Your pre-existing medical conditions will be covered by Travelex travel insurance as long as the Pre-existing Medical Condition Exclusion Waiver is in effect. In order to receive a Pre-existing Medical Condition Exclusion Waiver, you must purchase a Travel Select plan within 15 days of your initial trip payment or a Travel America plan within 3 days of your final trip payment. This means if you pay for a trip to Hawaii on the 1st of January, you will have up until the 16th of January to receive a Pre-existing Medical Condition Exclusion Waiver through the Travel Select plan or up to January 4th with Travel America (if the 1st was when you made your final trip payment).
Be sure to read the wording in your policy document concerning Pre-Existing Medical Condition Exclusions and when the waiver can and cannot be used.