TRICARE Supplemental Insurance: Costs & Coverage Guide
**Note:** *TRICARE.com is an independent reference site and is not affiliated with the official TRICARE program or the Department of Defense. For official policy and enrollment, visit TRICARE.mil.*
## Quick answer TRICARE Supplemental Insurance is a private insurance policy you buy to help pay for the "leftover" costs that TRICARE doesn't cover, such as copayments, cost-shares, and deductibles. It is primarily designed for TRICARE Select and TRICARE For Life users who want to eliminate out-of-pocket expenses and minimize financial unpredictability.
## Details TRICARE is high-quality coverage, but it is not "free" for everyone. Depending on your status and plan, you may face annual deductibles and cost-shares (the percentage of the bill you pay). A supplemental plan acts as a secondary payer; it wraps around your TRICARE coverage to pay the portion of the bill assigned to the patient.
### How it Works 1. **Provider Bills TRICARE:** Your doctor sends the claim to TRICARE (Humana Military in the East or TriWest in the West). 2. **TRICARE Pays:** The regional contractor pays their portion of the "allowable charge." 3. **Supplemental Pays:** The remaining balance (your copay or cost-share) is sent to the supplemental insurer, which then pays the remainder.
### Common Costs and Coverage (2026 Rates) While TRICARE Select Group A retirees might face a $3,000 to $4,000 catastrophic cap (the maximum out-of-pocket per year), a supplemental plan ensures you don't have to reach that cap to get relief. * **Premiums:** You pay a monthly premium to a private company (like AFBA, MOAA, or USAA) for the supplement. * **Deductibles:** Most supplemental plans have their own small annual deductible (often $250 for individuals) before they start paying your TRICARE cost-shares. * **Eligibility:** You generally cannot use a supplement if you are on TRICARE Prime, as Prime has very low out-of-pocket costs that make a supplement's premium cost-prohibitive.
### Why get it? * **Peace of Mind:** You trade a predictable monthly premium for the risk of a large, unexpected hospital bill. * **TRICARE For Life (TFL) Users:** While TFL usually leaves $0 in out-of-pocket costs for Medicare-covered services, a supplement can help with services covered by TRICARE but not Medicare (or vice versa), though this is a niche use case. * **Excess Charges:** Some supplements cover "excess charges" if you see a non-participating provider who charges up to 15% above the TRICARE allowable rate.
## Who this affects * **Retirees and their families:** The primary users of supplements, especially those using TRICARE Select. * **TRICARE Reserve Select (TRS) members:** Reservists who want to eliminate the 20% cost-share for outpatient visits. * **TRICARE Retired Reserve (TRR) members:** High-cost plans that benefit from secondary coverage. * **Survivors:** Spouses and children of deceased service members. * *Note: Active Duty Service Members (ADSMs) cannot use supplemental insurance because they have no out-of-pocket costs.*
## Sources * **TRICARE.mil:** [Using Other Health Insurance](https://tricare.mil/Plans/OHI) * **Defense Health Agency (DHA):** [TRICARE Cost Terms](https://tricare.mil/Costs/CostTerms) * **TriWest Healthcare Alliance:** [West Region Claims and Secondary Payers](https://www.triwest.com) * **Humana Military:** [East Region Beneficiary Financial Responsibilities](https://www.humanamilitary.com)