Skip to content
Malpractice Center

Best Misdiagnosis Lawyers in Mississauga, ON (2026)

This evidence-based 2026 list lets you compare misdiagnosis lawyers serving Mississauga. You'll compare what firms handle and their published results, using client reviews and experience.

Sources checked

5 lawyers and firms

Skyline of Mississauga
Photo: The Eloquent Peasant, CC BY 4.0, via Wikimedia Commons

The short answer

Our featured firm in Mississauga is Diamond & Diamond Lawyers LLP, where Jeremy Syrtash leads the medical malpractice group. Paul Cahill - Medical Malpractice Lawyer focuses on medical negligence; its published trial results help put it first here. Find out who would handle your delayed diagnosis claim before you call. Ask whether the firm can review your deadline promptly, and how it assesses causation. See the Ontario malpractice guide for the province's claim rules.

At a glance

  1. 1Diamond & Diamond Lawyers LLPJeremy SyrtashFeatured
  2. 2Paul Cahill4.8 out of 5
  3. 3Sommers Roth & ElmalehFree consultationNo rating
  4. 4Gluckstein LLPFree consultation4.8 out of 5
  5. 5Thomson Rogers LLPFree consultation4.8 out of 5

Best Misdiagnosis Lawyers in Mississauga

  1. Featured
  2. Paul Cahill logo2

    Paul Cahill

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

    Best for: Medical negligence trial experience

    Paul Cahill - Medical Malpractice Lawyer's record rests on a published birth injury jury verdict of $11.5 million. It reports a successful trial against an emergency room physician, a case involving the death of a 34-year-old mother of four. It leads on those results and its strong medical negligence focus, with its site also addressing misdiagnosis.

    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

  3. Sommers Roth & Elmaleh logo3

    Sommers Roth & Elmaleh

    Best for: Missed diagnoses during pregnancy

    The result Sommers Roth & Elmaleh publishes directly concerns missed diagnosis. After a family physician failed to provide conventional pregnancy screening and monitoring, it reports over $6 million over a lifetime. When an obstetrician ignored a diagnosis of pre-eclampsia, another published recovery exceeded $7.1 million.

    WebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for how much of its work is medical malpractice and the results it publishes.

    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 Mississauga can look at it with you, and it costs nothing.

    Free and private, never used for ads

  5. Gluckstein LLP logo4

    Gluckstein LLP

    4.8168 Google reviewsRated 4.8 out of 5 on Google from 168 reviews

    Best for: Long-established injury litigation team

    Gluckstein Lawyers has a long history, having operated since 1962. Managing partner Charles E. Gluckstein serves on the team with senior counsel Richard Halpern. You'll find birth injury and surgical errors on its site alongside misdiagnosis.

    CallWebsiteFree case reviewIs this your firm?
    How they were picked

    Stood out in our review for its years of experience 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

  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 litigation experience

    Thomson Rogers LLP reports its medical malpractice success in Denman v. Radovanovic, 2024 ONCA 276 was upheld on appeal. You can point to that court result. It doesn't count as a published recovery for misdiagnosis.

    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 Mississauga

What clients say about these Mississauga 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.

  • David K.

    November 2025 · Mississauga, Ontario

    “Jim Davidson and his team at his firm are very experienced and professional in what they do. They cut no corners and handled my case with professionalism. He put me at ease throughout the legal process and showed me consistent support through my case. I highly recommend Jim and his team at Davidson Cahill Morrison LLP.”

    About Davidson Cahill Morrison LLPGoogle reviewRead it on Google

  • Zoha

    July 2026 · Mississauga, Ontario

    “​I want to formally express my deepest gratitude to Michelle Kudlats and the team at Neinstein Personal Injury Lawyers for their incredible support. As a young pedestrian who survived a motor vehicle accident, I was terrified and dealing with a situation I had never faced before. I was frantic, confused, and had no...”

    About Neinstein LLPGoogle reviewRead it on Google

  • Shamickia F.

    October 2026 · Mississauga, Ontario

    “I had the absolute pleasure of working with Mrs. Veena Gupta and her wonderful team at Nanda & Associates throughout my refugee claim and permanent residency application process. Mrs. Gupta’s exceptional knowledge, professionalism, guidance, and dedication made my immigration journey so much easier. No matter what...”

