Anna Marrison



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 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.
  • 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 2020 edition of The Canadian Legal Lexpert® Directory (Personal Injury) and the 2022, 2020, 2019 and 2017 editions (Medical Negligence).
  • Recognized in the 2022 (and since 2019) edition of Benchmark Canada - The Definitive Guide to Canada's Leading Litigation Firms & Attorneys as a Future Star.
  • Recognized in the 2022 edition (and since 2018) of The Best Lawyers in Canada® (Health Care Law, Medical Negligence).
  • Recognized in the 2021 edition of Lexpert Special Edition: Health Sciences.
  • Recognized in the 2020 edition of The Canadian Legal Lexpert® Directory (Personal Injury) and the 2020, 2019 and 2017 editions (Medical Negligence).

Bar Admission & Education

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