The Member ID is a number assigned to the Subscriber. In most cases, the Member ID is the same as the subscriber's Social Security Number (SSN).
Some groups elect to assign an alternate Client Assigned Identification number (CAID), to their members; if this is your case, use that assigned number.
You may use either your subscriber SSN or CAID (if assigned) to register for Consumer Toolkit or to identify yourself as an enrollee when you visit your dentist.
Registering for Consumer Toolkit
Signing on to Consumer Toolkit