TRICARE West Phone Number and Customer Service Contacts
The TRICARE West Region main phone number is 888-TRIWEST (888-874-9378) , operated by TriWest Healthcare Alliance. Customer service is available Monday through Friday, 8 a.m. to 6 p.m. in your local time zone. This line handles enrollment, referrals, claims, and general benefit questions.
Quick Facts
| Item | Details |
|---|---|
| Program | TRICARE West Region health coverage |
| Eligibility | Active duty, retirees, Guard/Reserve, and family members in 26 western states |
| Main Phone | 888-TRIWEST (888-874-9378) |
| Hours | Mon-Fri, 8 a.m.-6 p.m. local time (CT, MT, PT, Alaska, Hawaii-Aleutian) |
| Regional Contractor | TriWest Healthcare Alliance |
| Official Agency | Defense Health Agency (DHA) |
| Website | tricare.mil/west |
| Updated For | 2026 |
TRICARE West Main Customer Service Number: 888-874-9378
The main TRICARE West customer service phone number is 888-TRIWEST (888-874-9378) , operated by TriWest Healthcare Alliance. This is the primary contact for all TRICARE West Region beneficiaries. Customer service representatives are available Monday through Friday, 8:00 a.m. to 6:00 p.m. in your local time zone (Central, Mountain, Pacific, Alaska, and Hawaii-Aleutian Time), excluding federal holidays.
Call this number for:
Enrollment, disenrollment, and plan changes
TRICARE Prime and TRICARE Select questions
Referrals and prior authorizations
Claims status and billing issues
Updating payment information
General benefit questions
Finding a TRICARE-authorized provider
TriWest took over as the TRICARE West Region contractor on January 1, 2025, replacing Health Net Federal Services. If you were previously enrolled under Health Net, your coverage transferred automatically. TriWest’s current contract option year runs January 1, 2026, through December 31, 2026.
Important: The DHA has acknowledged that West Region callers have experienced significant hold and resolution times. For faster service, consider using the beneficiary portal at tricare.mil/west or the online chat feature, available Monday through Friday from 8 a.m. to 6 p.m. local time.
Which States Are in the TRICARE West Region?
The TRICARE West Region includes 26 states: Alaska, Arizona, Arkansas, California, Colorado, Hawaii, Idaho, Illinois, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wisconsin, and Wyoming.
If you live in one of these states, TriWest is your regional contractor. If you live in a state not on this list, you are in the TRICARE East Region, administered by Humana Military at 800-444-5445.
TRICARE West Enrollment and Eligibility Contacts
DMDC/DEERS Support Office: 800-538-9552
Veterans May Qualify for Extra Benefits
Check available financial assistance, healthcare programs and other opportunities that may apply to you.
Check EligibilityThe Defense Manpower Data Center (DMDC) manages the Defense Enrollment Eligibility Reporting System (DEERS), which determines TRICARE eligibility. Call 800-538-9552 for benefits support or 800-477-8227 for technical support.
Call DMDC/DEERS to:
Check your TRICARE eligibility status
Update your DEERS record (address, dependents, marital status)
Resolve eligibility-related issues
Confirm Medicare and TRICARE coordination
You can also update DEERS information online through milConnect at milconnect.dmdc.osd.mil.
Beneficiary Portal
The TRICARE West beneficiary portal at tricare.triwest.com allows you to:
View and manage your enrollment
Check referral and authorization status
View claims and Explanation of Benefits
Update payment information
Access the provider directory
Starting August 13, 2026, myAuth will replace the old DS Logon as the digital login for the beneficiary portal. If you encounter portal issues, call 888-TRIWEST (888-874-9378) for assistance.
TRICARE West Pharmacy Phone Numbers
Express Scripts: 877-363-1303
TRICARE beneficiaries nationwide use Express Scripts as the pharmacy benefit administrator. Call 877-363-1303 for all pharmacy questions, including prescriptions by mail, retail pharmacy issues, and formulary questions. For specialty prescriptions, call 877-882-3324.
