The doctors who want to attend the seminar or conferences in the USA should apply for B-1visitor visa. B-1 visa is applicable for all the people who are traveling to the USA for business or for attending any professional or educational conventions and conferences etc., In order to apply for the B-1 visa one must demonstrate to a consular officer that he or she qualifies for the USA visa in accordance with the USA Immigration and Nationality Act (INA), under section 214 (b) of the INA which presumes that every B-1 applicant is an intending immigrant. One can overcome this legal presumption by showing certain documents and following certain steps in application.

There are also some supporting documents to be submitted at the time of interview. The supporting documents are as follows:

• Criminal or court records pertaining to any previous arrest or conviction anywhere even if you have completed your sentence or were later pardoned.
• Current proof of income tax payments, property or business ownership or assets.
• A letter from your previous employer detailing about your position, salary and including as how long have you been employed and also an authorized vacation along with business purpose and if any of your U.S. trip.
• Your travel itinerary and other explanation about your planned trip in detail.

All the details can be found in the following url: http://www.ustraveldocs.com/in/in-niv-typeb1b2.asp