Best Surgical Error Lawyers in Ontario (2026)

The surgical error lawyers in Ontario we'd call first, drawn from every city list we've published there and the firms whose own work shows these cases.

Sources checked November 7, 2026

5 lawyers and firms

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Our featured firm in Ontario is Diamond & Diamond Lawyers LLP. Diamond & Diamond Lawyers LLP is our featured partner in Ontario and is listed first. Of the 11 firms that show surgical error work on our 13 city lists in Ontario, Paul Cahill scores highest on malpractice focus, published results, client reviews and experience, followed by Sommers Roth & Elmaleh and Gluckstein LLP. Each firm keeps its best score from the cities it serves; open a city for its full list.

Best Surgical Error Lawyers in Ontario

Featured
1
Diamond & Diamond Lawyers LLP
Jeremy Syrtash
Jeremy Syrtash leads the medical malpractice litigation practice at Diamond & Diamond Lawyers LLP. He earned a BA from Yeshiva University (2010) and a JD from the University of Ottawa (2013), was called to the Bar of Ontario in 2014, and has acted as counsel and co-counsel in medical malpractice cases across Canada, many involving pediatric and obstetrical negligence.
Called to the Bar of Ontario, 2014 · JD, University of Ottawa · Best Lawyers: Ones to Watch in Canada, Health Care Law (2024 to 2027)
Free case review 1-800-567-HURT Website
2
Paul Cahill
4.816 Google reviewsRated 4.8 out of 5 on Google from 16 reviews
Best for: Medical negligence-focused representation
Paul Cahill - Medical Malpractice Lawyer does much of its work on medical negligence claims. The firm's site lists surgical error claims, which is part of why it comes first here.
On our lists for Toronto, Mississauga, Brampton and Markham.
Call Website Free case review Is this your firm?
How they were picked
We order firms by how much of their work is medical malpractice, the results they publish, what their clients say, their experience, their standing with the regulator and the recognition they have earned, all from public records and the firms' own sites. How lists are made
3
Sommers Roth & Elmaleh
Best for: Delivery-related injury claims
Injuries during pregnancy and delivery account for most of Sommers Roth & Elmaleh's published results.
On our list for Mississauga.
Website Free case review Is this your firm?
How they were picked
We order firms by how much of their work is medical malpractice, the results they publish, what their clients say, their experience, their standing with the regulator and the recognition they have earned, all from public records and the firms' own sites. How lists are made
4
Gluckstein LLP
4.637 Google reviewsRated 4.6 out of 5 on Google from 37 reviews
Best for: An established injury litigation team
Gluckstein Lawyers dates back to 1962, when the firm was founded. The firm's site lists surgical errors among other medical negligence claims; managing partner Charles E.
On our lists for Toronto, Mississauga, Brampton and Ottawa.
Call Website Free case review Is this your firm?
How they were picked
We order firms by how much of their work is medical malpractice, the results they publish, what their clients say, their experience, their standing with the regulator and the recognition they have earned, all from public records and the firms' own sites. How lists are made
5
Thomson Rogers LLP
4.8300 Google reviewsRated 4.8 out of 5 on Google from 300 reviews
Best for: Claims needing appellate litigation experience
Thomson Rogers LLP's site says its win in the medical malpractice case Denman v. Radovanovic, 2024 ONCA 276 held up on appeal. You can discuss that named result at intake, though it isn't identified as a surgical error case.
On our lists for Toronto, Mississauga, Brampton and Markham.
Call Website Free case review Is this your firm?
How they were picked
We order firms by how much of their work is medical malpractice, the results they publish, what their clients say, their experience, their standing with the regulator and the recognition they have earned, all from public records and the firms' own sites. How lists are made

What clients say about surgical error lawyers in Ontario

Google reviews of the firms on our lists, quoted as their clients wrote them and linked to where they were posted. We don't write, edit or pick reviews for pay.

Chris F.
November 2026 · Hamilton, Ontario
“We enjoyed working with Chris Harrison for the purchase of our property. He brings a strong work ethic to his job and presents information with clarity. We would strongly recommend him to anyone needing a lawyer to purchase or close a property. We have also used him for Wills. His knowledge and understanding of...”
About Martin & Hillyer AssociatesGoogle reviewRead it on Google
Kate I.
July 2026 · Toronto, Ontario
“⭐⭐⭐⭐⭐ I cannot recommend Jennifer Ilton and Yoni Silberman of Bogoroch & Associates LLP highly enough. After our serious motor vehicle collision on Highway 400 North in November 2023, they stood by us every step of the way. They fought diligently to protect our insurance rights while also providing something just...”
About Bogoroch & Associates LLPGoogle reviewRead it on Google
MICKE C.
October 2026 · Toronto, Ontario
“Thanks so much DARCY, I TRULY DO APPRECIATE EVERYTHING TRL HAS ACCOMPLISHED FROM THE INFANCY STAGE AS THEIR CLIENT AND EVERY DAY THEREAFTER. IIN REFERRENCE TO THE THEREAFTER STAGE AS THEIR CLIENT I HAD SEVERAL CONVERSATIONS WITH BOTH LAWYERS DARCY M. & HIS PARTNER MICHAEL B. OF WHICH WERE ALL PROFESSIONAL, POSITIVE...”
About Thomson Rogers LLPGoogle reviewRead it on Google

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How a malpractice claim usually moves in Ontario

1.Something went wrong
Write down dates and names while they're fresh.
2.Get your records
Ask for your full chart and test results.
3.Free case review
A lawyer looks at what happened, free.
4.Medical opinion
A doctor checks whether the care fell short.
5.Start the claim in time
Your lawyer starts the claim before the deadline.
6.Settlement or trial
Many claims settle. Some go to a judge or jury.

Surgical Error Lawyers by city in Ontario

Photos: Toronto, Dillan Payne, CC BY-SA 4.0; Ottawa, No machine-readable author provided. Arctic.gnome assumed (based on copyright cl, CC BY 2.5; Mississauga, The Eloquent Peasant, CC BY 4.0; Brampton, Peter K Burian, CC BY-SA 4.0; Hamilton, AI-generated image; London, Mcalpinestudios, CC BY-SA 4.0; Markham, Mhsheikholeslami, CC BY-SA 4.0; Vaughan, Dillan Payne, CC BY-SA 4.0; Oakville, Canmenwalker, CC BY 4.0; Richmond Hill, Raysonho @ Open Grid Scheduler / Scalable Grid Engine, CC0. Via Wikimedia Commons.

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