Express Scripts handles:
Home delivery prescriptions
Retail network pharmacy claims
Specialty medication management
Prior authorization for certain drugs
Prescription cost and copay questions
Deployment Prescription Program: 855-215-4488
For prescriptions related to deployments, call the Deployment Prescription Program at 855-215-4488.
TRICARE West Behavioral Health Contacts
Behavioral Health Appointment Assistance Line: 866-651-4970
TriWest manages a dedicated behavioral health appointment line at 866-651-4970, available Monday through Friday, 8:00 a.m. to 6:00 p.m. Pacific Time. This line helps TRICARE Prime active duty service members and active duty family members find behavioral health providers and schedule outpatient appointments.
Note:Â This is not a crisis line. For emergencies, call 911 or go to the nearest emergency room.
TriWest Behavioral Health Crisis Line: 866-284-3743
For West Region beneficiaries experiencing a behavioral health crisis, call 866-284-3743. This crisis line is available to TRICARE West Region beneficiaries only and is not available to other TRICARE regions.
TRICARE West Claims Submission and Appeals
Claims Address and Fax
For paper claims in the TRICARE West Region, submit to:
TRICARE West Region Claims
P.O. Box 202160
Florence, SC 29502-2160
Fax: 877-989-0070
Download DD Form 2642 (Patient’s Request for Medical Payment) from tricare.mil/PatientResources/Claims/MedicalClaims, complete it, and submit by fax or mail.
Claims Appeals
For claim appeals, submit to:
TRICARE West Appeals
P.O. Box 2130
Virginia Beach, VA 23450
Fax: 866-852-1994
For denied authorization appeals, fax additional documents to 866-852-1919 or mail to TriWest Healthcare Alliance Appeals and Reconsideration Department, P.O. Box 2636, Virginia Beach, VA 23450. Email:Â T5AppealsReconsideration@Triwest.com.
TRICARE West Dental Program Contacts
TRICARE Dental Program: 844-653-4061
The TRICARE Dental Program (TDP) for family members and survivors is administered by United Concordia Companies, Inc. Call 844-653-4061 (CONUS) or 844-653-4060 (OCONUS) for dental enrollment and claims. TDD/TTY: 711.
Active Duty Dental Program: 866-984-2337
Active duty service members use the Active Duty Dental Program (ADDP), also administered by United Concordia. Call 866-984-2337.
TRICARE Retiree Dental Program: 888-838-8737
Retirees and their families can call 888-838-8737 for the TRICARE Retiree Dental Program.
Other Important TRICARE Phone Numbers
| Service | Phone Number | Hours |
|---|---|---|
| MHS Nurse Advice Line | 800-874-2273, Option 1 | 24/7 |
| TRICARE For Life | 866-773-0404 | Mon-Fri, 5 a.m.-10 p.m. CT |
| DMDC/DEERS Benefits Support | 800-538-9552 | Mon-Fri |
| DMDC Technical Support | 800-477-8227 | Mon-Fri |
| TRICARE Pharmacy (Express Scripts) | 877-363-1303 | 24/7 |
| Specialty Pharmacy | 877-882-3324 | Mon-Fri |
| Behavioral Health Appointment Line | 866-651-4970 | Mon-Fri, 8 a.m.-6 p.m. PT |
| Behavioral Health Crisis Line | 866-284-3743 | 24/7 |
| TRICARE West Claims Fax | 877-989-0070 | N/A |
| TRICARE West Appeals Fax | 866-852-1994 | N/A |
MHS Nurse Advice Line: 800-874-2273, Option 1
The Military Health System Nurse Advice Line at 800-874-2273 (800-TRICARE), Option 1, connects you with a registered nurse 24 hours a day, 7 days a week. Nurses can answer urgent care questions and help you decide whether to seek emergency care, schedule an appointment, or use virtual health options. Beneficiaries can connect with a nurse within 30 seconds via phone, web chat, or video conference at mhsnurseadviceline.com.
