Medicare Supplement in Grimes County, Texas. About 7,483 Medicare beneficiaries live here, with roughly 51 percent in Medicare Advantage plans. Top carriers include UnitedHealthcare and Humana. For free help comparing plans, call Giron Agency, a licensed Texas agency, or visit gironagency.com.
Grimes County Medicare Supplement — quick answer
Grimes County, TX has 7,483 Medicare beneficiaries per CMS Q1 2024 data, with about 51% enrolled in Medicare Advantage. The top medicare supplement carriers are UnitedHealthcare, Humana, WellCare. We compare these plans for free and never charge a fee.
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The Grimes County medicare supplement market
About 51% of Grimes County's 7,483 Medicare beneficiaries are in Medicare Advantage — right around the national norm — so you'll find a genuine mix of competitive MA plans and Medigap options here rather than a one-sided market. UnitedHealthcare currently leads the county by enrollment, but the lowest total-cost plan for your specific drugs and doctors is often a smaller carrier — which is why we run all of them side by side instead of pushing the biggest name. Right now roughly 24 Medicare Advantage plans are available in Grimes County, so a side-by-side comparison genuinely matters. Medicare Advantage enrollment figures reflect the latest CMS data (May 2026).
Grimes County at a glance
Population (2024 ACS)
35,161
Medicare beneficiaries
7,483
MA penetration
51%
Age 65 or older
19%
What makes Grimes County different: Grimes County straddles the rural corridor between Bryan/College Station and Houston, with Navasota (the self-styled 'Blues Capital of Texas' and largest city) the commercial center while Anderson remains the historic county seat. The county's only hospital is the 25-bed CHI St. Joseph Health Grimes Hospital in Navasota, a critical access facility with a Level IV trauma designation.
Top Medicare Advantage plans in Grimes County
UnitedHealthcare
4-star CMS rating
Humana
4-star CMS rating
WellCare (Centene)
3.5-star CMS rating
Devoted Health
4.5-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 Grimes County
Each Medicare Supplement plan builds its own provider network — a hospital that's in-network
on one plan may be out-of-network on another. Grimes County has 1
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
â–¸CHI St. Joseph Health Grimes Hospital (Navasota)
Call each hospital's billing office directly — or use the carrier's
network tool on the right to search by hospital name.
Free help in Grimes County: Texas HICAP — call 1-800-252-9240.
SHIP counselors offer free unbiased Medicare guidance and can run network checks at no cost.
Or skip the cross-checking — we run network checks against your prescriptions and doctors
at no cost during any consult.
Medicare AEP opens in 131 days
131 daysuntil open
Outside the windows, Special Enrollment Periods (SEP) still let you change plans if you moved, lost coverage, qualify for Extra Help / dual eligible, or had a plan terminated. Call to see if you qualify.
Major hospitals: CHI St. Joseph Health Grimes Hospital (Navasota)
Frequently Asked Questions
How many Medicare beneficiaries live in Grimes County?â–¾
About 7,483 Texans in Grimes County are enrolled in Medicare as of May 2026 CMS data. About 51% are in Medicare Advantage plans; the rest are in Original Medicare (with or without Medigap).
Who are the top Medicare carriers in Grimes County?â–¾
The largest carriers in Grimes County are UnitedHealthcare, Humana, WellCare (Centene), Devoted Health. We work with all of them and a few smaller carriers that often have better rates for specific situations.
What SHIP resources are available in Grimes County?â–¾
Texas HICAP (1-800-252-9240) provides free unbiased Medicare counseling. Major hospitals in the county include CHI St. Joseph Health Grimes Hospital (Navasota).
How many Medicare Advantage plans are available in Grimes County?â–¾
As of May 2026, about 24 Medicare Advantage plans are available to Grimes County residents, led by UnitedHealth Group, Inc., CVS Health Corporation, Baylor Scott & White Health, Health Care Service Corporation. We compare all of them side by side at no cost.
How does the local hospital affect Medicare Supplement plans in Grimes County?â–¾
The county's only critical access facility, CHI St. Joseph Health Grimes Hospital in Navasota, offers a Level IV trauma designation, making it essential for residents' healthcare needs. Matt can help you find a plan that covers your specific medical requirements.
What are the enrollment periods and who qualifies for Medicare Supplement plans?â–¾
You can enroll in Medicare Supplement plans during Annual Enrollment Period (AEP) from October 15 to December 7, or through Special Enrollment Periods if you have a life-changing event. These plans are designed to help those with Original Medicare by covering out-of-pocket costs.
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