Learn more about the ASTRO 2021 Annual Meeting registration policies for cancellation, ticketed events, check payments and visas.
ASTRO does not accept check payments for online registrations. If you would like to pay your registration by check, please contact the ASTRO Registration Center.
In most cases, citizens of foreign countries will need a visa to enter the United States. It may take up to three months to obtain a visa. For additional information, please visit the U.S. State Department website. To receive your visa letter, you must be registered and paid in full before you can download your letter. To inquire about letters of invitation, please contact the ASTRO Registration Center.
For registration policy requestion, please contact the ASTRO Registration Center: