I'm thinking of New Zealand. We frequently hear of people who can't get some expensive treatment because it's not funded by the government. Can you say for sure

I'm thinking of New Zealand. We frequently hear of people who can't get some expensive treatment because it's not funded by the government. Can you say for sure that every medical treatment available in the US is funded by your government? Will they even fly patients to the US for specialist care if it's not available locally?