Why Emergency Medicine Doctors Get Sued: The Missed Heart Attack, Stroke, and the CT That Wasn't Ordered

By John Mahoney · June 2026 · 9 min read

Emergency medicine is one of the most litigated fields in all of medicine, but not because emergency physicians are careless. They are sued because of what the job is: undifferentiated patients with no prior chart, presenting at the worst hour of their lives, in an environment built on rapid triage and handoffs. For a med-mal attorney on either side of the table, the ER case is almost always the same case wearing different clothes — a diagnosis that was missed, delayed, or anchored too early, and a test that was never ordered. This guide walks through why these doctors get sued, which conditions actually drive the claims, and what separates a strong emergency-medicine case from a weak one.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. The closed-claims figures cited here are drawn from medical-malpractice insurer and registry reports; they describe reported patterns and are not a substitute for case-specific expert review.

The Frequency and Severity Reality

Emergency medicine sits in the medium-to-high band for claim frequency. In the widely cited Jena et al. analysis, roughly 7.5% of emergency physicians face a malpractice claim in a given year — near the all-physician average — but the lifetime exposure is far higher: studies report that about 75% of emergency physicians are named in a suit over a career. That gap between annual and lifetime risk is the whole story of the specialty: high patient volume, acute presentations, and no continuity of care mean the chances of being named eventually approach a near-certainty.

Severity is where ER claims earn their reputation. Death is the single most common injury in these claims, and reported data put roughly half of emergency-medicine claims in the serious-injury-or-death category. Settled cases have averaged around $298K and plaintiff trial verdicts around $817K in one large dataset, with the highest-cost claims clustering in the vascular and infectious misses. The takeaway for case valuation: ER claim frequency is moderate, but the tail of catastrophic, diagnosis-driven outcomes is what carries the dollars.

The Dominant Allegation: Diagnostic Error

The center of gravity in emergency-medicine litigation is diagnosis. Diagnosis-related allegations — missed, delayed, or wrong diagnosis — account for roughly 33% to 37% of ER claims and an outsized share of the payout dollars (reported at roughly 47% of ED payout dollars in one analysis). The next category, improper performance of a procedure, trails far behind at around 17% to 18%, followed by smaller buckets for failure to monitor, medication errors, and communication-related allegations.

This is the cognitive-error profile, and it matters for how you build the case. Emergency medicine is a "cognitive" specialty: the claim is almost never about a slipped scalpel and almost always about a thought process — a differential that closed too soon, a red flag that was rationalized away, a test that would have changed everything and wasn't ordered.

The Cannot-Miss Conditions

Every emergency-medicine attorney should know the short list of conditions that drive the claims, because the same diagnoses recur across nearly every closed-claims dataset. These map cleanly onto the cross-specialty "Big Three" of misdiagnosis harm — vascular events, infections, and (less often in the ED) cancers:

• Acute myocardial infarction / chest pain. The archetypal ER miss and reportedly the single most common missed diagnosis, with one of the highest paid-to-closed ratios. The classic fact pattern: an atypical presentation discharged without an adequate serial workup.
• Stroke and cerebrovascular events. A leading vascular miss, with posterior-circulation strokes especially prone to being missed on initial imaging and dizziness/headache presentations being mislabeled.
• Aortic aneurysm and dissection. Low-frequency, catastrophic, and frequently anchored as something more common (renal colic, musculoskeletal back pain).
• Pulmonary embolism. The diagnosis you have to actively consider to catch; absence of a documented PE consideration is a recurring plaintiff theme.
• Infections — sepsis, meningitis, spinal/epidural abscess, necrotizing fasciitis. High-severity, time-sensitive, and often presenting early with nonspecific symptoms.
• Appendicitis. The most common driver in pediatric and abdominal-pain ED claims.

For an intake screen, the presence of any of these conditions plus a documented delay or miss is a high-merit signal on the plaintiff side and a high-risk flag on the defense side. It is the closest thing the specialty has to a triage rule for case value.

The Contributing Factors That Actually Drive Payment

Knowing the diagnosis is missed is not the same as knowing why the claim pays. The reported contributing-factor data point to a consistent set of breakdowns behind ER diagnostic claims:

• Cognitive and clinical-judgment factors appear in the overwhelming majority of ED diagnosis claims — one study cited them in roughly 96% — covering anchoring, premature closure, and narrow diagnostic focus.
• Failure or delay in ordering an appropriate diagnostic test is the single most common process breakdown, reported in the range of 53% to 58% of claims, with the CT scan the test most frequently not ordered in time.
• Inadequate history and physical examination appears in roughly a third to 42% of claims.
• Incorrect interpretation of a test (around 37%) and failure to obtain or manage a consult (around 33%) round out the clinical drivers.
• Handoff and communication failures — reported in roughly 24% of claims — plus inadequate supervision of trainees and midlevels, and the workload/cognitive-overload context that the specialty runs on.

This is where documentation and communication become payout-drivers, not just liability questions. A thin chart with no documented differential, no recorded reassessment, and no return-precaution instructions does not, by itself, prove negligence — but it makes the claim far harder to defend and far easier to settle. The single most actionable system theme across the specialty is the failure to close the loop: a pending CT read that never gets back to the physician, an incidental finding that no one follows up, a discharge with no documented safety-net. Both sides should screen for it first.

Strong Case vs. Weak Case in the Emergency Department

Because ER litigation is so consistent, the line between a strong and a weak case is unusually legible — and useful to attorneys on both sides.

What makes an emergency-medicine case strong

• A cannot-miss condition with a documented delay. One of the conditions above, plus a record showing the diagnosis was reachable with available data and standard workup, is the core of a high-value claim.
• An indicated test that was not ordered — especially a CT. Failure-to-order is the most common breakdown and the most concrete deviation to put in front of a jury, because it is a discrete, provable decision rather than a judgment call.
• A discharge without reassessment or documented return precautions. The patient who was sent home while still abnormal, with no safety-net, is the recurring high-severity pattern.
• Clean causation. The window matters — a missed stroke or MI only pays if timely diagnosis would have changed the outcome. The strongest cases show the treatable window was open and was missed.

What makes it weak — the defense view

• A genuinely atypical presentation with an appropriate, documented workup. Emergency medicine is a probability discipline; a defensible chart that shows the right differential was considered and reasonable testing was done is strong defense even when the outcome was bad.
• A causation gap. If earlier diagnosis would not have changed the outcome — the infarct was complete, the dissection unsurvivable on arrival — the claim weakens regardless of the miss.
• A documented and followed return-precaution plan that the patient did not act on, which shifts the narrative away from the physician.

The expert who signs the merit certificate today is the expert the defense will move to exclude tomorrow, so it is worth pressure-testing the standard-of-care opinion and its reliability early. The same reasoning that supports the certificate of merit feeds directly into a later Daubert and FRE 702 challenge — build for both at once.

Bottom Line

Emergency physicians get sued because the specialty concentrates risk: high volume, acute and undifferentiated presentations, no continuity, and a workflow that rewards speed over deliberation. The claims are overwhelmingly about diagnosis — missed MI, stroke, aortic catastrophe, PE, and serious infection — and the most common, most provable deviation is a test, usually a CT, that was indicated and not ordered in time. The strongest cases pair a cannot-miss condition with a documented delay and a clean causation window; the weakest are defensible judgment calls with a thorough, well-documented workup. For both plaintiff and defense counsel, the work is the same: find the diagnosis, find the test that wasn't ordered, and prove whether the window was open.

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