Defense Enrollment and Eligibility Reporting System

Defense Enrollment Eligibility Reporting System (DEERS) is a computerized database for United States Service members, retirees, dependents, DoD active Contractors, and others worldwide who are entitled to Public Key Infrastructure and TRICARE eligibility.

DEERS is used in the Real-Time Automated Personnel Identification System (RAPIDS). RAPIDS is United States Department of Defense system to issue the definitive credential within DoD for obtaining Common Access Card tokens in the DoD PKI. Used together, these two systems are referred to as a DEERS/RAPIDS stations, available in 700 locations in the world.

History
DEERS was created in the late 1970s as a Joint Medical/Personnel Database, and first put into operation in 1982. In 1997, DEERS fielded RAPIDS. In 2001, it implemented the National Enrollment Database, which provided medical portability. The Next Generation of TRICARE Contracts (TNEX), including additional DEERS capabilities, was created in 2004.

Mission
DEERS maintains personnel and benefits information for:
 * Active, retired, and reserve uniformed service personnel
 * Eligible family members of active, retired, and reserve uniformed service personnel
 * DoD civil service personnel
 * DoD contractors requiring logical access

DEERS is also responsible for producing DoD ID Cards (RAPIDS and Common Access Cards). DEERS supports benefit delivery including medical, dental, educational, and life insurance. In addition, DEERS enables DoD e-business, including identity management, and reduces fraud and abuse of government benefits and supports force health protection and medical readiness.

Electronic data interchange personal identifier
An electronic data interchange personal identifier, or EDIPI, is a unique number assigned to a record in the United States Department of Defense's Defense Enrollment and Eligibility Reporting System (DEERS) database. A record in the DEERS database is a person plus personnel category (e.g. contractor, reservist, civilian, active duty, etc.). The Common Access Card (CAC), which is issued by the Department of Defense through DEERS, has an EDIPI on the card. A person with more than one personnel category is issued a CAC for each role, but the EDIPI will remain the same for all CACs issued to that individual. Separating the identities is done so that revocation of one role’s permission can be accomplished simply by commandeering the card and/or revoking the digital certificates without affecting the other roles.

The EDIPI is a ten-digit number located in the barcode on the back of the card and in the integrated circuit chip embedded in the card itself. The first 9 digits are assigned unique numbers with the 10th digit being a check digit for the identifier.

The EDIPI can be used as a unique person identifier. It is unique to a person not to the person's role or CACs issues to that person.