• consult with business associates
• attend a scientific, educational, professional, or business
         convention or conference
• settle an estate
• negotiate a contract

Learn more about Business Travel to the United States on a visitor visa.

• tourism
• vacation (holiday)
• visit with friends or relatives
• medical treatment
• participation in social events hosted by fraternal, social, or service
          organizations
• participation by amateurs in musical, sports, or similar events or contests,
         if not being paid for participating
• enrollment in a short recreational course of study, not for credit toward a
         degree (for example, a two-day cooking class while on vacation)

Learn more about Visitor Visas - Business and Pleasure.

If you are seeking medical treatment in the United States, the consular officer may ask for further documents at your visa interview, which may include:

• Medical diagnosis from a local physician, explaining the nature of the ailment and the reason you need treatment in the United States.

• Letter from a physician or medical facility in the United States, stating they are willing to treat your specific ailment and detailing the projected length and cost of treatment (including doctors’ fees, hospitalization fees, and all medical-related expenses).

• Proof that your transportation, medical, and living expenses in the United States will be paid. This may be in the form of bank or other statements of income/savings or certified copies of income tax returns (either yours or the person or organization paying for your treatment).

These are some examples of activities that require different categories of visas and cannot be done while on a visitor visa:

• study

• employment

• paid performances, or any professional performance before a paying audience

• arrival as a crewmember on a ship or aircraft

• work as foreign press, radio, film, journalists, and other information media

• permanent residence in the United States