TRICARE For Life: 866-773-0404
TRICARE For Life (TFL) is Medicare-wraparound coverage for TRICARE-eligible beneficiaries who have Medicare Part A and B. Call 866-773-0404 for TFL questions. TDD: 866-773-0405. Hours: Monday through Friday, 5 a.m. to 10 p.m. Central Time. Wisconsin Physicians Service (WPS) administers TFL claims.
TRICARE West Provider Contacts
Provider Services: 866-690-0885
Healthcare providers with questions about the TRICARE West transition or network participation should contact TriWest at 866-690-0885 or email providerservices@triwest.com. The provider portal is available at tricare.triwest.com/provider.[reference:23]
Claims Payer ID: 99726
For electronic claims submission, the TRICARE West claims payer ID is 99726.
Electronic Claims (WPS): 800-782-2680
Wisconsin Physicians Service (WPS) is TriWest’s partner for electronic claims processing. Contact WPS at 800-782-2680 for electronic data interchange (EDI) assistance.
TRICARE Region Changes and Contractor Transition
TriWest Healthcare Alliance became the TRICARE West Region contractor on January 1, 2025, replacing Health Net Federal Services. Six states moved from the East Region to the West Region: Arkansas, Illinois, Louisiana, Oklahoma, Texas, and Wisconsin.
If you live in one of these six states and were previously enrolled in TRICARE through Humana Military (East Region), your coverage transitioned to TriWest automatically. You did not need to re-enroll during Open Season. If you experienced a disenrollment issue during the transition, you can call TriWest at 888-874-9378 to request reinstatement.
Common Mistakes When Contacting TRICARE West
Calling the East Region number. If you live in the West Region, call TriWest at 888-874-9378, not Humana Military at 800-444-5445. Check the state list above to confirm your region.
Not having your DOD Benefits Number ready. Your DOD Benefits Number (found on your ID card) or Social Security number speeds up verification.
Calling the behavioral health appointment line for a crisis. The 866-651-4970 line is for routine appointments. For a crisis, call 866-284-3743 or 911.
Submitting claims to the wrong address. West Region claims go to P.O. Box 202160, Florence, SC 29502-2160. East Region claims go to a different address.
Expecting 24/7 phone service. The main TriWest line is available 8 a.m. to 6 p.m. local time, Monday through Friday. The Nurse Advice Line and Behavioral Health Crisis Line are the 24/7 options.
Common Questions
What is the TRICARE West customer service phone number?
Call 888-TRIWEST (888-874-9378) , Monday through Friday, 8 a.m. to 6 p.m. in your local time zone. This number handles enrollment, referrals, claims, and general benefit questions.
Who is the TRICARE West Region contractor?
TriWest Healthcare Alliance is the TRICARE West Region contractor, effective January 1, 2025. TriWest replaced Health Net Federal Services and also serves six states that moved from the East Region.
How do I check my TRICARE West enrollment status?
Log in to the beneficiary portal at tricare.triwest.com or call 888-874-9378. You can also check DEERS eligibility by calling 800-538-9552.
What is the TRICARE West pharmacy phone number?
Express Scripts handles TRICARE pharmacy benefits at 877-363-1303. For specialty prescriptions, call 877-882-3324.
What is the TRICARE West behavioral health crisis line?
Call 866-284-3743 for behavioral health crises. This line is for West Region beneficiaries only and is available 24/7. For routine appointments, call 866-651-4970.
Where do I mail TRICARE West claims?
Mail paper claims to TRICARE West Region Claims, P.O. Box 202160, Florence, SC 29502-2160. Fax: 877-989-0070.
How do I appeal a TRICARE West claim denial?
Mail appeals to TRICARE West Appeals, P.O. Box 2130, Virginia Beach, VA 23450, or fax to 866-852-1994. For denied authorizations, fax to 866-852-1919.
What is the TRICARE nurse advice line number?
