Please click "New Registration" to start your registration. After completing your registration, please be sure to book your hotel reservation. Use the same email address that you received your invitation or application approved email notification. Please email CROIregistration@iasusa.org for assistance.

Please note: All in-person CROI registrants are required to reserve a hotel room through the CROI housing system in order to attend CROI 2023.  Exceptions include if the registrant is a permanent resident in the Seattle area (ie, address within a 50-mile radius of the Seattle Convention Center) or the registrant is sharing a room with an approved CROI attendee with accommodations booked via the CROI housing system.  Other exceptions must be approved by the CROI organizers by submitting a hotel waiver request to CROIregistration@iasusa.org.  Registrants who book a hotel stay outside the CROI housing system may have their registration cancelled and that space given to another qualified applicant.