Anna Marrison


[email protected]

Anna advocates for health care clients and their staff in complex civil claims and administrative matters.

Anna provides advice on a wide range of health law-related issues, including:

  • uninsured/private health services
  • disclosure obligations
  • the release of personal health information to third parties
  • regulatory college proceedings and litigation
  • legal issues relating to telehealth

Anna has acted as lead counsel before all levels of courts in Ontario and the Supreme Court of Canada, and has appeared before administrative tribunals, including:

  • Coroner’s Inquests
  • the Health Professionals Appeal and Review Board (on physician privileging disputes and regulatory college appeals)
  • regulatory colleges
  • the Consent and Capacity Board


  • Advocates for hospitals, public and private health care clinics, pharmaceutical clients, municipalities, and health care providers in medical malpractice and other civil litigation, including class actions.
  • Assists health care clients with review and drafting of policies and guidelines and advises on regulatory compliance.
  • Acted for intervenor at SCC in Armstrong v. Ward, 2021
  • Successfully represented a hospital respond to an application for judicial review related to its COVID-19 visitor's policy 2020 ONSC 2335 (CanLII; Div Court).
  • Successfully represented a hospital at a jury trial arising from a stroke Doobay v. Fu, 2019.
  • Successfully represented a hospital and its nursing staff at a jury trial arising from postoperative infections Sacks v. Ross, 2015; lead counsel at Court of Appeal (appeal dismissed; leave to SCC denied) Sacks v. Ross, 2017 ONCA 773 (CanLII) — 2017-10-05.

Beyond Our Walls

Professional Involvement

  • Member, Canadian Bar Association
  • Member, Ontario Bar Association, Health Law Section
  • Member, The Advocates' Society
  • Member, Medico-Legal Society of Toronto

Community Involvement

  • BLG Give-A-Day (to World AIDS)
  • Cycle 4 St. Joe's
  • Pia Bouman Ballet School
  • UofT Mentorship Program
  • Chair, BLG Toronto Pro Bono Committee
  • Member, BLG National Pro Bono Committee

Awards & Recognitions

  • Recognized in the 2024 edition (and since 2018) of The Best Lawyers in Canada® (Health Care Law, Medical Negligence).
  • Recognized in the 2024 edition (and since 2017) of The Canadian Legal Lexpert® Directory (Medical Negligence - Represents Defendants) and in the 2024 edition (Personal Injury).
  • Recognized in the 2024 (and since 2019) edition of Benchmark Canada - The Definitive Guide to Canada's Leading Litigation Firms & Attorneys as a Future Star.
  • Recognized in the 2021 edition of Lexpert Special Edition: Health Sciences.

Bar Admission & Education

  • Ontario, 2003
  • LLB, University of Toronto, 2002
  • BA(Hons.) in English, McGill University, 1995