I imagine that a simple entry/vacation visa is all that's needed.
U.S. State Department wrote:Pleasure, Tourism, Medical Treatment - Visitor Visas (B-2) - As examples, if the purpose of your planned travel is recreational in nature, including tourism, amusement, visits with friends or relatives, rest, medical treatment, activities of a fraternal, social, or service nature, and participation by amateurs, who will receive no remuneration, in musical, sports and similar events or contests, then a visitor visa (B-2) would be the appropriate type of visa for your travel.
Applicants for visitor visas must show that they qualify under provisions of the Immigration and Nationality Act. Applicants must demonstrate that they are properly classifiable as visitors under U.S. law.
The presumption in the law is that every visitor visa applicant is an intending immigrant. Therefore, applicants for visitor visas must overcome this presumption by demonstrating that:
* The purpose of their trip is to enter the U.S. for business, pleasure, or medical treatment;
* That they plan to remain for a specific, limited period;
* Evidence of funds to cover expenses in the United States;
* Evidence of compelling social and economic ties abroad; and
* That they have a residence outside the U.S. as well as other binding ties that will insure their return abroad at the end of the visit.
Yes, we are a little paranoid about people trying to emigrate. That's where you might run into trouble. And don't carry any drugs in, either. I hope that's self-evident, but there are some idiots on this board.
And I may be one of them. I've always traveled on a u.s. passport and in europe, so it's been pretty pro-forma. After reading the expectations that they have of you, I understand why you asked.