Changes or Cancellations

Last-minute changes happen. Reference the information below to understand the cancellation process for your registration or hotel reservation.

Registration Changes and Cancellations

Submit registration changes or a cancellation for the 2018 Annual Meeting online.

Registration Cancellation Deadline: Tuesday, May 29, 2018, at 11:59 PM (EDT)                                  

  • Registration Cancellation Fee: $75
  • No refunds for cancellations received after the May 29, 2018 at 11:59 PM (EDT) cancellation deadline
  • Refunds will be processed after the Meeting
  • To retain 2018 ASCO Annual Meeting Videos and Slides, visit the bookstore

Registration substitutions must be sent via email and must be submitted by either the person who paid for the registration or by the original attendee. 

Hotel Reservation Changes and Cancellations

The online hotel reservation website is now closed.  

Need to cancel or change a reservation? Contact the hotel directly, at least 72 hours prior to your scheduled arrival date.  

Cancellations made less than 72 hours prior to your arrival date will result in a charge equal to 100% of your total stay.

Need assistance at the meeting for your current reservation? Visit the ASCO Hotel Assistance Desk, located in Concierge Services in the Grand Concourse Lobby, during the following hours:  

June 1 - 4                      7:00 AM – 6:00 PM

June 5                           7:00 AM – 1:00 PM

Need to make a new reservation?  

If you still need to book a hotel room, consider these options:

-Corporate Travel Resources provided by your company

-Popular Travel Websites

-Rental by Owner sites

-Hotels outside the downtown area

For additional information, contact:

ASCO Annual Meeting Customer Service Center
11208 Waples Mill Road, Suite 112 
Fairfax, VA 22030 
Phone: 888-788-1522 (within the U.S.) 
703-449-6418 (outside the U.S.)
Fax: 703-563-2715

Hours of Operation 
8:30 AM-5:00 PM (Eastern Time) 
Closed on weekends and U.S. holidays

Email for more information about registration
Email for more information about hotel reservations