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Malpractice Center

Best Medical Malpractice Lawyers in London, ON (2026)

This 2026 list weighs the evidence on medical malpractice lawyers for readers in London. The rankings give weight to results and the work each firm focuses on. We also weigh reviews and experience.

Sources checked

5 lawyers and firms

London, Ontario skyline in 2017
Photo: Mcalpinestudios, CC BY-SA 4.0, via Wikimedia Commons

The short answer

Our featured firm in London is Diamond & Diamond Lawyers LLP, where Jeremy Syrtash leads the medical malpractice group. Among the firms we reviewed, Brown Beattie O'Donovan LLP stands out because of its long history and client feedback. That position isn't backed by published malpractice results. Before you call, check which lawyer handles the firm's medical negligence claims. Whether the firm can act in Ontario needs checking too. Discuss fees first. You can then read the Ontario claim rules.

At a glance

  1. 1Diamond & Diamond Lawyers LLPJeremy SyrtashFeatured
  2. 2Brown Beattie O'Donovan LLPFree consultation4.5 out of 5
  3. 3Fosters Law LLPFree consultation4.8 out of 5
  4. 4Lemer & CompanyNo rating
  5. 5Cohen Highley LLPFree consultation3.6 out of 5

Best Medical Malpractice Lawyers in London

  1. Featured
  2. 2

    Brown Beattie O'Donovan LLP

    4.5115 Google reviewsRated 4.5 out of 5 on Google from 115 reviews

    Best for: Established London firm

    Brown Beattie O'Donovan LLP's history goes back to 1950. Its 115 Google reviews give you client accounts to read. Prompt replies earn frequent praise from clients, as do the firm's explanations.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for its years of experience and what its clients say.

    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. Fosters Law LLP logo3

    Fosters Law LLP

    4.823 Google reviewsRated 4.8 out of 5 on Google from 23 reviews

    Best for: Injury and insurance-related claims

    Medical malpractice appears expressly among Fosters Law LLP's practice areas, alongside professional malpractice and insurance coverage disputes. If you're calling about medical care, that gives you more to go on than a personal injury listing alone. The London firm's history begins in 1975.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for its years of experience and what its clients say.

    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. Not sure who to call first?

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  5. Lemer & Company logo4

    Lemer & Company

    Best for: Claims involving diagnostic or surgical errors

    Lemer & Company's profile points to one clear malpractice result: a $1.513 million verdict in Reyes v. Marsden. The British Columbia Supreme Court result appears on the firm's own site. Misdiagnosis claims are part of the work its site describes.

    WebsiteFree case reviewIs 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

  6. Cohen Highley LLP logo5

    Cohen Highley LLP

    3.698 Google reviewsRated 3.6 out of 5 on Google from 98 reviews

    Best for: Misdiagnosis and surgical-error enquiries

    Cohen Highley LLP's client feedback is divided. Some reviewers praise the clear explanations; they also describe caring service. Communication and accuracy draw concerns from other reviewers.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for its years of experience.

    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

Where they are in London

What clients say about these London lawyers

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.

  • Ahasan C.

    December 2025 · London, Ontario

    “⭐⭐⭐⭐⭐ I had an excellent experience with Abhimanyu for a law matter. He is professional, knowledgeable, and very responsive. He explained everything clearly, provided practical advice, and handled the case with care and integrity. I felt well-supported throughout the process and would highly recommend him to anyone...”

    About Cohen Highley LLPGoogle reviewRead it on Google

  • Tyrone S.

    April 2024 · London, Ontario

    “In my opinion, anyone that gets a 5 star rating that goes way beyond to make sure you receive the best experience ever, deserves to get that! That's what the people at Fosters did for me! Right from the first person I spoke to, to the very last! Everyone that helped me with my personal injury claim was sympathetic...”

    About Fosters Law LLPGoogle reviewRead it on Google

  • S. K.

    April 2026 · London, Ontario

    “I am deeply grateful to Mr. Iain D. Sneddon, Melissa Russell, Wendy Miller, Cacee Counter, and the entire team for the exceptional support they provided to me and my family. I have known Mr. Sneddon since 2017. After a long and difficult journey, I returned to him for guidance, and I am truly thankful that I did...”

    About Brown Beattie O'Donovan LLPGoogle reviewRead it on Google
See all reviews
How a malpractice claim usually moves in Ontario

  1. 1.Something went wrong

    Write down dates and names while they're fresh.

  2. 2.Get your records

    Ask for your full chart and test results.

  3. 3.Free case review

    A lawyer looks at what happened, free.

  4. 4.Medical opinion

    A doctor checks whether the care fell short.

  5. 5.Start the claim in time

    Your lawyer starts the claim before the deadline.

  6. 6.Settlement or trial

    Many claims settle. Some go to a judge or jury.

