TRICARE Referrals, Prior Auth, and Regions: East vs West and the POS Trap
Almost every expensive TRICARE surprise traces back to one of three things: you are talking to the wrong regional contractor, you got specialty care without the referral your plan required, or you missed a window nobody reminded you about. The costliest of those is the point-of-service option — a $300 deductible and 50 percent of the allowable charge that, uniquely, does not count toward your catastrophic cap. It has no ceiling.
Educational guide built from TRICARE public documentation. For emergencies use 911 or the nearest emergency department; for urgent clinical questions use the Nurse Advice Line, not portal troubleshooting. Last verified: August 26, 2026.
How to handle TRICARE Portals
Confirm your region — it may have changed under you
There are three regions. East is run by Humana Military (800-444-5445), West by TriWest Healthcare Alliance (888-874-9378), and Overseas by International SOS. On January 1, 2025, six states moved from East to West: Arkansas, Illinois, Louisiana, Oklahoma, Texas, and Wisconsin. Beneficiaries in those states changed both region and contractor without moving house.
Learn the difference between a referral and a prior authorization
TRICARE defines them separately. A referral is your primary care manager sending you to another provider for care they do not provide. A prior authorization is your regional contractor approving that care before the appointment. They often happen together, but one does not imply the other, and each can fail on its own.
Work out which rules your specific plan imposes
Active duty on Prime need a referral for anything the PCM does not provide and prior authorization for all specialty care — care without a referral is paid out of pocket. Non-active-duty Prime need referrals for specialty care and some diagnostics, plus prior authorization for all specialty care. Everyone else — Select, Reserve Select and the rest — needs no referral except for applied behavior analysis, but still needs prior authorization for adjunctive dental, ABA, home health, hospice, transplants, and Extended Care Health Option services.
Understand exactly what the point-of-service option costs
If you are on Prime and not active duty, seeing a provider without the required referral drops you into the point-of-service option: a $300 individual or $600 family deductible, then 50 percent of the TRICARE-allowable charge, plus whatever a non-network provider bills above that. It does not apply to active duty service members.
Know the accidental trigger
TRICARE names it explicitly: you can fall into point-of-service by seeing a network provider in ANOTHER REGION without a referral from your PCM. In-network is not enough. The provider being perfectly legitimate is not enough. Travel, a PCS in progress, and college-age dependents living out of region are where this bites.
Read the authorization letter as a contract
Approved care arrives with an authorization letter carrying a named provider, an expiration date, a number of visits, and a specific covered service. Every one of those is a boundary. Extra visits, a different provider in the same practice, or care after the expiration date can all fall outside the approval.
File claims inside one year
If you file your own claims, the deadline is one year from the date of medical service, the date of discharge for inpatient care, or the date you received the medication. Providers face the same one-year limit. TRICARE denies claims received after it.
Track your 90-day QLE window and Open Season
A qualifying life event — marriage, birth, retirement from active duty — opens a 90-day window to make enrollment changes. Whenever you file inside that window, coverage starts on the date of the QLE itself. Open Season runs from the Monday of the second full week in November to the Monday of the second full week in December.
Fix DEERS before you argue with the contractor
Eligibility lives in DEERS, not with the regional contractor. If DEERS shows the wrong sponsor status, address, or plan enrollment, the contractor often cannot fix the real problem no matter how long the call runs. Verify DEERS first, then re-open the ticket.
The problems people actually search for
I got a huge bill and I was in-network.
Usually means: Point-of-service. Most likely you saw a network provider in another region without a referral, or specialty care on Prime without one.
Move: Pull the referral history and the claim. If a referral existed but was not attached, the contractor can reprocess. If none existed, ask about a retroactive referral immediately — the odds fall fast with time.
I hit my catastrophic cap but I am still being billed.
Usually means: The charges are point-of-service. TRICARE excludes POS fees from the catastrophic cap.
Move: Confirm on the explanation of benefits whether the amounts are coded POS. If they are, the cap will never absorb them — the only remedy is fixing the underlying referral.
The contractor says I am not theirs.
Usually means: Region change. Six states moved East to West on January 1, 2025 and beneficiaries switched from Humana Military to TriWest.
Move: Confirm your region by ZIP, then call the correct contractor: Humana Military 800-444-5445 for East, TriWest 888-874-9378 for West.
My referral was approved but the visit was denied.
Usually means: The care went outside the authorization letter — expired, wrong provider, or more visits than approved.
Move: Compare the letter against the claim line by line: provider name, date, service code, visit count. Request an extension or amendment rather than appealing the denial cold.
My claim was denied for timely filing.
Usually means: It arrived more than one year after the date of service.
Move: The only route left is the administrative-error exception, and it requires filing within 90 calendar days of being notified of the error. Ask for that notification in writing and file immediately.
