Diagnostic errors are one of the most serious medical errors that can occur in a medical setting. In the United States, an estimated six million cases of missed and misdiagnoses lead to patient harm each year. Understanding the distinction between a missed diagnosis and a delayed diagnosis matters both medically and legally, particularly for missed or delayed diagnosis attorneys evaluating whether medical malpractice cases may exist.
What Is a Missed Diagnosis?
A missed diagnosis occurs when a healthcare provider either reaches no conclusion about a patient’s underlying condition or incorrectly concludes that no significant condition is present. Misdiagnosis occurs when a provider identifies the wrong condition entirely, directing the patient toward inappropriate treatment while the actual illness goes unaddressed. The correct diagnosis is never made, or is made only after the patient seeks care elsewhere, and in the interim the true condition may continue to progress unchecked.
What Is a Delayed Diagnosis?
A delayed diagnosis occurs when a provider eventually arrives at the correct diagnosis, but not within a timeframe that a reasonably competent provider would have. Unlike a missed diagnosis, the correct answer is ultimately reached, but the delay itself may cause harm. Symptoms may be initially dismissed or necessary tests may not be ordered, and abnormal results may go without timely follow-up. For time-sensitive conditions, a delay of mere days or weeks can meaningfully affect the range of available treatments and the likelihood of recovery.
What Are the Common Causes of Missed and Delayed Diagnoses?
Diagnostic errors usually do not occur for one single reason. The most common contributing factors include failure to take a thorough medical history or to order appropriate tests and imaging, as well as misinterpretation of test results. Communication breakdowns between medical professionals and inadequate follow-up on abnormal findings are also involved in many cases.
Which Medical Conditions Are Most Vulnerable to Diagnostic Errors?
Certain conditions are disproportionately involved in missed and delayed diagnosis cases, typically because their symptoms overlap with less serious illnesses. Commonly affected conditions include:
- Cancer, including breast, colon, and lung cancers, which may be overlooked in early stages when treatment is most effective
- Heart attack and cardiovascular disease, which can present with symptoms resembling acid reflux or anxiety
- Stroke, sometimes misattributed to migraine or other causes, particularly in younger patients
- Serious infections such as meningitis, sepsis, and Lyme disease, which can deteriorate rapidly without prompt identification
- Neurological conditions, pulmonary emboli, and appendicitis, where the timing of diagnosis is directly tied to outcomes
Why the Distinction of Missed vs. Delayed Diagnosis Matters Legally
Both types of diagnostic error can lead to medical malpractice claims, but the nature of the error shapes how a case is built.
In missed diagnosis cases, the analysis typically centers on what the provider failed to do that allowed the correct diagnosis to be overlooked. In delayed diagnosis cases, the focus is on the gap in time. That is, whether a reasonably competent provider would have arrived at the correct diagnosis sooner, and whether that delay caused harm beyond what the patient would have experienced otherwise.
Damages may differ accordingly, reflecting the distinct ways each error, including pain and suffering attributable to the intervening period, affects patient outcomes.
Does a Missed or Delayed Diagnosis Constitute Medical Malpractice?
Many diagnostic errors do not rise to the level of medical malpractice. A viable claim generally requires showing that the provider’s conduct fell below the accepted standard of care, meaning a reasonably competent provider in the same specialty would have reached a different conclusion or taken additional steps. Demonstrating that the error caused measurable harm is also required.
The doctor-patient relationship, the specific facts of the clinical encounter, and the sequence of events following the error all factor into how a claim may be evaluated. Missed or delayed diagnosis attorneys can consult with medical experts to assess whether the standard of care was met.
What to Do If You Suspect a Missed or Delayed Diagnosis
If you believe a diagnostic error has affected your health or the health of a family member, seek evaluation from a different provider to address the underlying condition and to establish an independent medical assessment. Retaining copies of records, imaging studies, and test results from the original provider is also important. Missed or delayed diagnosis attorneys can review those records, consult with appropriate medical experts, and help determine whether the circumstances may support legal action.
Pennsylvania’s statute of limitations for personal injury and wrongful death cases is usually two years from the date of (1) injury or (2) discovery of the harm and the reason for the harm. Claims involving minors may be filed until the claimant reaches age 20. There are some cases in which certain other rules apply to the statute of limitations. Given the frequent subtlety in assessing the statute of limitations and the time needed to investigate and prepare these cases, early legal consultation is advisable.
Schedule a Free Consultation With Our Missed or Delayed Diagnosis Attorneys
Kline & Specter has handled many complex misdiagnosis and delayed diagnosis cases on behalf of patients and families in Pennsylvania, New Jersey, Delaware, New York, and nationwide. The firm includes more than 50 attorneys, including five doctor-lawyers who bring both legal and clinical analysis to each matter. The firm prepares every case with the expectation of going to trial.
Individuals with questions about a potential misdiagnosis or delayed diagnosis claim may contact the firm online or call 800-243-100 for a confidential evaluation.
