Yes, travel insurance is genuinely worth carrying for a trip to Phu Quoc, Vietnam's largest island in the Gulf of Thailand, and the most common reason a policy actually pays out here has little to do with the beaches. Motorbike rental is the default way to get around the island, and motorbike accidents are the single most frequent travel-insurance claim across Vietnam, far more common than anything related to swimming or diving.
Many standard policies only cover motorbike use if you hold a valid motorcycle license recognized in Vietnam and wear a helmet at the time of any incident, and some exclude scooters above a certain engine size entirely. Confirm your policy names motorbike or scooter riding specifically before renting one on Phu Quoc, since this single exclusion causes more denied claims here than any other factor travelers overlook.
Phu Quoc has local hospital facilities for routine treatment, but anything serious is typically stabilized on the island and then transferred to Ho Chi Minh City on the mainland, with further specialist treatment sometimes meaning an onward transfer to a regional hub such as Bangkok or Singapore. Confirm your policy covers medical transport off the island rather than assuming local facilities can handle a serious case.
Diving and snorkeling around the An Thoi archipelago south of the island are genuine draws, and most general policies cover recreational diving within standard depth limits, though check for a depth cap before booking anything beyond an introductory dive through a resort or local operator.
The southern monsoon, roughly May through November, brings heavy rain and rougher seas that can disrupt inter-island boat schedules and the occasional flight; trip-delay cover is worth checking if your visit falls in this window. Keep any clinic paperwork, police accident reports, and receipts for treatment or vehicle damage, since a motorbike claim in particular tends to need more documentation than a routine illness claim does.