Welcome to CROI 2020 Registration and Housing


Start Here

To begin a new application* or to complete the registration and housing process for preapproved applicants** (ie, invited speakers, authors on accepted abstracts and research collaborators, scholarship recipients, and other preapproved applicants), please enter your information below.

* New Applications – The email should be the direct institutional email address of the applicant. This is important because peri- post- conference notifications must go to the recipient (for example, certificates, evaluations, etc), and not to assistants, travel agents, etc. This email address will become your unique identifier.

* Preapproved Applicants – You must use the same email address as in your invitation email. This email address is your unique identifier.


(use initial Capitals eg, John or Marie)
(use initial Capitals eg, Smith or Jones)
(should not be from a public domain like @gmail, @yahoo, @aol, etc)

Modify Existing Approved Application/Registration/Hotel

To make changes to your existing approved application, registration or hotel reservation, please enter your Reference Number, found in your confirmation email. Please contact the registration and housing partner SPARGO, Inc. via email CROIregistration@spargoinc.com for assistance if you do not have your Reference Number.


For questions about the registration or hotel reservation systems, please contact the registration and housing partner SPARGO, Inc.:

Stay Connected to IAS–USA

For general questions about the Conference, please contact IAS–USA via:

Email: CROIinfo@iasusa.org
Phone: 415-544-9400 M-F 8:30 am - 5:30 pm (Pacific Time)
FAQ: CROIconference.org/frequently-asked-questions#registration

Contact SPARGO, Inc. by Phone/Fax/Email

Phone: 001-571-549-4511 (International) or 1-833-229-0649 (within the United States)
Fax: 703-574-8332
Email: CROIregistration@spargoinc.com,
CROIHousing@spargoinc.com
Customer service hours: M-F 8:30 am - 5:00 pm (Eastern Time)

By Mail

CROI Registration and Housing Center
11208 Waples Mill Rd
Suite 112
Fairfax, VA 22030