Misdiagnosis in California
Average Settlement: $300,000 - $900,000 | Statute: 1 year from discovery of the injury or 3 years from the date of injury, whichever comes first
About Misdiagnosis
Misdiagnosis occurs when a healthcare provider incorrectly identifies a patient's condition, leading to inappropriate treatment or no treatment at all. This is one of the most common forms of medical malpractice and can result in disease progression, unnecessary procedures, or harmful medications. Cancer misdiagnosis is particularly devastating, as delayed treatment can mean the difference between a curable and terminal prognosis.
California Medical Malpractice Laws
Statute of Limitations
1 year from discovery of the injury or 3 years from the date of injury, whichever comes first
Damage Cap
$350,000 non-economic damages (MICRA — increasing annually under AB 35 starting 2023; rises to $750,000 for non-death cases and $1,000,000 for death cases by 2033)
Discovery Rule
California applies a robust discovery rule — the 1-year period begins when the patient discovers, or through reasonable diligence should have discovered, the injury.
Pre-Filing Requirements
Plaintiffs must provide 90 days' notice of intent to sue before filing a medical malpractice lawsuit.
Common Examples of Misdiagnosis
- •Diagnosing a malignant tumor as benign
- •Misidentifying a heart attack as acid reflux or anxiety
- •Confusing symptoms of stroke with migraine or vertigo
- •Incorrectly diagnosing an infection, leading to wrong antibiotic treatment
- •Failing to identify cancer on imaging studies such as mammograms or CT scans
- •Misdiagnosing autoimmune conditions as psychological disorders
Key Facts
- ✓Studies indicate that diagnostic errors affect approximately 12 million adults in the United States each year in outpatient settings
- ✓To prove misdiagnosis, the plaintiff must show that a competent physician in the same specialty would have correctly identified the condition under the same circumstances
- ✓Medical records documenting the patient's reported symptoms, test results, and the physician's reasoning are essential to building a misdiagnosis case
- ✓Misdiagnosis claims often require demonstrating that the correct diagnosis was on the physician's differential diagnosis list but was improperly ruled out
- ✓The damages in misdiagnosis cases are measured by the difference in outcome between what occurred and what would have happened with a timely, correct diagnosis
- ✓Radiology and pathology misreads are among the most clear-cut misdiagnosis cases because the evidence is preserved in images and slides
- ✓MICRA (Medical Injury Compensation Reform Act of 1975) was significantly amended by AB 35 in 2022, raising the non-economic damage cap for the first time in nearly 50 years.
- ✓California uses a pure comparative negligence system, allowing plaintiffs to recover damages even if they are primarily at fault.
- ✓Attorney fees in medical malpractice cases are limited by a sliding scale under MICRA.
- ✓Punitive damages are not subject to MICRA's cap and may be awarded upon proof of malice, oppression, or fraud.
- ✓Periodic payment of future damages can be ordered for judgments exceeding $50,000.
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This information is for educational purposes only and is not legal advice. Consult a licensed medical malpractice attorney in California.