Do I want to purchase strength insurance if I want to travel to the UK for a month?

I am an American citizen with health insurance surrounded by the US. Will the NHS cover any necessary trips to the hospital or is it only applicable to British residents?
Answers:
yes carry health insurance ... you would be treated through NHS in cases of dire emergency but for everything else you would own to pay ... it's not worth taking the risk of coming without condition insurance
You will single get emergency treatment on the NHS, everything else would have to be covered by private insurance.
The NHS treats everyone
healthplans.bebto.com - here is my health insurance plan. As I remember they can provide such a service.

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