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Malpractice Center

Best Medical Malpractice Lawyers in Markham, ON (2026)

We weigh medical malpractice lawyers' published results alongside their practice focus in this evidence-based 2026 Markham list. Client reviews count here, too.

Sources checked

5 lawyers and firms

Markham Village Heritage Conservation District in Markham, Ontario
Photo: Mhsheikholeslami, CC BY-SA 4.0, via Wikimedia Commons

The short answer

Our featured firm in Markham is Diamond & Diamond Lawyers LLP, where Jeremy Syrtash leads the medical malpractice group. This list puts Neinstein Personal Injury Lawyers first. Among its published medical negligence results is a $22 million result for a minor who experienced septic shock. Find out who'd handle your claim before you call. Have the firm explain its fees, then check when Ontario's limitation period would expire for your claim. Read the Ontario malpractice guide for the regional rules.

At a glance

  1. 1Diamond & Diamond Lawyers LLPJeremy SyrtashFeatured
  2. 2Neinstein Personal Injury LawyersFree consultation4.8 out of 5
  3. 3Paul Cahill4.8 out of 5
  4. 4Campisi LawFree consultation4.9 out of 5
  5. 5Thomson Rogers LLPFree consultation4.8 out of 5

Best Medical Malpractice Lawyers in Markham

  1. Featured
  2. Neinstein Personal Injury Lawyers logo2

    Neinstein Personal Injury Lawyers

    4.8592 Google reviewsRated 4.8 out of 5 on Google from 592 reviews

    Best for: Serious brain and birth injuries

    Neinstein Personal Injury Lawyers has published a $22 million medical negligence result for a minor with septic shock, as well as a $14 million birth injury result. Those results help explain why it leads here. When discussing hypoxic ischemic encephalopathy (HIE) and cerebral palsy, the firm's site also points to several published brain injury results.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for the results it publishes and the recognition it has earned.

    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. Paul Cahill logo3

    Paul Cahill

    4.816 Google reviewsRated 4.8 out of 5 on Google from 16 reviews

    Best for: Birth injury and diagnostic claims

    Paul Cahill - Medical Malpractice Lawyer reports an $11.5 million jury verdict for a child born with cerebral palsy. Partner Paul Cahill's listed work includes a successful trial against an emergency room physician. It involved a mother's death.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for the recognition it has earned and how much of its work is medical malpractice.

    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?

    Tell us what happened. A malpractice lawyer who serves Markham can look at it with you, and it costs nothing.

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  5. Campisi Law logo4

    Campisi Law

    4.9370 Google reviewsRated 4.9 out of 5 on Google from 370 reviews

    Best for: Families seeking supportive injury representation

    Campisi Law Injury Lawyers clients repeatedly describe feeling supported, with the firm keeping them informed. With 370 Google reviews, there's plenty of feedback about that service, although clients don't always agree about communication. Managing partner Joseph Campisi leads it.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for the recognition it has earned 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

  6. Thomson Rogers LLP logo5

    Thomson Rogers LLP

    4.8300 Google reviewsRated 4.8 out of 5 on Google from 300 reviews

    Best for: Claims needing trial experience

    If you're considering Thomson Rogers LLP, its medical malpractice judgment upheld on appeal is the clearest reason. The firm's site identifies Denman v. Radovanovic, 2024 ONCA 276 as a lawsuit its legal team successfully handled. The firm dates to 1935.

    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

Where they are in Markham

What clients say about these Markham 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.

  • Joanna C.

    October 2026 · Markham, Ontario

    “I can’t say enough good things about Dana! From the beginning, she has been kind, empathetic, and incredibly clear in her communication. I never feel like I’m left in the dark or unsure of what’s happening with my case, which has made such a difference throughout the entire process. Navigating an accident benefits...”

    About Reyes Tam LawGoogle reviewRead it on Google

  • Ashley F.

    October 2026 · Markham, Ontario

    “A M A Z I N G injury law firm!! Seriously, I was so discouraged on the outcome of my case but they just kept motivating me to persevere. The amount of support, dedication and encouragement I recieved from the team throughout the process truly made me feel seen and cared for; like I was family and they wouldn't rest...”

