Travel insurance policies primarily provide coverage for any new and unexpected illnesses or injuries that occur after the policy comes into effect. Pre-existing conditions and preventive care are generally not covered due to the short-term nature of these plans. Depending on the age of the insured however, some policies do provide some coverage for an acute onset of a pre-existing condition. An acute onset of a pre-existing condition is defined as a sudden and unexpected recurrence of a pre-existing medical condition and can only be diagnosed by a doctor at the time of visit. That being said, a policy you can consider purchasing for your grandparents to protect them from anything unexpected is Safe Travels USA Comprehensive. This policy will also proivde them with some coverage for an acute onset of a pre-existing condition should anything occur.
Insurance rates are regulated by law. You can't find the same insurance plan for a lower price anywhere else