Your deadline: 2 years from when you found outRead the Ontario law guide

Malpractice claims in London: the rules that matter

The filing deadline in Ontario
  1. The clock startsWhen you found out, or should have
  2. Time to start a claim2 yearsMiss it and the claim is usually lost.
  3. At the very most15 yearsafter the treatment, with a few exceptions
Limits on damages in Ontario
  • Pain and sufferingCapped at about $484,330
  • All damages togetherNo overall cap
  • Expert paperworkNo affidavit or certificate of merit is required to start a claim.

Read the Ontario law guideWork out your own deadline

Basic limitation period in Ontario
2 years
Source
Ultimate limitation period
15 years
Source

Choosing a malpractice lawyer in London

Your claim comes first. A property transaction review tells you nothing about how the lawyer handles a disputed diagnosis, whatever rating the reviewer gives. On this list, the sole firm with a published malpractice result is Lemer & Company. Medical malpractice isn't the only work several of these firms do. You'll want to ask about claims the lawyer has handled involving that treatment.

Use the first conversation to check fit

  1. Describe the treatment and timing

    You'll need your treatment dates. The lawyer needs to know when you first connected the care with your injury. You'll also need to ask which records to bring (for example, the chart or delivery notes). The treatment date alone doesn't necessarily settle your deadline.

  2. Identify the lawyer doing the work

    You'll need to know who assesses your claim. Who answers your calls is another point to clarify. You'll need to confirm that Lemer & Company's Vancouver office can act on an Ontario claim before approaching it about representation. Diamond & Diamond Lawyers LLP also lists its offices outside London. Ask how you'd meet and arrange representation.

  3. Discuss proof before expectations

    You don't need an affidavit or certificate of merit to start an Ontario claim. Expert reports must still be served under the court's rules. They must address the standard of care and causation. For your case, have the lawyer explain how they'd address those issues.

Get the fee terms in writing

At a free consultation, you're having an initial discussion. The firm may still decide not to take your case. Free consultations and contingency fees are listed by Brown Beattie O'Donovan LLP and Fosters Law LLP. Diamond & Diamond Lawyers LLP and MD Lawyers - London Office list those arrangements too. Cohen Highley LLP lists a free consultation. You'll need to confirm Lemer & Company's consultation and fee arrangements.

With a contingency arrangement, you'll want to know how the outcome affects payment. Ask for the fee calculation in writing, including expenses such as expert reports. If the claim doesn't succeed, you'll need the lawyer to explain what you could owe. A free meeting doesn't establish what those terms are.

Treat any promise of a particular recovery as a warning. A firm should clearly identify who handles the file. Be wary if it won't do that or say when it'll respond. This gives you general information; it isn't legal advice. Mention a possibly approaching deadline when you first contact the firm.

Questions people ask

Which firm leads this London malpractice lawyer list?
Brown Beattie O'Donovan LLP ranks first on the strength of its history since 1950 and client feedback that often praises communication. First place doesn't establish that its malpractice results are strongest. It handles several areas. There's no published malpractice result behind that position. Before choosing the firm, find out who handles medical negligence and whether they've handled claims involving the treatment that concerns you.
How long do I have to start a medical malpractice claim in Ontario?
From discovery, you generally have two years under the basic limitation period. It doesn't automatically start at treatment. For discovery, what matters includes when you knew, or reasonably should have known, about your injury and that a health care provider contributed to it. Knowing that a lawsuit was appropriate also forms part of discovery. Ontario has a 15-year ultimate period, too. Don't wait for certainty before asking an Ontario lawyer. They can assess the dates and whether any suspension applies.
Does the two-year deadline apply to an injured child?
The two-year period doesn't run for a claimant under 18 who has no litigation guardian for the claim. For a claim arising while the claimant is a minor without a litigation guardian, the 15-year ultimate period is also suspended, a point addressed in Wong v. Lui, 2023 ONCA 272. Age alone won't tell you the deadline. Ask an Ontario lawyer how the child's circumstances affect it.
Do I need an expert report before starting an Ontario claim?
Starting a medical malpractice claim in Ontario doesn't require you to have an affidavit or certificate of merit. The court's rules do require service of expert reports. Those reports must address the standard of care and causation. Ask at a consultation how the lawyer would assess those questions, and what obtaining the reports would cost. For the steps your claim requires, speak with a lawyer in Ontario.
Are medical malpractice damages capped in Ontario?
There's no statutory cap on economic losses (lost income or future care, for example). Non-pecuniary damages have a judge-made national trilogy cap. Your claim's value can't be determined from these rules alone. Nor can you predict your outcome from a firm's past verdict. For the injuries you're describing, ask an Ontario lawyer how economic losses differ from non-pecuniary losses and how that distinction applies.

Sources

  1. Limitations Act, 2002, S.O. 2002, c. 24, Sched. B, Government of Ontario (e-Laws)
  2. Claims from minors and the 15-year ultimate limitation period in Ontario, Borden Ladner Gervais LLP
  3. Non-Pecuniary Damages Upper Limits (monthly indexed figures, 2024 to 2026), McKellar Structured Settlements
  4. Key Numbers for 2025 (trilogy cap and indexation), McCague Borlack LLP
  5. Malpractice Center methodology, Malpractice Center

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