How to Prove Diagnostic Medical Malpractice in Illinois

Diagnostic medical malpractice occurs when a healthcare provider fails to correctly identify a patient’s condition in a timely manner, resulting in harm that could have been avoided. To pursue a claim in Illinois, patients must prove that this failure constituted a breach of the accepted standard of care and directly led to injury or death.

Here is a step-by-step guide to building a successful diagnostic malpractice case in Illinois:

Step 1: Establish a Provider-Patient Relationship

You must first confirm that a formal relationship existed between you and the medical provider. This is typically demonstrated through medical records showing that the provider examined, diagnosed, or treated you.

Step 2: Identify the Diagnostic Error

Determine the nature of the diagnostic error. This could be:

• Misdiagnosis – A completely incorrect diagnosis.

• Delayed Diagnosis – A correct diagnosis, but made too late.

• Failure to Diagnose – Overlooking a serious condition entirely.

Step 3: Gather Medical Records

Request and review all relevant medical documentation, including:

• Provider notes

• Test results

• Imaging scans

• Prescription and treatment plans These records help establish what the provider knew, what they did, and what they failed to do.

Step 4: Consult a Qualified Medical Expert

Illinois law requires a medical malpractice plaintiff to file an affidavit of merit. This means:

• A licensed physician must review your case.

• The expert must provide a written opinion stating that there is a reasonable basis to file a malpractice claim.

Step 5: Prove a Breach of the Standard of Care

With the help of your expert, show that the provider failed to meet the standard expected of a reasonably competent professional under similar circumstances. This is the heart of any malpractice case.

Step 6: Prove Causation

Demonstrate that the diagnostic error directly caused harm. This step often requires evidence that:

• A correct or timely diagnosis would have improved your outcome.

• The delay or error led to the worsening of your condition or additional medical complications.

Step 7: Document Your Damages

To recover compensation, you must show that you suffered real, measurable harm. This includes:

• Additional medical expenses

• Lost wages or loss of future income

• Physical pain and emotional suffering

• Loss of quality of life or long-term disability

Step 8: File Within the Statute of Limitations

In many cases, the statute of limitations requires you to Under 735 ILCS 5/13-212:

You must file your claim within 2 years of discovering the malpractice.  However, there are exceptions--such as for minors and people with disabilities.  Each case is unique--so consult with an experienced trial lawyer immediately.

• No case can be filed more than 4 years after the actual mistake occurred.

• Minors have until their 22nd birthday in most cases.

Step 9: Work With an Experienced Medical Malpractice Attorney

Diagnostic malpractice cases are complex and expert-heavy. At Hurley McKenna & Mertz, P.C., we build strong claims using detailed investigations, leading medical experts, and years of litigation experience to fight for the justice you deserve.

Step 10: Take Action

If you believe your condition was misdiagnosed or diagnosed too late, don’t wait. Contact Hurley McKenna & Mertz, P.C. for a free case evaluation. We’ll review your situation and help you take the next steps toward holding the responsible parties accountable.

Serving patients in Chicago, Cook County, and throughout Illinois.