WASHINGTON STATE CONVENTION CENTER Seattle, Washington March 4–7, 2019

Welcome to CROI 2019 Registration and Housing


Log into Portal

To begin a new application, please enter your information.

Invited participants, authors on accepted abstracts and research collaborators, scholarship recipients, and approved applicants may register to attend CROI, using the same email address as in your invitation email.


(use initial Capitals eg, John or Marie)
(use initial Capitals eg, John or Marie)
(should not be from a public domain like @gmail, @yahoo, @aol, etc)
Please note that this email must be the direct email for the applicant. This is required because peri- post- conference notifications must go to the recipient (for example, certificates, evaluations, etc)

Modify Application/Registration/Housing

To make changes to your existing registration, application, or hotel reservation, please enter your 6-digit reference number found in your conference 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 technical questions with regard to the registration process or hotel reservations, please contact the registration and housing partner (SPARGO, Inc.):

By Mail

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

By Phone/Fax/Email

Phone: 833-229-0649 (International) or 703-449-6418 (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)

Stay Connected to IAS-USA

For questions with regard to the Conference, please contact IAS-USA via email - CROIinfo@iasusa.org