    About Campisi LawGoogle reviewRead it on Google

  • Kate I.

    July 2026 · Markham, 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
See all reviews

A few minutes that might help

Questions about your own case?
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

Each step in more detail

  1. First call

    When you tell the lawyer what happened, explain when you first suspected the care caused harm. Ontario's basic limitation period runs for two years from discovery, including knowing that a lawsuit was appropriate. To understand how that rule applies, ask an Ontario lawyer.

  2. Review the records

    If you have delivery or surgical notes, bring them with the chart. To help the lawyer assess the care, ask what else they need. Because appointing a litigation guardian affects whether the limitation periods run for a child, discuss whether one has been appointed if the claim involves a child.

  3. Start the claim

    Before suing doctors, nurses or hospitals in Ontario, you don't need to give them pre-suit notice. To start the claim, you don't need an affidavit or certificate of merit. Ask what the statement of claim says about the allegations; the lawyer can explain that document.

  4. Serve medical reports

    To meet the court's rules, expert reports on the standard of care and causation must be served. By explaining the expected care, those reports address whether a departure from it caused the injury. Before the lawyer gets those reports, ask how and who pays.

Malpractice claims in Markham: 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

What a malpractice lawyer costs in Markham

  1. The first callOften free. Ask before you book.
  2. A written agreementThe share the lawyer takes, set out before work starts.
  3. If you recover moneyThe agreed share and the case costs come out of it.
  4. If the claim failsNo legal fee on a contingency agreement. Ask about costs.
Several firms on this list charge a contingency fee, taking a share of what's recovered; you won't pay a legal fee if the claim fails. Case costs aren't included. Those costs can cover medical records and medical opinions; court fees may be included too. Before signing, find out who advances those costs, including whether you'll owe them if nothing is recovered. Don't count on that coverage. Ask the lawyer to show you how they'd calculate the final bill, including their share and any other deductions. Ask for those terms in writing.

Seven of the eight firms describe their consultations as free. Six say their fees are contingency-based.

What to bring to your first call

  • Your chart and test results, with any other medical records you already have
  • Delivery or surgical notes, if they're relevant
  • When you received treatment, with dates, and when you first suspected something was wrong
  • Which hospitals were involved, along with the names of the doctors and nurses
  • Injury-related expenses shown in your bills and receipts
  • Letters you've received from the hospital or insurer
  • The injury shown in photos, including changes to it over time
  • What happened, briefly set out in your own words

Questions to ask a lawyer

  1. 1When you've handled claims, have any involved the kind of care that harmed my family member?
  2. 2If we hire you, who handles our file and talks with us?
  3. 3For our claim, what is the applicable limitation period?
  4. 4Before you decide whether to take the case, what records should we provide?
  5. 5To get the medical opinions this claim needs, what will you do?
  6. 6When calculating your contingency fee, what method do you use?
  7. 7If we recover nothing, who pays case costs?
  8. 8Before you advise us to proceed, what would you need to find out?

Choosing a malpractice lawyer for a Markham claim

When choosing a firm, start with the medical error you suspect, not its overall reputation. Discussing birth injury isn't the same as discussing delayed diagnosis. Ask what the lawyer would need to assess your claim, then how they've handled work involving the same kind of treatment. Don't count a published accident recovery as a malpractice result.

Use the first conversation well

  1. Ask who will handle the file

    Find out which lawyer would review your chart, then ask their name and how they'd talk through the claim with you. Ask how often you'd hear from the firm, including who would answer your questions between meetings. People praise several firms here for their communication. Missed replies or delays also appear in some reviews.

  2. Discuss the medical review

    Ontario doesn't require an affidavit or certificate of merit before you start a claim. In practice, the court's rules require you to serve expert reports on the standard of care and causation. Find out how the firm would assess both issues. Ask which records the firm wants, including delivery notes if you're making a birth injury enquiry.

  3. Clarify costs before signing

    You'll find free consultations and contingency fees at several listed firms. Before anything else, ask what that free consultation covers. If a contingency arrangement interests you, ask the lawyer what payment depends on and how they'll work out the fee. Find out whether you'd owe other expenses, too. Not every firm uses the same terms, so check.

