TRICARE Illinois: Rock Island Arsenal & Regional Guide | TRICARE.com

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## TRICARE in Illinois Illinois is located within the **TRICARE East Region**. Comprehensive health care coverage for beneficiaries in Illinois is managed by the regional contractor, **Humana Military**. While the state borders the West Region, all residents—including those stationed at major hubs like Rock Island Arsenal—utilize the Humana Military provider network and administrative services.

## Major military installations Illinois is home to several critical military installations, most notably a major joint-service hub in the Quad Cities area.

* **Rock Island Arsenal (Army):** Located in Rock Island, this is the largest government-owned weapons manufacturing arsenal in the U.S. and a major employer for TRICARE beneficiaries in the region. * **Naval Station Great Lakes (Navy):** Located in North Chicago, this is the home of the Navy's only Recruit Training Command (Boot Camp). * **Scott Air Force Base (Air Force):** Located in St. Clair County near Belleville, it serves as the headquarters for U.S. Transportation Command.

## Plans available in Illinois Military families in Illinois have access to the full suite of TRICARE programs. Availability often depends on your distance from a military hospital or clinic (Military Treatment Facility).

| Plan | Best For | | :--- | :--- | | **TRICARE Prime** | Active duty members and families near bases like Great Lakes or Scott AFB. Managed care with a Primary Care Manager (PCM). | | **TRICARE Select** | PPO-style plan with the most flexibility to see any network provider without a referral. | | **TRICARE Reserve Select (TRS)** | Qualified National Guard and Reserve members (2026 rates apply). | | **TRICARE Retired Reserve (TRR)** | Retired Reserve members under age 60 and their families. | | **TRICARE For Life (TFL)** | Wrap-around coverage for those with Medicare Part A and B. | | **TRICARE Young Adult** | Unmarried adult children (ages 21–25) who have aged out of regular TRICARE coverage. |

*Note: The US Family Health Plan (USFHP) is generally not available in Illinois as there are no designated USFHP provider sites in the state.*

## Finding care in Illinois Because Illinois is in the East Region, beneficiaries should use the **Humana Military Provider Directory** to find doctors, specialists, and urgent care centers.

* **Rock Island Arsenal Beneficiaries:** While the Arsenal has an Army Health Clinic on-site for active duty and some family members, many residents in the Quad Cities area (Moline, Rock Island) may be referred to network civilian providers in the surrounding community for specialty care. * **Network vs. Non-Network:** To keep out-of-pocket costs low, always verify that a provider is "In-Network" with Humana Military. Non-network providers will result in higher cost-shares (2026 rates vary by plan). * **Telehealth:** Illinois residents have access to Doctor On Demand and other tele-behavioral health services through Humana Military's partnership with specialized telehealth vendors. No referral is needed for most specialized mental health telehealth visits for active duty family members.

Common questions for Illinois beneficiaries

**If I live in the Illinois Quad Cities but my doctor is in Iowa, am I still covered?** Yes. Because the Rock Island Arsenal area spans the Illinois-Iowa border, TRICARE East coverage remains seamless. However, ensure your provider is part of the Humana Military network, regardless of which side of the Mississippi River their office is located.

**How does TRICARE work with Illinois Medicaid?** TRICARE is always the primary payer to Medicaid. If you are a low-income veteran or family member qualifying for Illinois Medicaid (All Kids or AABD), TRICARE pays first, and Medicaid acts as the payer of last resort.

**I am PCSing to Rock Island Arsenal; when should I switch my enrollment?** You should contact Humana Military to update your address and enrollment as soon as you arrive in Illinois. Because Illinois is in the East Region, if you are coming from a West Region state (like Iowa or Missouri), you will be transitioning your record from TriWest Healthcare Alliance to Humana Military.

## Sources * TRICARE East Region - Humana Military: [https://www.humanamilitary.com/](https://www.humanamilitary.com/) * TRICARE Plans and Eligibility: [https://www.tricare.mil/Plans/Eligibility](https://www.tricare.mil/Plans/Eligibility) * Rock Island Arsenal Health Clinic: [https://rockisland.tricare.mil/](https://rockisland.tricare.mil/) * TRICARE Provider Search: [https://www.tricare.mil/FindDoctor](https://www.tricare.mil/FindDoctor)