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Diane Roldán

Diane is a litigator who specializes in representing hospitals and medical staffs.
Diane B. Roldán, Associate, Arent Fox LLP

Diane is an associate in the Health Care and Complex Litigation practices at Arent Fox. Diane helps clients resolve disputes, including through mediation, litigation, arbitration, administrative hearings and writ proceedings. She counsels clients at every stage of litigation, from the initial complaint to the winning verdict.

Diane specializes in the health care sector. She currently represents hospitals, medical staffs, residency programs, health care districts, and major health care systems throughout California in complex litigation, peer review proceedings, and administrative hearings. She is a trusted advisor to clients on regulatory reporting, credentialing procedures, and fair hearing rights.

Diane also represents midsize businesses, national corporations, and investors in state and federal court, as well as numerous forms of domestic and international arbitrations. In 2017, Diane's successful jury trial verdict was named one of the Top 25 verdicts in California for breach of contract.

Prior to joining Arent Fox, Diane clerked for the Honorable John R. Fisher of the D.C. Court of Appeals in Washington, D.C.  Diane received her law degree from Stanford Law School, where she was named a 2011 Stanford Public Interest Fellow.

Health Care Litigation & Peer Review

  • Diane currently represents hospital medical staffs throughout California in multiple peer review hearings involving summary suspensions, restrictions, and termination recommendations.
  • Diane is counsel to a large California health system in civil litigation involving a summary suspension of a physician's privileges, alleged whistleblower retaliation, and the Anti-SLAPP statute.  The case is currently pending before the California Supreme Court.
  • Diane represents the California Hospital Association as an amicus curiae to the California Supreme Court on the issue of peer review hearing officer neutrality.
  • Diane advises a California public healthcare district on breach of contract litigation in state court.
  • In 2019, Diane successfully defended a leading Southern California hospital’s residency program against claims of whistleblower retaliation, sexual harassment, and breach of contract brought by a former resident.

Health Care Counseling

  • Diane regularly speaks and advises clients on regulatory reporting requirements, including National Practitioner Data Bank (NPDB) reports and Medical Board of California Section 805 reports.
  • Diane supports hospitals and medical staffs during California Medical Board investigations, including responding to subpoenas and witness interview requests.
  • Diane has extensive experience advising medical staffs on credentialing standards for new applicants and reappointments.
  • Diane also assists hospitals in revising their medical staff bylaws to conform with modern best practices.

Complex Civil Litigation

  • Diane recently won a complete jury trial victory in California state court for a client whose former employee stole millions of dollars’ worth of trade secrets before joining a major competitor in China. This case was named one of the Top 25 breach of contract verdicts in California in 2017 by Top Verdicts.
  • Diane represented a footwear company against state and federal claims alleging trade secret theft, patent infringement, breach of contract, and unfair competition, resulting in a favorable settlement.
  • Diane defended Chevron U.S.A. Inc. and Chevron Corp., in connection with claims filed by the City of Richmond related to a 2012 refinery fire in Richmond, California. Prior to trial, the case settled for a nominal amount in 2018.
  • Diane defended a multinational energy company in AAA arbitration against a supplier alleging breach of contract.
  • Diane represented a California cannabis company against claims of breach of contract, fraud, and unjust enrichment.

International Arbitration

  • Diane represented the sovereign nation Timor-Leste in two international arbitrations under UNCITRAL rules and a state-to-state arbitration at the Permanent Court of Arbitration in The Hague. 
  • Diane defended multiple international investors alleging expropriation under NAFTA and a Spanish distributor in an ICC arbitration with its U.S.-based supplier.    
  • Diane represented a telecommunications company alleging expropriation of assets by a sovereign state under NAFTA.
  • Diane successfully convinced the US Treasury Department’s Office of Foreign Assets Control (OFAC) to remove a Zimbabwean corporation from the Specially Designated Nationals (SDN) and Blocked Persons list.
  • Diane won a complete victory for a pro bono client, when the United Nations Mechanism for International Criminal Tribunals (UN MICT) withdrew its allegation of contempt against a film production company screening its award-winning documentary, chronicling the first-ever prosecution of rape as a crime of war.

Publications & Presentations

Dianes recent publications and presentations include:

  • “Whistleblower Lawsuits & Interminable Hearings: Protecting Peer Review in an Increasingly Litigious State,” California Association for Medical Staff Services (CAMSS) 2020 Education Series, Online, July 23, 2020.

  • “NPDB Reporting Deadlines Remain Firm Despite COVID-19 Emergency,” May 12, 2020.

  • “UCLA Escapes $13 Million Gender Discrimination Verdict in Favor of Physician,” April 29, 2020.

  • “California Attorney General Clarifies State Reporting Deadlines for Medical Staff Discipline,” April 23, 2020.

  • Rescheduled due to COVID-19: “Anti-SLAPP in Peer Review: The Evolution Continues,” California Society for Healthcare Attorneys (CSHA) Spring Conference, Apr. 24, 2020, link to brochure.
  • “The Corrective Action Tool Box: What Options Do You Have?,” Medical Staff Leaders and the Law Conference, San Francisco and Costa Mesa, Feb. 28, 2020 and Mar. 6, 2020, link to brochure.
  • “Federal Agency Sues Hospital Over Late Career Practitioner Policy,” Feb. 14, 2020.
  • “Working Across Generations,” Chief of Staff Boot Camp, Marina del Rey, Feb. 7, 2020.
  • “Update: California Court of Appeal Orders Publication of Natarajan v. Dignity Health,” Dec. 9, 2019.
  • “Court of Appeal Rejects Bias Challenge to Peer Review Hearing Officer,” Oct. 23, 2019.
  • “USC Gynecologist Accused of Sexual Abuse Surrenders Medical License,” Sept. 10, 2019.
  • “The Anti-SLAPP Evolution Continues: California Supreme Court Confirms Anti-SLAPP Protection Can Apply to Retaliation and Discrimination Claims,” Jul. 25, 2019.
  • “Teaming With Your Lawyers to Avoid Lawsuits: Strategies for Medical Staffs and Hospitals,” Medical Staff Leaders and the Law 2019: San Francisco, Mar. 1, 2019.
  • “Is It Reportable? HRSA Updates NPDB Guidebook for the First Time in Three Years,” Nov. 8, 2018.
  • “Arbitration in California,” Delos Dispute Resolution’s Guide to Arbitration Places, 2018.
  • “Whistleblower Lawsuits and Peer Review,” Medical Staff Leaders and the Law 2018: Costa Mesa, Feb. 2018.
  • “Making the Most of Prejudgment Writs of Attachment,” Los Angeles Lawyer, September 2017.