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Scheduled Maintenance: CDAS will be undergoing maintenance on Saturday, February 7th from 7:30 AM to 9:30 AM U.S. Eastern Standard Time for updates to the website. During this time you may experience intermittent downtime.

Register for CDAS

The National Institutes of Health (NIH) has implemented new IT security requirements to improve data security. This mandate includes integration of identity verification into NIH IT applications. On March 3, 2026, you will be required to verify your identity in order to access CDAS.

Before you can log in to CDAS, you must have established your login credentials (username and password) at an authorized login service listed on the Log In page. If you are not NIH staff and do not have login credentials, then you must register at either ID.me or Login.gov.