If the claim is a child's, look separately at its deadline. Until the child reaches 18, the two-year period doesn't run if there's no litigation guardian for the claim. If the claim arises while the claimant is a minor without a litigation guardian, the ultimate period is also suspended. Wong v. Lui, 2023 ONCA 272 explains how that works.

Treat any promise of a particular recovery as a red flag. If nobody can explain who'd be responsible for your file, ask for clarification, just as you should if the fees are still vague. You won't find most listed offices inside Markham. Ask about meeting arrangements. An Ontario lawyer can assess your situation; what's here is general information, not legal advice.

Questions people ask

Do I need a lawyer with an office in Markham?
You'll find a Markham office at Reyes Tam Law. You'll find other listed offices in Toronto or North York, with another office in Woodbridge. Before choosing, ask who'd handle your claim and how meetings would work, since listed distances from Markham range from 12 to 26 km. An office's location alone won't show whether they've handled the medical issue involved.
How long do I have to start a medical malpractice claim in Ontario?
Discovery starts the basic limitation period of two years. Don't count a fixed two years from treatment. Discovery requires that you know, or reasonably be expected to know, about the injury and the provider's contribution. You must meet that same test for knowing whether a lawsuit was appropriate. Because Ontario also has a 15-year ultimate period, ask an Ontario lawyer how both periods apply to your circumstances.
Does the same deadline apply to a child's birth injury claim?
If the claimant is under 18 without a litigation guardian for the claim, Ontario's two-year clock doesn't run. If a claim arises while the claimant is a minor without a litigation guardian, the 15-year ultimate period is also suspended. Wong v. Lui, 2023 ONCA 272 explains how that works. An Ontario lawyer can explain how it applies to the child's circumstances.
Do I need an expert report before starting a claim?
In Ontario, starting a medical malpractice claim doesn't require an affidavit or certificate of merit. But expert reports work differently. In practice, the court's rules require you to serve reports on the standard of care and causation. Have the firm explain how it'd review your chart and arrange that assessment; ask an Ontario lawyer what your claim requires.
Is there a cap on medical malpractice compensation in Ontario?
If you're claiming economic losses, such as lost income or future care, Ontario has no statutory cap. The national judge-made trilogy cap does limit non-pecuniary damages, so those work differently. Don't use published results from Neinstein Personal Injury Lawyers or Paul Cahill - Medical Malpractice Lawyer to predict what another claim is worth. Have an Ontario lawyer explain how the damages rules fit your losses.
Can I have a free consultation before deciding whether to hire a lawyer?
Seven firms on this list say they offer a free consultation, including Neinstein Personal Injury Lawyers and Campisi Law Injury Lawyers. Paul Cahill's consultation terms haven't been confirmed, so ask before booking. Later work is a separate matter. Request the proposed fee agreement before you decide; a free consultation doesn't tell you what that work will cost.
Do all the firms on this list offer contingency fees?
Six firms describe their fees as contingency-based. Because fee arrangements haven't been confirmed for Thomson Rogers LLP or Paul Cahill, ask them directly; don't assume they work on contingency or rule it out. If the claim fails under a contingency arrangement, you won't pay a legal fee; the lawyer's fee is a share of what's recovered. Ask who pays case costs, since those aren't included.
Must I notify the hospital before starting a lawsuit?
If you're bringing a medical malpractice claim against a hospital, doctor or nurse, Ontario doesn't require pre-suit notice. For those claims, you can sue without first sending a formal notice. You'll still have a filing deadline. To find out what you must file and how the rules apply to you, ask an Ontario lawyer. Don't treat this general information as legal advice.
Which firms list misdiagnosis among the claims they handle?
If you're looking at misdiagnosis claims, Paul Cahill and Thomson Rogers LLP list them among their practice areas; Bergel Magence LLP and Bogoroch & Associates LLP do too. You'll also find misdiagnosis listed by Reyes Tam Law and Diamond & Diamond Lawyers LLP. Use those listings to start your call. When you call, ask about claims involving the diagnosis and treatment that your family member's care involved.

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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