Gastrointestinal illness was behind 130 insurance claims and roughly $150,000 in total payouts recorded by 1Cover Travel Insurance across its Australian and New Zealand books between January and April 2026, according to figures the Sydney-based insurer released on May 26. At an average of around $1,000 per claim, the data point to a category of illness that generates consistent claim volume despite being perceived as minor by most travellers. The three destinations most frequently linked to gastro claims during the period were Indonesia and Bali, Thailand, and Japan.
Natalie Ball, director of 1Cover Travel Insurance, said travellers frequently underestimate how quickly the costs associated with an overseas stomach illness can multiply beyond the initial medical consultation. “Most people think a stomach bug overseas is just a rough few days, but it can escalate quickly into a hospital stay, extra hotel nights, and last-minute flight changes. In many cases it’s not just about feeling unwell. It’s the cost of treatment and possible hospital care that travellers don’t anticipate, particularly in destinations like the United States, where a quick doctor’s visit alone can cost upwards of $200,” Ball said.
Within 1Cover’s January-to-April 2026 data, the US produced the single most expensive gastro-related claim – $44,162 – after a traveller was admitted to hospital with peptic ulcer disease that presented initially as gastroenteritis. The claim covered an extended inpatient stay and a surgical procedure. That pattern – the US generating disproportionately large medical claims – is consistent with findings released separately by Zoom Travel Insurance in March 2026. The insurer reported that the US appeared in four of its five largest claims across all of 2025.
Its biggest case exceeded $1 million after an Australian traveller was hospitalised following a brain aneurysm. Three further large US-based claims involved septic shock managed in an intensive care unit, a tuberculosis diagnosis, and orthopaedic surgery following a fall that fractured both a hip and a wrist. Zoom’s only top five claim from outside the US involved a lung infection requiring hospital admission in Switzerland, at a lower overall cost. Zoom attributed the cost levels to the structure of the US healthcare market – private billing rates, specialist fees, and length-of-stay charges – rather than to the severity of presentations alone.
The table below, drawn from 1Cover’s internal claims data for the period, shows the five largest individual gastro-related payouts.
Medical expenses account for much of the dollar value in gastro claims, but 1Cover’s data show a parallel stream of costs tied to travel disruption rather than treatment. Rebooked flights, unplanned accommodation extensions, and cancelled tour components all contribute to final claim settlements. The largest purely cancellation-related gastro claim lodged with 1Cover during the January-to-April 2026 window was approximately $4,600, arising from an illness that prevented travel before departure.
Ball said the tendency for gastroenteritis to be short-lived shapes how claimants respond – rescheduling rather than abandoning plans outright – but that the financial consequences of even a brief disruption can be material. “Gastro is usually temporary, so travellers are more likely to delay or rearrange their plans rather than cancel altogether. But even a relatively short illness can still lead to significant costs, especially when medical treatment or last-minute travel changes are involved,” Ball said.
Taken together, the 1Cover and Zoom data sets illustrate two distinct risk profiles within the travel insurance space. At the high-frequency end, common illness in popular short-haul markets – particularly across Southeast Asia – produces a steady volume of claims averaging around $1,000, with cancellation and disruption costs sometimes adding a further several thousand dollars per event. At the low-frequency, high-severity end, the US remains a jurisdiction where a single hospitalisation can produce claims running into the tens or hundreds of thousands of dollars, driven by the pricing structure of its private healthcare system rather than by any difference in clinical severity.
Ball said the overlap between these two profiles – the routine and the catastrophic – reinforces the case for policy coverage that addresses both medical treatment and travel disruption. “With major global travel concerns dominating headlines, it can be easy to overlook how disruptive a seemingly minor illness can be while travelling. Everyday illnesses can derail an entire trip, and before you know it, you’re changing flights, extending hotel stays, or cancelling long-awaited plans. Having the right cover in place before you go means one minor thing doesn’t have to turn into a major headache,” Ball said.
