Travel insurance for Guam depends a lot on where you are coming from, and it is worth sorting out before you fly into Antonio B. Won Pat International Airport (GUM). Guam is a United States territory in the western Pacific, which changes the insurance picture in an important way: for American travellers, US health cover often applies here, while international visitors need travel insurance just as they would for any overseas trip.
If you are a US traveller
Guam is treated as part of the United States for health-cover purposes. Original Medicare, for example, travels with you to Guam as it does to any US state, and many US private health plans cover you there too. That is a meaningful difference from a foreign destination. Even so, it is worth confirming your specific plan covers Guam and, importantly, covers medical evacuation, because the one thing US territory status does not remove is the cost of an airlift.
Medical care and evacuation
Guam has two civilian hospitals, the Guam Memorial Hospital and Guam Regional Medical City, which handle routine and emergency care. The island's isolation means specialist care can be limited, and a serious case may be airlifted to another city or to the US mainland for proper treatment. That evacuation is expensive, and it is the main reason to make sure your cover, whether a US health plan or a travel policy, includes medical evacuation and the transport costs that come with it.
Choosing a policy
International visitors should treat Guam like any overseas trip and buy travel insurance with emergency medical treatment and a strong evacuation limit. US travellers should check that their existing plan covers Guam and evacuation, and add a travel policy if it does not. Either way, read the medical and evacuation limits and the exclusions, and confirm cover for any diving or water activities you plan. Subscription-style cover such as SafetyWing suits long or multi-country trips, while a per-trip policy is simpler for a single visit. Buy before you leave home.