    About Nanda & Associate LawyersGoogle 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. Check the deadline

    When you speak with the lawyer, explain when you learned of the injury and its possible link to your care. Discovery determines Ontario's two-year limitation period, including when it was appropriate to sue. Until a minor has a litigation guardian, the clock doesn't run.

  2. Review the records

    Bring a written timeline with your chart and test results. As you discuss what the provider did or missed, explain how it may have caused harm. To assess those issues, which medical opinions does the lawyer need?

  3. Start the claim

    Talk about filing within the applicable limitation period if you decide to proceed. Before suing doctors, nurses or hospitals in Ontario, you don't need pre-suit notice. Neither an affidavit nor a certificate of merit is needed to start the claim.

  4. Serve expert reports

    When the claim proceeds, the court's rules require you to serve expert reports addressing the standard of care and causation. Those reports explain what care was needed, then consider whether the alleged failure caused the injury. How will the lawyer get that work done?

Malpractice claims in Mississauga: 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 Mississauga

  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.
If you recover money, several listed firms take a share as their fee; if the claim fails, they charge no legal fee under their contingency arrangements. Case costs aren't included. Medical records and medical opinions may still cost you money, and court fees can apply too. Ask who advances those expenses before you sign, and who pays them if you recover nothing. You can't assume the firm pays. Ask how the lawyer's share is calculated and if you'll face any other charges. Although a free consultation lets you discuss the claim, you still need to check what the fee agreement says.

Six of the eight listed firms describe their consultations as free. Five offer contingency work, according to their listings.

What to bring to your first call

  • Test results and diagnostic reports, as part of your medical records
  • When your appointments and symptoms occurred, plus the date you received the eventual diagnosis
  • Which doctors and nurses were involved, with their names and the hospitals' names
  • What happened, set out in a written timeline with when you learned something had gone wrong
  • Records of income you lost after the injury, plus bills
  • What the hospital or insurer sent by letter or email
  • How the injury looks or affects you, shown in photos
  • The child's date of birth, with details of any litigation guardian if the claim is a child's

Questions to ask a lawyer

  1. 1When a diagnosis like this was missed, have you handled claims?
  2. 2Who would my family talk with, and who handles my file?
  3. 3How do you figure out which limitation period applies to my claim?
  4. 4Which medical opinions help you assess whether harm came from the missed diagnosis?
  5. 5Is a contingency agreement available, and what determines the share you take?
  6. 6If the claim fails, what would I owe, and who advances case expenses?
  7. 7As my claim moves forward, how will I hear from you?

Choosing a misdiagnosis lawyer in Mississauga

The missed diagnosis in your case is a better starting point than the firm's overall rating. What claims has the lawyer handled for your condition that involved a delay like yours? You can find published pregnancy-related missed diagnosis results at Sommers Roth & Elmaleh; other firms list neurological injuries or emergency room care among their areas. If a published result came from a different medical setting, it may tell you less about your own claim.

Find out who will assess the chart

  • Who would review your medical chart and explain whether the delay caused or contributed to your injury?
  • Who prepares the firm's expert reports on the standard of care and causation? Although you can start an Ontario claim without an affidavit or certificate of merit, the court's rules still require you to serve expert reports in practice.
  • When you have questions, find out who'll answer them and how you'll get updates. Find out what happens next if the firm declines your case.

The office's location is worth checking too. Several listed offices are in Toronto rather than Mississauga. Can the first discussion happen remotely, and would you still need to travel for later meetings? A broad-practice firm such as Nanda & Associate Lawyers may have reviews about unrelated work, so ask about the lawyer's diagnosis-claim experience instead of relying on those reviews.

Get the fee terms in writing

A free consultation means you won't pay for that first conversation with the firm. The firm still hasn't agreed to take your case. The listings for Sommers Roth & Elmaleh and Neinstein Medical Malpractice Lawyers include free consultations as well as contingency fees. Does the contingency agreement cover all your costs? Don't assume those expenses are all included: ask who pays for medical records or expert reports and how the fee is calculated. If fee details are missing, ask for them before booking a consultation.

If a firm promises you'll recover a particular amount, be wary. Your result isn't something published verdicts can predict. Ask the firm directly whether it's taking your case if your messages keep going unanswered and a deadline could be near. This is general information, not legal advice for you.

