing Issues From The Hospital and Physician Perspectives.
    Nassau County Bar Association Hospital and Health Law Committee, May 3, 2018
Education
J.D.,
Boston University School of Law,
1979,


B.S.,
Cornell University,
1976,
Bar Admissions
  • New York
Court admissions

U.S. Supreme Court

U.S. District Court: Southern District of New York

U.S. District Court: Eastern District of New York

U.S. District Court: Northern District of New York

New York Supreme Court

PROFESSIONAL MEMBERSHIPS
  • American Bar Association (Chair, Health Lawyer Editorial Board, eff. 9/1/20)
  • American Health Law Association
  • New York State Bar Association (Sustaining Member)
  • Nassau County Bar Association (Sustaining Member)
AWARDS & RANKINGS
  • Super Lawyers – New York Metro (2013-2024)