What to do after a misdiagnosis or delayed diagnosis
Last updated: July 31, 2026 · Written by the HEARD Editorial Team
After a misdiagnosis, focus first on getting the right care: request a second opinion, ask for the specific tests that were not done, and make sure the correct diagnosis is documented. Then request your complete records, write a dated timeline of what happened, and decide whether to file a formal complaint or seek legal advice. Diagnostic errors are common and reporting them is how systems change.
Diagnostic error is a system problem, not a personal failure
The National Academies of Sciences, Engineering, and Medicine concluded that most people will experience at least one diagnostic error in their lifetime. Missed, delayed, and incorrect diagnoses are recognized patient safety issues, and they disproportionately affect patients whose symptoms are dismissed.
If your symptoms were minimized and later proved significant, that is information about the process, not about you.
Step one: secure correct care
- Ask for a second opinion, ideally from a specialist in the relevant area.
- Bring your symptom timeline and prior test results to that visit.
- Ask directly: what else could explain these symptoms, and what would rule it out?
- Confirm that the corrected diagnosis, and the date it was made, appear in your chart.
Step two: build the record
Request complete records from every facility involved, including notes, imaging reports, labs, and discharge summaries. Build a dated timeline: what you reported, what was said, what was ordered, and what was not.
Keep the timeline factual. A clean chronology is more persuasive than an account written in frustration, and it is the document that patient relations, a new clinician, or an attorney will actually use.
Step three: decide how far to take it
- Raise it with the clinician or practice, in writing through the portal.
- File a grievance with the hospital's patient relations or risk management office.
- Report to your state health department or state medical board where appropriate.
- Consult a licensed attorney in your state if you are considering legal options, because deadlines to file are limited and vary.
What to document
- Every symptom you reported and the date you reported it
- What the clinician said, in their words where possible
- Tests ordered, tests declined, and the reasons given
- The date the correct diagnosis was made and by whom
- Treatments delayed and the consequences you experienced
- Copies of all records, portal messages, and complaint submissions
Questions you may consider asking
- What was the reasoning behind the original diagnosis?
- What findings changed the conclusion?
- Could this have been identified earlier with a different test?
- What is the plan now, and what monitoring do I need?
- How do I get the record corrected to reflect the accurate diagnosis?
How HEARD helps
HEARD is a nurse-founded patient advocacy app that helps you document symptoms in plain language, organize what happened during a visit, prepare questions before an appointment, and put together a clear written summary if you need to escalate a concern.