Although procedures differ with each hospital, most will send you a packet of information once an appointment is made that will include a visa letter. This document will verify that you have an appointment and may estimate the amount of time you will need for your evaluation and treatment.

This letter must be taken to a U.S. embassy or consulate when you apply for a visa. Only a U.S. embassy or consulate can grant visas. Online visa applications are now available on the U.S. Department of State Web site。

The B-1/B-2 visitor visa is for people traveling to the United States temporarily for business (B-1) or for pleasure or medical treatment (B-2). Generally, the B-1 visa is for travelers consulting with business associates; attending scientific, educational, professional, or business conventions/conferences; settling an estate; or negotiating contracts. The B-2 visa is for travel that is recreational in nature, including tourism; visits with friends or relatives; medical treatment; and activities of a fraternal, social, or service nature. Often, the B-1 and B-2 visas are combined and issued as one visa: the B-1/B-2.

Note that your I-94 application, which you will complete when you arrive at the Los Angeles International Airport, requires a specific address, including street name and number of any hotel or residence, in order to be processed quickly. If you do not have this specific information when you arrive at the airport, the process may be extended for several hours.

All travelers to the United States must have a machine-readable passport. This includes all categories of passports – regular, diplomatic and official.