An official website of the United States government
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

News | July 18, 2023

TRICARE Q&A: Managing Your DEERS Record

By TRICARE Communications

Has it been a while since the last time you checked your Defense Enrollment Eligibility Reporting System (DEERS) record? If so, take a moment to log in to ID Card Office Online (IDCO) to make sure your information is up to date. This includes changes in your military status, contact information, and family status (marriage, divorce, births).
 
“It’s a good idea to check your DEERS record every so often to ensure all information is correct,” said Dr. Danita Hunter, chief of TRICARE Policy and Programs. “Information that’s incorrect or missing in your DEERS record can cause problems with TRICARE and other military benefits.”
 
Read on to learn how to maintain your DEERS record and why it’s important to do so.
 
Q: Who should be registered in DEERS?
A: Sponsors, their family members, and others who are eligible for TRICARE benefits must be registered in DEERS.
 
How you’re added to DEERS depends on who you are. Service members—active duty, National Guard and Reserve, and retired service members—are automatically registered as sponsors based on information from their personnel systems. If you’re a sponsor, you must register your family members by visiting a RAPIDS ID Card Office. Family members can’t receive TRICARE benefits until their information is in DEERS.
 
Q: Who can check their DEERS records?
A: Anyone age 18 or older can log in to IDCO to view their own information. In most cases, sponsors can also view information for eligible family members. Family members can only view their own information.

Q: How do I log in to DEERS?
A: You can use a Common Access Card or Defense Self-Service Logon (DS Logon) to log in. If you need help with DS Logon or need a new account, visit DS Logon.
 
Q: What information can I see in my DEERS record?
A: You can use IDCO to view:
  • Personal information, including your Social Security number, date of birth, and marital status
  • Contact information such as your address, phone number, and email address
You can use milConnect to view:
  • Benefit information, including medical, dental, and pharmacy enrollment and eligibility
  • Personnel and service-related data if you’re a sponsor
Q: Why do I need to keep my DEERS record up to date?
A: Keep DEERS up to date so you and your family can use your TRICARE benefits. Errors in DEERS can cause problems with claims, authorization letters for referrals, and getting prescriptions.

An outdated DEERS record can also cause you to miss enrollment deadlines. For example, if you don’t update DEERS within 90 days of having a Qualifying Life Event (QLE), you might not have another opportunity to make enrollment changes until the next TRICARE Open Season.
 
Q: When should I update my DEERS record?
A: Update your DEERS record as soon as any information changes or if you or a family member has a QLE. As described in the TRICARE Qualifying Life Events Fact Sheet, QLEs include moving, getting married or divorced, having or adopting a child, gaining or losing other health insurance, and changes in the sponsor’s status (including activation or retirement). If you enroll in Medicare, you should also check your DEERS record to make sure Medicare enrollment is part of your current record.
 
Q: How do I update my contact information in DEERS?
A: Sponsors and family members can update contact information by using one of these options:
  • Online: Log in to IDCO or milConnect
  • Phone: 1-800-538-9552 (TTY/TDD: 1-866-363-2883)
  • Fax: 1-800-336-4416
  • Mail: Defense Manpower Data Center Support Office
    Attention: COA
    400 Gigling Rd.
    Seaside, CA 93955-6771
Be sure to update contact information for each family member, if applicable.
 
Q: How do I add, change, or terminate other data in DEERS?
A: Active duty sponsors who need to change personnel or personal data in DEERS must follow their service branch’s personnel procedures. You can update some information through IDCO. You may need to make other updates and corrections by contacting the nearest RAPIDS ID Card Office. The required documents you should bring vary based on the type of change you need to make.
 
If a sponsor isn’t available, family members should contact their nearest RAPIDS ID Card Office.
 
Q: Who can I contact if I need help with DEERS?
A: You can call the DMDC/DEERS Support Office at 1-800-538-9552 (TTY/TDD: 1-866-363-2883) if you need help with your DEERS information. If you have benefit or enrollment questions, call your TRICARE regional contractor before contacting DEERS.
 
Remember to keep your DEERS record up to date and refer to these Q&As to help you do so.

Would you like the latest TRICARE news sent to you by email? Visit TRICARE Subscriptions, and create your personalized profile to get benefit updates, news, and more.
A man and woman standing on a beach

Retirement changes your TRICARE coverage: Learn ...

News
Jan. 22, 2026

Are you getting ready to retire from active duty or the National Guard or Reserve? You should know there are...
Read More
Smiling woman sits at a table while holding her glasses.

What are my 2026 TRICARE For Life costs?

News
Jan. 20, 2026

Did you know that Medicare Part A and Part B costs change each year on Jan. 1? If you have TRICARE For Life or...
Read More
Icons of blue and yellow hands interlocked. Text reads: "Your Safety. Your Comfort. Your Choice." DHA logo and TRICARE logo.

