Visa Information

If you require a visa to enter the United States, please check with your local US embassy or consulate to obtain the necessary documents. Please allow enough time to process your visa. Visit the website for information on the visa application process.

Letter of Invitation

On request, CRT is also pleased to send an invitation for participation in CRT 2021. This invitation is not a commitment on the part of CRT to provide any financial support, a guarantee of the acceptance of any submissions by the attendee, nor a guarantee that the consulate will issue the visa. Letters of invitation are sent only to those individuals who have registered to attend the program and whose payments have been verified.

To request an invitation letter, please email

Before You Book Your Travel, Please Check Your Passport!

If your passport is expired or due to expire in the near future, please renew it promptly. Visitors to the United States are typically required to be in possession of passports that are valid for six months beyond the period of their intended stay.

CRT welcomes physicians and healthcare providers from around the globe. However, please Note: Under the Visa Waiver Program (VWP) Improvement and Terrorist Travel Prevention Act of 2015, travelers in the following categories are no longer eligible to travel or be admitted to the U.S. under the VWP:

  • Nationals of VWP countries who have traveled to or been present in Iran, Iraq, Libya, Somalia, Sudan, Syria, or Yemen, on or after March 1, 2011 (with limited exceptions for travel for diplomatic or military purposes in the service of a VWP country).
  • Nationals of VWP countries who are also nationals of Iran, Iraq, Sudan, or Syria. These individuals will still be able to apply for a visa using the regular appointment process at a U.S. Embassy or Consulate. For those who require a U.S. visa for urgent business, medical, or humanitarian travel to the U.S., U.S. Embassies and Consulates stand ready to handle applications on an expedited basis.

U.S. Customs and Border Protection (CBP) strongly recommends that any traveler to the U.S. check his or her ESTA status prior to making any travel reservations or travelling to the U.S. More information is available on the DHS website and on the CBP website.

If you have received a Visa from any of the seven countries listed above, CRT recommends you check with your government’s passport office for more information.

Thank you, and we look forward to having you at CRT 2021!