A never event is a serious medical error that should not happen if proper safety procedures are in place. The term was coined in 2001 by Ken Kizer, then CEO of the National Quality Forum (NQF), to describe particularly shocking mistakes like leaving a surgical instrument inside a patient or operating on the wrong body part. To qualify as a never event, an incident must meet three criteria: it is clearly identifiable, it results in death or significant harm, and it is largely preventable.
The Most Common Never Events
The NQF maintains an official list of these events, formally called Serious Reportable Events (SREs). The original list contained 29 events across several categories, including surgical errors, product or device failures, patient protection failures, care management errors, environmental events, radiologic events, and criminal events. That list hadn’t been updated since 2011, but in 2024 and 2025 the NQF undertook a major revision, evaluating 66 candidate events to reflect how healthcare delivery has changed over the past decade.
Among surgical never events specifically, retained foreign objects (sponges, instruments, or needles left inside the body) are the most frequent, accounting for roughly half of all reported cases. Wrong-procedure surgery makes up about 25%, wrong-site surgery another 25%, and wrong-patient surgery is rare but does occur. A study examining nearly 10,000 surgical never events found that 6.6% of patients died, 32.9% suffered permanent injury, and 59.2% had temporary injuries. These are not abstract statistics. They represent people who went in for routine care and came out with life-altering harm.
Beyond the operating room, never events also include things like patient suicide in a supervised setting, infant discharge to the wrong person, patient death from a medication error, and stage 3 or 4 pressure ulcers acquired during a hospital stay.
Why They Still Happen
The name “never event” implies these errors should occur zero times, yet they persist. Data from the UK’s Healthcare Safety Investigation Branch has confirmed that never events continue at similar or even increased frequency over time. A 2024 systematic review identified 125 unique types of never events across the literature, with the same four showing up most often: wrong body part, wrong procedure, unintentionally retained foreign object, and wrong patient.
The reasons are systemic rather than individual. Operating rooms are high-pressure environments where teams change shifts, communication breaks down, and checklists get rushed. A single distracted moment during a sponge count or a skipped verification step can lead to a retained object. Fatigue, staffing shortages, and poor handoff communication between teams all contribute. Blaming one person rarely captures what went wrong.
How Hospitals Try to Prevent Them
The most widely known prevention tool is the Universal Protocol, designed by the Joint Commission to eliminate wrong-site, wrong-procedure, and wrong-person surgery. It requires a formal “time-out” before every surgical procedure, during which the entire operating room team pauses and verbally confirms the patient’s identity, the procedure being performed, and the correct surgical site. The time-out also covers allergies, whether antibiotics have been started, whether necessary implants or equipment are available, and whether the correct imaging studies are displayed. Any team member can raise a concern during this pause.
For retained surgical items, hospitals rely on a structured counting process. Surgical teams manually count every sponge, instrument, and needle before the operation begins and again before the surgical site is closed. Some facilities have added technology like barcoded sponges or radiofrequency detection systems to supplement manual counts. Multiple studies have focused on improving count accuracy, particularly during high-risk moments like shift changes during long procedures or emergency cases where counts may be skipped under time pressure.
Site marking is another standard safeguard. The surgeon marks the correct limb or side of the body with a permanent marker before the patient enters the operating room, ideally while the patient is still awake and can confirm the location.
Financial and Legal Consequences
Never events carry real financial penalties for hospitals. The Centers for Medicare & Medicaid Services (CMS) began moving toward non-payment for never events starting in 2008, under authority granted by the Deficit Reduction Act. The principle is straightforward: taxpayer-funded insurance programs should not pay hospitals more money to fix errors that should not have occurred in the first place. CMS has framed this as redirecting resources toward prevention rather than rewarding harm.
Many private insurers have followed CMS’s lead and adopted similar non-payment policies. Hospitals that experience never events also face potential malpractice lawsuits, regulatory scrutiny, and reputational damage. Some states require hospitals to disclose never events publicly, which adds an additional layer of accountability.
State Reporting Requirements
Reporting rules vary significantly by state. As of 2012, 27 states and the District of Columbia had enacted legislation requiring hospitals to report adverse events. Of those, 15 states used the NQF’s list directly, while 12 created their own customized lists of reportable events. Nearly all states with reporting systems made participation mandatory rather than voluntary.
States like California, New York, Pennsylvania, and Massachusetts both maintain their own adverse event reporting systems and participate in national infection tracking through the CDC’s network. Other states, including Florida, Minnesota, and Ohio, run their own reporting systems independently. The patchwork nature of these requirements means that national data on never events is incomplete, since not every state tracks the same events or reports them in the same way.
What It Means for Patients
If a never event happens to you or a family member, the hospital is generally expected to disclose the error, waive costs related to the additional care needed to correct it, and conduct a root cause analysis to determine what went wrong. You have the right to request information about what happened and what the facility is doing to prevent a recurrence.
The concept of never events has fundamentally shifted how hospitals think about patient safety. Rather than treating serious errors as inevitable, the framework establishes that certain harms are so egregious and so preventable that their occurrence signals a systemic failure. That distinction matters because it drives investment in safety protocols, team training, and the kind of institutional accountability that can prevent the next case.