TRICARE prior authorization for addiction treatment
Before TRICARE pays for residential rehab, PHP, or IOP, the treatment facility must request and receive approval. This is called prior authorization. Here is what it means, how it works, how long it takes, and what happens if it is denied.
What prior authorization is
Prior authorization is a pre-approval process. Before TRICARE will pay for certain levels of addiction treatment, the treatment facility must submit clinical information to TriWest showing that the requested level of care is medically necessary for you. TriWest reviews the documentation and either approves, modifies, or denies the request.
Authorization does not mean TRICARE will automatically pay the full claim. It means TRICARE agrees, based on the information provided at the time of the request, that the level of care is appropriate. Actual payment still depends on eligibility, network status, correct billing, and other factors.
San Antonio is in the TriWest region
TriWest Healthcare Alliance is the TRICARE contractor for the West region, which includes San Antonio and all of Texas. When your facility submits a prior authorization request, they are submitting it to TriWest, not directly to TRICARE. Contact TriWest at triwest.com or 1-888-TRIWEST (1-888-874-9378) for authorization status.
Which levels of care require prior authorization
Authorization requirements vary by plan type. The table below reflects general TRICARE policy. Always confirm your specific plan's requirements at tricare.mil before beginning treatment.
| Level of care | TRICARE Prime | TRICARE Select | Reserve Select |
|---|---|---|---|
| Medical detox | Required | Required | Required |
| Residential inpatient | Required | Required | Required |
| Partial hospitalization (PHP) | Required | Required | Required |
| Intensive outpatient (IOP) | Required | Varies | Varies |
| Standard outpatient | Generally not required | Generally not required | Generally not required |
Requirements change. Verify your specific plan at tricare.mil/GettingCare/Auth before relying on this table.
How the prior authorization process works
In most cases the treatment facility handles the prior authorization request on your behalf as part of the admissions process. You should not need to submit it yourself. Here is the typical sequence:
Benefits verification
Before submitting an authorization request, the facility calls TriWest to verify your eligibility, plan type, and benefit details. Ask the admissions coordinator to confirm this has been completed and to share what they found.
Clinical assessment
A licensed clinician assesses your substance use history, current condition, and any co-occurring mental health conditions. This assessment produces the medical necessity documentation that TriWest requires to evaluate the request.
Facility submits the request to TriWest
The facility submits the clinical documentation to TriWest along with the requested level of care, estimated length of stay, and treatment plan. This is typically done electronically through TriWest's provider portal.
TriWest reviews and decides
TriWest reviews the documentation against TRICARE's medical necessity criteria. Standard decisions typically take 3 to 5 business days. Urgent requests, where a delay would jeopardize health, must be decided within 24 hours per TRICARE policy.
Authorization issued or denied
If approved, TriWest issues an authorization number. Ask the facility for this number and keep a record of it. If denied, you have the right to appeal. See the section below and our full denial and appeal guide.
Continued authorization during treatment
Most residential authorizations cover an initial period, commonly 7 to 14 days. After that, the facility submits updated clinical notes to request continued authorization. This is called utilization review. Your treatment team manages this process throughout your stay.
Authorization timelines
TRICARE sets maximum decision timeframes by request type. These are policy maximums, not typical wait times -- many requests are decided faster.
Standard requests: up to 3 to 5 business days
Most non-urgent prior authorization requests for residential or PHP treatment are processed within 3 to 5 business days of receiving a complete submission from the facility.
Urgent requests: within 24 hours
If a delay in authorization would seriously jeopardize your health, life, or ability to regain maximum function, the facility can submit an urgent request. TriWest must respond within 24 hours. Your clinician must document why the request qualifies as urgent.
Retrospective authorization: for emergencies
If treatment began in an emergency before authorization could be requested, the facility can submit a retrospective authorization request within 30 days of the start of service. This does not guarantee approval, but emergency admissions are reviewed on their clinical merits.
Source: tricare.mil/GettingCare/Auth. Verify current timeframes directly with TriWest.
What happens if prior authorization is denied
A denial is not final. TRICARE provides a formal appeals process and you have the right to challenge any denial. The most important thing is to act quickly -- most first-level appeals must be filed within 90 days of the denial notice date.
Common reasons TRICARE denies prior authorization include insufficient medical necessity documentation, a requested level of care that does not match clinical criteria, or a facility that is not in the TriWest network.
Full step-by-step appeal guide
The denial and appeal process has specific deadlines and documentation requirements. Our dedicated guide walks through every step, from the initial reconsideration through independent review and formal hearing. Read the TRICARE denial and appeal guide.
Your facility's case manager should be your first call after a denial. Experienced treatment centers navigate TRICARE appeals regularly and can often assist with preparing the reconsideration request. If the denial is for a facility that is out of network, a different in-network facility may be able to obtain authorization more quickly.
Common questions about prior authorization
Answers to what people ask most when navigating TRICARE authorization for addiction treatment.