Pre-existing condition refers to any injury, disease or illness occuring prior to the effective date of your insurnace.
A deductible is a way for the insurance company to reduce claims and your premium. If your plan has a $100 deductible, you pay the first $100 of expenses and then the insurance company picks up the rest/ The higher the deductible, the lower the cost and vice versa.
Yes, you can do this as long as you complete the application online.
For Travel Medical, Multi-Trip Medical and Medical Evacuation Policies, coverage begins at 12:01AM the day of your departure. If purchased on, or after your departure date, coverage begins at 12:01AM the following day. For Flight Accident Policies, coverage becomes effective the day of your departure upon boarding your flight.