Your safety, your comfort, your choice: Requesti...

News
Jan. 15, 2026

When you get care at a military hospital or clinic, your safety, comfort, and privacy are top priorities. The...
Read More
Woman wearing blouse looks at smartphone. Text reads: "Your Health Results, Sooner. Get your lab results, radiology reports, pathology findings, clinical notes, and other test results as soon as they're ready in the MHS GENESIS Patient Portal. Results may appear before your provider has a chance to review them. Your provider will contact you with anything that requires urgent, sensitive, or time-critical follow up." MHS GENESIS logo. Footnote: "MHS GENESIS is a registered trademark of the Department of Defense, Defense Health Agency. All rights reserved."

Get your health results faster in 2026: Lab and ...

News
Jan. 13, 2026

Do you get care at a military hospital or clinic? Starting Jan. 20, you’ll be able to access lab results,...
Read More
Uniformed service member stores medications at pharmacy

Make the most of your TRICARE pharmacy benefit i...

News
Jan. 08, 2026

The TRICARE Pharmacy Program helps you get the prescription drugs you need in a safe, easy, and affordable...
Read More
Man in orange shirt reads papers while he sits at a desk

TRICARE-allowable charges and balance billing: W...

News
Jan. 06, 2026

You may have heard the terms “allowable charge” and “balance billing.” But what do these terms mean when you...
Read More
Elderly woman wearing floral shirt, earrings, and glasses smiles at the camera

Have TRICARE For Life? Here's what to do if you ...

News
Dec. 31, 2025

Are you planning to move soon? Whether you’re moving across town or overseas, TRICARE For Life moves with you...
Read More
Woman in a wedding dress puts a ring on a man's hand

Getting married? Here’s what you need to know ab...

News
Dec. 22, 2025

Getting married is an exciting milestone in your life! It’s also a time when many changes come along,...
Read More

Jan. 22, 2026

Retirement changes your TRICARE coverage: Learn what to do if you’re retiring in 2026

Are you getting ready to retire from active duty or the National Guard or Reserve? You should know there are some steps to take to ensure your TRICARE coverage continues as you make the transition to civilian life. This article explains what you need to do to keep your TRICARE benefit in retirement.

Jan. 20, 2026

What are my 2026 TRICARE For Life costs?

Did you know that Medicare Part A and Part B costs change each year on Jan. 1? If you have TRICARE For Life or you’ll become eligible for Medicare this year, now is a good time to review these costs.

Jan. 15, 2026

Your safety, your comfort, your choice: Requesting chaperones at military hospitals and clinics

When you get care at a military hospital or clinic, your safety, comfort, and privacy are top priorities. The Defense Health Agency recently published its chaperone policy across all military hospitals and clinics worldwide. You can request a chaperone for any physical exam or medical or dental visit.

Jan. 13, 2026

Get your health results faster in 2026: Lab and test results immediately available in your MHS GENESIS Patient Portal

Do you get care at a military hospital or clinic? Starting Jan. 20, you’ll be able to access lab results, radiology reports, pathology reports, and clinical notes immediately through the MHS GENESIS Patient Portal.

Jan. 8, 2026

Make the most of your TRICARE pharmacy benefit in 2026

The TRICARE Pharmacy Program helps you get the prescription drugs you need in a safe, easy, and affordable way. Express Scripts administers the TRICARE pharmacy benefit and offers tools to help you manage your prescriptions.

Jan. 6, 2026

TRICARE-allowable charges and balance billing: What you need to know

You may have heard the terms “allowable charge” and “balance billing.” But what do these terms mean when you have TRICARE? This article explains the different types of TRICARE-authorized providers and what they’re allowed to charge you.

Dec. 31, 2025

Have TRICARE For Life? Here's what to do if you move

Are you planning to move soon? Whether you’re moving across town or overseas, TRICARE For Life moves with you.

Dec. 22, 2025

Getting married? Here’s what you need to know about your TRICARE benefit

Getting married is an exciting milestone in your life! It’s also a time when many changes come along, including changes to your health coverage. Whether you’re a service member, a retiree, or marrying someone who is, it’s important to understand how marriage can affect your TRICARE eligibility and coverage.

Dec. 17, 2025

Floss daily for a healthier smile

While you brush your teeth every day, that’s only part of good dental care. Your toothbrush misses the tight spaces between your teeth where plaque builds up, and decay can take hold. Flossing fills this gap by getting into those hard-to-clean places. When you floss correctly, you remove harmful plaque and protect your gums from disease. This guide shows you the right way to floss so you can maintain a healthy smile.

Dec. 17, 2025

TRICARE Dental Program orthodontic coverage: What you need to know

Do you or your child need braces? Do you wonder if the TRICARE Dental Program covers orthodontic care? Here’s what you need to know about getting straighter teeth through the TRICARE Dental Program.