Your User ID is 10 digits long. It never changes. It's the phone number from your first order, with the area code first, and no spaces or dashes between numbers.
Example:
Phone:    (555) 123-4567
User ID:   5551234567

If you have any problems or questions, please contact us.
You can also request your password by emailing us at remindme6@bestbuydental.com, or using the form on the contact us page to request your password.