Questions people ask

How long do I have to start a misdiagnosis claim in Mississauga?
You generally have two years to start an Ontario claim after you've discovered it. You've discovered the claim when you know you were injured and a health care provider contributed to it, or when you reasonably ought to know. You'll also need to ask: was a lawsuit appropriate? There's also a 15-year ultimate period for claims under the Limitations Act. An Ontario lawyer can check whether a suspension applies to your dates.
Do I need an expert report before starting an Ontario malpractice claim?
You can start an Ontario claim without first getting an affidavit or certificate of merit. The court's rules still require you, in practice, to serve expert reports addressing the standard of care and causation. Even though you don't need an initial certificate, ask how the lawyer would review your medical chart and arrange those reports to check whether the provider's conduct caused your injury.
Which listed lawyers have offices in Mississauga?
You'll find offices for Sommers Roth & Elmaleh and Nanda & Associate Lawyers in Mississauga. The other offices listed are in Toronto, 23 or 24 km from Mississauga. You still need to find out who'll handle your file, whatever the office address. Before you book, ask who would assess the missed diagnosis and whether you'd still need to travel later if you meet remotely at first.
Does the deadline work differently for a child's missed diagnosis?
Yes. If someone under 18 has no litigation guardian for the claim, Ontario's two-year limitation period doesn't run. The 15-year ultimate period doesn't run either if a minor has no litigation guardian when the claim arises, as Wong v. Lui, 2023 ONCA 272 discusses. Your child's situation may change the deadline for starting a claim, so ask an Ontario lawyer.
Is there a cap on compensation for an Ontario misdiagnosis claim?
There's no statutory cap in Ontario on economic losses such as lost income or future care. The trilogy cap is the national limit judges have set for non-pecuniary damages. You can't swap them. A firm's published recovery doesn't tell you what another claim is worth. An Ontario lawyer can explain which category your losses belong in.
How much weight should I give Google reviews when choosing a lawyer?
Use the reviews to ask how the firm communicates with clients and treats them. Reviews don't prove a firm's malpractice results. Some of the many reviews for Nanda & Associate Lawyers come from clients discussing real estate work. Although clients praise communication at several other listed firms, some say they didn't get follow-up. When you ask about that lawyer's diagnosis-claim experience, ask how you'll get updates too.
Do I have to notify the doctor or hospital before starting a claim?
Before suing doctors, nurses or hospitals for malpractice in Ontario, you don't need pre-suit notice. You still have a filing deadline. Go over your treatment and discovery dates with an Ontario lawyer before deciding when you need to act. The lawyer can explain how these rules apply to you, but this general information isn't legal advice.
Which listed firms say they offer contingency fees?
Sommers Roth & Elmaleh, Howie, Sacks & Henry LLP, Neinstein Medical Malpractice Lawyers, Bogoroch & Associates LLP and Nanda & Associate Lawyers say you can pay their legal fees on contingency. Would each firm take your claim on those terms? Ask before proceeding. Check that the agreement explains how the lawyer's share is calculated, along with who pays the case expenses.
Does a free consultation mean the whole case is free?
You won't necessarily get later work free just because the consultation is free. Although Gluckstein Lawyers and Thomson Rogers LLP say consultations are free, their contingency terms haven't been confirmed. Sommers Roth & Elmaleh, Howie, Sacks & Henry LLP, Neinstein Medical Malpractice Lawyers and Bogoroch & Associates LLP say both free consultations and contingency fees are available. Ask for the proposed fee agreement before hiring a lawyer, and get them to explain what the case expenses cover.

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

Nearby cities

Other lists in Mississauga

Hurt by medical care in Mississauga? Let's talk it through.

Most people who reach out aren't sure yet, and that's fine. Share a few lines and a malpractice lawyer near you can look at it with you, at no cost.

  • It's free, and talking to a lawyer doesn't commit you to anything.
  • Where we know the local rules, you'll see your likely filing deadline right away.
  • Your answers are encrypted and never sold or used for ads.

Start with one question

Free and private, never used for ads

Get the top spot for misdiagnosis lawyers in Mississauga

The featured spot here is taken right now. Spots do open up, and nearby lists may be free, so tell us where you practice and we'll tell you what's open.

  • One featured spot per list, so you're never one of several
  • Shown first and labeled Featured, for a year
  • Your photo, your bio, a call button and case review requests

From $1,800a year, practice area list

Every plan and market or ask to be considered for the list itself, which is free.

Ask what's open

  • Best Misdiagnosis Lawyers in Mississauga, ON (2026)

A flat yearly fee, labeled Featured on the page. Never a share of any case.

Hurt by medical care?Talk it through with a lawyer, free.