Yes! But you need to be quick: The pre-existing medical condition exclusion will be waived as long as the protection plan is purchased within 15 days of initial trip deposit.
Note: If you have a pre-existing condition, get your trip insurance right after you make the first payment for your trip, whether this is for flights, accommocation, FFI fees etc. You can always purchase additional coverage for your trip if your trip cost increases after your initial purchase of the FF Travel Protection Plan.