What travel insurance options are available for a Thai couple visiting the US, specifically with direct billing arrangements?

Good morning all,

Not a visa question but a travel insurance question.

My Thai wife and I will be visiting the US for a month.

She wants to buy travel insurance. Does anybody know of an insurance company that does this type of insurance but, most importantly, has direct bill ( meaning, god forbid if something should happen, that the hospital can deal directly with the insurance company for payment )

Thank you for your help.