Defense Enrollment Eligibility Reporting System

Database of all individuals eligible for military benefits.

The Defense Enrollment Eligibility Reporting System (DEERS) is a computerized database that contains information about all individuals who are entitled to TRICARE and other military benefits. DEERS enrollment is absolutely essential—you cannot use TRICARE benefits without being registered in DEERS.

What DEERS tracks: • Service member information and status • Family member relationships and demographics • Benefit eligibility periods • Coverage status and history • Contact information

Who must be in DEERS: • All service members (automatically enrolled) • All family members seeking benefits • Surviving family members • Former spouses with benefit eligibility

How to update DEERS: • Visit an ID card office (Rapids site) • Call 1-800-538-9552 • Update online through milConnect for some changes • Submit documentation for life events (marriage, birth, divorce)

Important: You must update DEERS within 90 days of qualifying life events to avoid gaps in coverage. Keep information current, especially addresses and contact details, to ensure uninterrupted benefits and communication.