About Rosen Sunshine LLP

Rosen Sunshine LLP is a Toronto law firm focused on health and regulatory law. Founding partners Lonny Rosen and Elyse Sunshine set up the firm in 2011 after practicing law together since 1999, first at a small health law firm and then at a mid sized, full service firm. The firm now has five lawyers working out of an office on Adelaide Street West in downtown Toronto.

The practice is organized around four kinds of clients: regulated health professionals facing a complaint or discipline proceeding, healthcare providers such as community health clinics and mental health and addiction rehabilitation programs, organizations and associations that need policy and compliance advice, and the regulators themselves. That last piece is less common. Rosen Sunshine lawyers act as amicus curiae, or friend of the tribunal, in hearings where a registrant represents themself without counsel, and they advise regulatory colleges and their committees on the law that governs the colleges' own processes. Lonny Rosen is a Law Society of Ontario Certified Specialist in Health Law and teaches health law as an adjunct professor at Osgoode Hall Law School.

Milestones & recognition

  • The firm was founded in 2011 by Lonny Rosen and Elyse Sunshine, who had already practiced law together since 1999.
  • Lonny Rosen was named the inaugural recipient of the Ontario Bar Association's Susan Hilary Davidson Memorial Award for Excellence in Health Law in 2016.
  • Lonny Rosen has been listed in Best Lawyers in Canada for Health Care Law every year since 2014, and Elyse Sunshine every year since 2015.
  • Lonny Rosen served for ten years as a Senior Lawyer Member (adjudicator) of the Consent and Capacity Board and was a Director of The Advocates' Society from 2014 to 2018.

In the community

  • Elyse Sunshine is a founding Board Member of the David Cornfield Melanoma Fund and has taken part in melanoma awareness projects, including the video 'Dear 16 Year Old Me' and the #besunsafe Toronto sunscreen dispenser program.
  • Lonny Rosen chairs the Health Law Sections of both the Ontario Bar Association and the Canadian Bar Association, and serves as a council member and program chair with the Medico-Legal Society of Toronto.

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

The neighbourhood

Rosen Sunshine's office is at 212 Adelaide Street West in downtown Toronto. Because most of the firm's work happens in hearings before regulatory colleges, tribunals, and boards rather than in a single local courtroom, the address works more as a base for a province wide practice than a typical neighbourhood law office. The firm's clients, mostly regulated health professionals and the colleges and organizations that oversee them, are spread across Ontario rather than concentrated near Adelaide Street.

Frequently asked questions

Does Rosen Sunshine represent individual health professionals facing a complaint at their regulatory college?
Yes. The firm represents professionals in complaint and discipline proceedings before health regulatory colleges, including the College of Chiropractors of Ontario, the Royal College of Dental Surgeons of Ontario, the College of Audiologists and Speech-Language Pathologists of Ontario, and others, and in related appeals.
Does Rosen Sunshine only work with individual professionals, or also with clinics and organizations?
Both. The firm advises healthcare providers such as community health clinics and mental health and addiction rehabilitation programs on employment, privacy, and regulatory compliance, and it advises professional associations and advocacy organizations on the rules that govern how they operate.
Can a regulatory college or tribunal retain Rosen Sunshine directly?
Yes. Part of the firm's practice is acting for regulators themselves, including as amicus curiae (friend of the tribunal) in hearings where a registrant represents themself, and advising committees and tribunals on the law that applies to their own proceedings.
How long has Rosen Sunshine been practicing health and regulatory law?
The firm was founded in 2011 by Lonny Rosen and Elyse Sunshine, who had already worked together in health and regulatory law since 1999.
Does the firm handle privacy and PHIPA compliance for healthcare organizations?
For healthcare provider clients such as clinics and facilities, yes. That work includes privacy law compliance and PHIPA audits alongside employment, governance, and regulatory advice.
Where is Rosen Sunshine's office and can meetings happen virtually?
The office is at 212 Adelaide Street West, Suite 200, in downtown Toronto, and the firm meets with clients both in person and virtually.

Where to find them

212 Adelaide Street West, Suite 200, Toronto, ON M5H 1W7 · 416-223-4222

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Listing compiled from the firm’s public website in August 2026. Verify licence status in the Law Society of Ontario directory ↗