DEERS – the Defense Enrollment Eligibility Reporting System – is a database of active duty and retired service members, their family members, and others who are eligible for TRICARE. TRICARE eligibility shows up in DEERS based on the sponsor’s status. It’s essential to keep your DEERS record up to date to get timely communication and updates regarding your TRICARE benefits.

Beneficiary information must be correct and up-to-date in DEERS to ensure that:

• A beneficiary can maintain access to their medical benefits
• A beneficiary’s healthcare team and TRICARE can reach them with critical healthcare, authorization, claims, and enrollment information

Beneficiaries need to update DEERS as soon as possible anytime they move, change contact information, or experience a Qualifying Life Event (QLE).

A beneficiary must update DEERS whenever they experience the following (this list is not all-inclusive):

• Change in sponsor’s status
• Retiring or separating
• Activating or deactivating
• Having a baby or adopting
• Moving to a new location for any reason
• Change in a student’s full-time enrollment status
• Becoming eligible for Medicare
• Death of sponsor or family member

If a beneficiary is enrolled in any TRICARE plan (e.g., TRICARE Prime, TRICARE Select, TRICARE Reserve SelectA premium-based plan for qualified Selected Reserve members and their families.TRICARE Reserve Select, TRICARE Retired Reserve or TRICARE Young Adult), remind them to also change their address and other personal information with their regional contractor.

Adding or Removing Family Members

• Only sponsors can add or remove family members:
  • Go to a local ID card office.
  • Call first to verify business hours or to set up an appointment.
  • Or, set up an appointment online.

Updating Your Contact Information

• Contact information includes your address, email addresses or phone number(s). Note: Addresses must be a physical address; P.O. boxes can’t be used.
• Family members can update contact information after they’re registered in DEERS.
  • Log into milConnect
  • Call 1-800-538-9552 (TTY/TDD: 1-866-363-2883)
  • Fax updates to 1-800-336-4416 (Primary) or 1-502-335-9980 (Alternate)
  • Mail updates to:
    Defense Manpower Data Center Support Office
    Attn: COA
    400 Gigling Road
    Seaside, CA  93955-6771

For more information and resources on updating DEERS, check out the Defense Enrollment Eligibility Reporting System page at https://www.tricare.mil/deers. You can also find information on Qualifying Life Events at https://www.tricare.mil/lifeevents.