Call 800-874-2273 (800-TRICARE), Option 1. A registered nurse is available 24/7 to answer urgent care questions and help you decide where to seek care.
Which states are in the TRICARE West Region?
The West Region includes 26 states: Alaska, Arizona, Arkansas, California, Colorado, Hawaii, Idaho, Illinois, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wisconsin, and Wyoming.
How do I find a TRICARE West provider?
Use the provider directory at tricare.mil/west or the beneficiary portal. You can also call 888-874-9378 for provider assistance.
What is the TRICARE West dental phone number?
Call 844-653-4061 (CONUS) for the TRICARE Dental Program. Active duty members call 866-984-2337 for the Active Duty Dental Program. Retirees call 888-838-8737.
Can I chat with TRICARE West customer service online?
Yes. Customer service representatives are available via chat in the beneficiary portal Monday through Friday from 8 a.m. to 6 p.m. local time.
Key Takeaways
The TRICARE West main phone number is 888-TRIWEST (888-874-9378) , operated by TriWest Healthcare Alliance.
Customer service hours are Monday through Friday, 8 a.m. to 6 p.m. local time.
The Nurse Advice Line at 800-874-2273, Option 1 is available 24/7 for urgent care guidance.
The Behavioral Health Crisis Line is 866-284-3743, available 24/7 for West Region beneficiaries.
Express Scripts at 877-363-1303 handles all TRICARE pharmacy benefits.
Paper claims go to P.O. Box 202160, Florence, SC 29502-2160; fax 877-989-0070.
DMDC/DEERS at 800-538-9552 manages TRICARE eligibility and enrollment records.
TriWest replaced Health Net as the West Region contractor on January 1, 2025.
The West Region includes 26 states, including Texas, California, and six states that moved from the East Region in 2025.
You can manage enrollment and claims online through the beneficiary portal at tricare.triwest.com.
Official Resources
TRICARE West Region:Â tricare.mil/west
TRICARE Contact Information:Â tricare.mil/CallUS
TRICARE West Beneficiary Portal:Â tricare.triwest.com
TRICARE Claims:Â tricare.mil/PatientResources/Claims
TRICARE Pharmacy Program:Â tricare.mil/pharmacy
DMDC/DEERS Support:Â tricare.mil/deers
MilConnect:Â milconnect.dmdc.osd.mil
TRICARE For Life:Â tricare.mil/tfl
🇺🇸 IMPORTANT DISCLAIMER – Veterans Benefits Information
This site provides general information about U.S. Department of Veterans Affairs (VA) benefits for educational and informational purposes only.
- Not Official: We are NOT affiliated with, endorsed by, or connected to the U.S. Department of Veterans Affairs (VA), the Veterans Benefits Administration (VBA), the Veterans Health Administration (VHA), or any other government agency.
- No Legal/Financial Advice: The content on this website is for informational purposes only and does not constitute legal, financial, or medical advice. VA benefits rules change frequently – always consult with an accredited Veterans Service Officer (VSO) or a qualified professional for your specific situation.
- Official Sources: For official, binding information and to apply for benefits, always visit official .gov websites: VA.gov, Benefits.VA.gov, or SSA.gov.
- No Data Collection: This site does not collect, store, or process any personal information. It does not have login forms, contact forms, or any system to capture user data. We never ask for your Social Security Number, bank details, or any personal information.
- 🚨 Scam Alert: The VA and other government agencies never charge fees for benefit applications. If anyone asks for money to "process" your VA claim, it is a scam. Report it to the VA Office of Inspector General at VA.gov/OIG.
- Advertising: This site uses third-party advertising (Adsterra) to cover operational costs. We do not endorse or guarantee any products or services advertised.
📌 Information provided as of June 2026. Always verify current eligibility and rules with official .gov sources.
This site is not affiliated with the U.S. Department of Veterans Affairs or any government agency. All information is for educational purposes only. Please visit VA.gov for official information.