I retired and lost coverage without warning.
Usually means: The 90-day QLE window closed without an enrollment.
Move: Contact the contractor immediately about options. Until enrolled, care is space-available only at a military hospital or clinic.
Where people usually get stuck
In-network, but in another region and without a PCM referral — full POS applies.
Assuming the catastrophic cap limits every cost.
Living in AR, IL, LA, OK, TX or WI and still dealing with Humana Military.
Extra visits or a different provider in the same practice.
Self-filed claims sitting in a drawer.
No enrollment inside 90 days of leaving active duty.
Build the proof packet before you escalate
- Region and contractor, confirmed by ZIP code, with the date you confirmed it.
- Referral: requesting PCM, date, specialty, and referral number.
- Authorization letter: provider name, approved service, visit count, and expiration date.
- The explanation of benefits, with any point-of-service coding highlighted.
- Claim: date of service, date filed, and the denial reason verbatim.
- DEERS screenshot showing sponsor status, plan enrollment, and address.
- QLE: the event date and the date you submitted the enrollment change.
Things that make the problem worse
Who can actually fix it
Humana Military (East Region)
800-444-5445. Referrals, authorizations, claims, and network questions for the East Region.
TriWest Healthcare Alliance (West Region)
888-874-9378. Same functions for the West Region, including the six states that transferred on January 1, 2025.
International SOS (Overseas)
Overseas region referrals, authorizations, and claims.
DEERS / ID card office
Eligibility, sponsor status, dependent records, and address — fix here before disputing coverage.
Your PCM or MTF referral management
Referral issuance, retroactive referrals, and clinical justification.
Beneficiary Counseling and Assistance Coordinator (BCAC)
When the contractor and the MTF disagree, or an appeal needs a neutral advocate.
Copy/paste messages that get cleaner answers
Disputing a point-of-service charge
I am disputing a point-of-service determination. Beneficiary: [name / DoD ID last four] Plan: [Prime / Prime Remote / other] Region and contractor: [East-Humana / West-TriWest / Overseas] Date of service: [date] Provider: [name and location] Claim number: [number] My understanding is that a referral [was issued on (date) by (PCM) / was not issued]. If a referral exists, please confirm whether it was attached to this claim and reprocess. If it does not, please tell me whether a retroactive referral is possible and what my PCM needs to submit. Please also confirm in writing whether these charges are excluded from my catastrophic cap.
Requesting an authorization amendment
I need an existing authorization amended before care continues. Beneficiary: [name / DoD ID last four] Authorization number: [number] Approved provider: [name] Approved visits: [count] Expiration date: [date] What I need: [additional visits / different provider in the same practice / extension past the expiration date] Clinical reason: [reason, from the provider] Please confirm what the provider must submit and the expected turnaround, so care does not occur outside the authorization.
Timely-filing exception request
I am requesting the administrative-error exception to the one-year filing deadline. Beneficiary: [name / DoD ID last four] Date of service: [date] Provider: [name] Claim number: [number] The failure to file within one year resulted from [describe the administrative error]. I was notified of this error on [date]. I am submitting within 90 calendar days of that notification. Please confirm receipt and tell me what additional documentation of the error you require.
Fast answers
Which TRICARE region am I in?
East is Humana Military, West is TriWest Healthcare Alliance, Overseas is International SOS. On January 1, 2025 six states moved from East to West: Arkansas, Illinois, Louisiana, Oklahoma, Texas, and Wisconsin. Confirm by ZIP code rather than memory.
What does the point-of-service option actually cost?
A $300 individual or $600 family deductible, then 50 percent of the TRICARE-allowable charge, plus any amount a non-network provider bills beyond it. It applies to Prime beneficiaries who are not active duty and who got care without a required referral.
Do point-of-service charges count toward my catastrophic cap?
No. TRICARE states POS fees do not apply to the annual catastrophic cap. That makes it the one cost in the benefit with no effective ceiling.
How do I accidentally trigger point-of-service?
The most common way TRICARE names is seeing a network provider in another region without a referral from your primary care manager. Being in-network is not sufficient.
What is the difference between a referral and a prior authorization?
A referral is your PCM sending you to another provider for care they do not provide. A prior authorization is your regional contractor approving that care before the appointment. You may need both.
How long do I have to file a claim?
One year from the date of service, the date of inpatient discharge, or the date you received the medication. Claims after that are denied. If an administrative error caused the delay, you may file within 90 calendar days of being notified of the error.
How long is the window after a qualifying life event?
90 days. Coverage starts on the date of the QLE regardless of when inside that window you file. Miss it after retiring from active duty and you lose coverage, leaving space-available care only.
When is TRICARE Open Season?
From the Monday of the second full week in November to the Monday of the second full week in December. If you are eligible and want to keep your current plan, you do not need to act.