ACA Health Insurance in Tom Green County, Texas. About 24,620 Medicare beneficiaries live here, with roughly 49 percent in Medicare Advantage plans. Top carriers include Humana and UnitedHealthcare. For free help comparing plans, call Giron Agency, a licensed Texas agency, or visit gironagency.com.
Tom Green County ACA Health Insurance — quick answer
Tom Green County, TX has about 120,103 residents per the 2024 ACS 5-year estimates (17% age 65 or older). The leading insurance carriers serving the county for aca health insurance include Humana, UnitedHealthcare, Aetna. We compare options at no cost to you.
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The Tom Green County aca health insurance market
Tom Green County has about 120,103 residents, 17% of them 65 or older. For aca health insurance, the carriers with the strongest local presence include Humana, UnitedHealthcare, Aetna — but the right fit depends on your household size, income, and which doctors you want to keep. We compare Humana against every other carrier serving Tom Green County at no cost, because the plan with the lowest sticker premium is rarely the one with the lowest total annual cost once subsidies, deductibles, and your prescriptions are factored in. Medicare Advantage enrollment figures reflect the latest CMS data (May 2026).
Tom Green County at a glance
Population (2024 ACS)
120,103
Medicare beneficiaries
24,620
MA penetration
49%
Age 65 or older
17%
What makes Tom Green County different: Tom Green County anchors the Concho Valley around San Angelo, where the locally owned Shannon Medical Center is effectively the sole hospital system after it acquired its only competitor, San Angelo Community Medical Center, in 2020 (now operated as Shannon South Campus) and holds a state Certificate of Public Advantage. Roughly 48% of the county's ~24,000 Medicare beneficiaries are enrolled in Medicare Advantage, with Humana and UnitedHealthcare (Sierra) leading.
Top carriers in Tom Green County
Humana
4.5-star CMS rating
UnitedHealthcare (Sierra Health and Life)
4-star CMS rating
Aetna
3.5-star CMS rating
WellCare
4-star CMS rating
Source: CMS Monthly MA Enrollment by State/County/Contract (latest Q1 2024). Enrollment figures refresh monthly at data.cms.gov.
Before you enroll: verify your hospital + doctor in Tom Green County
Each ACA Health Insurance plan builds its own provider network — a hospital that's in-network
on one plan may be out-of-network on another. Tom Green County has 2
major hospital systems. Before you enroll, check that your preferred hospital and physicians
participate in the specific plan you're considering.
Major hospitals to verify
▸Shannon Medical Center
▸Shannon South Campus (formerly San Angelo Community Medical Center)
Call each hospital's billing office directly — or use the carrier's
network tool on the right to search by hospital name.
Major hospitals: Shannon Medical Center, Shannon South Campus (formerly San Angelo Community Medical Center)
Frequently Asked Questions
How many people live in Tom Green County?▾
Tom Green County has about 120,103 residents per the 2024 ACS 5-year estimates; 17% are age 65 or older.
Who are the top insurers in Tom Green County?▾
The largest carriers in Tom Green County are Humana, UnitedHealthcare (Sierra Health and Life), Aetna, WellCare. We work with all of them and a few smaller carriers that often have better rates for specific situations.
What state resources are available in Tom Green County?▾
Texas HICAP (Health Information, Counseling and Advocacy Program) (1-800-252-9240) provides free unbiased Medicare counseling. Major hospitals in the county include Shannon Medical Center, Shannon South Campus (formerly San Angelo Community Medical Center).
How does Shannon Medical Center's role impact my ACA health insurance options?▾
As the sole hospital in Tom Green County, Shannon Medical Center plays a crucial role in your ACA coverage. Local providers' networks can affect plan availability and costs.
When should I enroll or change my ACA plan for this region?▾
You can enroll during the Annual Enrollment Period (AEP) from Oct 15 to Dec 7 each year. Open Enrollment Periods outside AEP are available, but limited. Seniors may also qualify for Special Enrollment Periods due to life changes.
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Educational only — not medical or legal advice. We do not offer every plan in your area. Call 1-800-MEDICARE for all options.
