What biometric information is collected from a USMLE® candidate?

The biometric record contains some or all of the following information: a digitized representation of your fingerprint (the template), an image of your fingerprint, along with your name, address, telephone number (if provided), date of birth or age, identification document number, and a scanned copy of your identification document (such as your driver’s license), which includes your digitized photograph. The biometrics record is paired with ID information and information about your testing appointment session.

Source: http://www.usmleworldwide.com/blog/?p=109