Glenda Zarbock

Glenda M. Zarbock


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San Francisco

Glenda specializes in advising medical staffs, medical groups, and hospitals on a full range of credentialing, peer review, and quality assurance topics. She advises medical staffs on investigations and developing corrective action plans and recommendations. Glenda has successfully represented numerous medical staffs in formal hearings involving credentialing and peer review actions. She also serves in the role of hearing officer for judicial review committee hearings and for appeals to hospital boards. As a litigator, Glenda defends hospitals, medical staffs, and medical staff leaders in civil litigation arising from peer review activities.

Glenda also represents health care providers and senior care communities in administrative proceedings and litigation in a wide array of matters. She handles appeals of regulatory citations, deficiencies, and licensure actions, as well as lawsuits alleging professional negligence, elder abuse, wrongful death, fraud, and breach of contract. Glenda handles all phases of litigation: discovery, law and motion practice, mediation, arbitration, administrative hearings, trials, writs and appeals.

Glenda makes presentations on legal issues to gatherings of the California Association Medical Staff Services, National Association Medical Staff Services, California Assisted Living Association, LeadingAge California, and California Association of Health Facilities.

Representative Work

On behalf of hospital clients, Glenda secured early dismissal of multiple lawsuits filed by physicians arising from peer review actions using California's anti-SLAPP statute. 

Glenda defeated applications for preliminary injunctions filed against two hospitals by a number of specialty physicians seeking an order allowing them to exercise their clinical privileges despite their not being members of the medical group that held the exclusive contract to provide these specialty services at the hospitals. She subsequently secured summary judgment in the hospital’s favor in one lawsuit, and the physician plaintiffs then voluntarily dismissed their other lawsuit.

Glenda negotiated a settlement of an accusation issued by the Department of Social Services seeking to revoke the probationary license of a Residential Care Facility for the Elderly, enabling the provider to avoid a costly administrative hearing and to continue operating under conditions acceptable to the provider.


“Lessons Learned from Litigating Physician Claims Against Medical Staffs and Medical Staff Leadership,” CAMSS 46th Annual Education Forum (June 2017)

"Legal Update," CAMSS 45th Annual Education Forum (May 2016)

"Ways to Guard Against the Physician Whistleblower Lawsuit," co-speaker, AHLA Practice Groups Webinar (April 2016)

"Legal Update: What's New in Medical Staff Law and How to be Ready for It," co-speaker, California Association Medical Staff Services 44th Annual Education Forum (May 2015)

“The Meaning of Investigation in Peer Review Matters and Privileges, Immunities, and Pitfalls in Peer Review,” co-speaker, California Association Medical Staff Services 43rd Annual Education Forum (May 2014)

“Medical Staff Bylaws: Pitfalls and Best Practices,” and “Fair Hearings for the Allied Health Professional,” co-speaker, California Association of Medical Staff Services (October 2013)

"Avoid the Top DSS-Cited Regulatory Deficiencies," LeadingAge California (May 2013)

"A Practical Approach to Legal Issues—Aging & Re-Entry Practitioners; Court Orders, Arrests and Probation Outside the Medical Arena," co-speaker, California Association of Medical Staff Services (November 2012)

"Late Career Physicians: The Pros and Cons of Adopting a Policy Triggered by a Physician’s Age," co-speaker, National Association Medical Staff Services (September 2012)

"Physician Behavior Contracts," California Association of Medical Staff Services (June 2012)

“The Top 10 List: Avoiding Common Deficiencies,” California Assisted Living Association (June 2012)

"Legal Update," California Association Medical Staff Services, 41st Annual Education Forum (May 2012)

"Covering Your Assets: The 10 Leading Causes of Liability for Assisted Living Providers," California Assisted Living Association (April 2012)

"AB655: Understanding the New Law Affecting Responses to Credentialing Inquiries," California Association Medical Staff Services, Bay Area Chapter & Steinbeck Chapter (February 2012)

"Legal Update," California Association Medical Staff Services, Annual Educational Forum (May 2011)

"Understanding and Contesting Federal Deficiencies," LeadingAge, CA webinar (July 2010)

See All Presentations

Professional Affiliations

California Society for Healthcare Attorneys

American Health Lawyers Association, Medical Staff, Credentialing, and Peer Review and Long Term Care and Senior Housing Practice Groups

California Association Medical Staff Services

LeadingAge California

California Assisted Living Association

California Association of Health Facilities


J.D., University of California, Berkeley Boalt Hall School of Law (1995)

B.A., summa cum laude, Rice University (1986)

Admissions And Courts


U.S. District Court for the Northern District of California

U.S. District Court for the Central District of California

U.S. District Court for the Eastern District of California

U.S. Court of Appeals for the Ninth Circuit

San Francisco

415-995-5088 Direct Phone
415-995-3432 Fax

Email Attorney


Firm Leadership

Chair, Partner Evaluation Committee