Some have even had cover specifically for the event
All TT visitors who've needed healthcare on the Island so far have had the right travel insurance, according to Manx Care.
Those without the right protection run the risk of having to pay for medical procedures or repatriation themselves, which could cost tens of thousands of pounds.
Manx Care's been encouraging people to check what their insurance covers before travelling here.
Commercial Development Manager Andy Reed says they've even seen a new type of cover this year:
Renewed calls to return killer back to high security prison
TT 2025: Packed schedule for penultimate day of racing
Fire crews free person trapped in car following collision
Double-murderer Peter Newbery denied parole
Five local authorities looking for by-election candidates