Medicare in Marion County
Marion County is home to Indianapolis, which is both the state capital and the county seat. Indianapolis and Marion County operate as a consolidated city-county government. According to the U.S. Census Bureau, 2023 population estimates, about 131,576 people in Marion County are age 65 or older, so Medicare decisions touch a large share of local households.
The Indiana Department of Health hospital directory lists several health systems in Marion County, including Eskenazi Health, Community Hospital East, North and South, Ascension St. Vincent Hospital, Franciscan Health Indianapolis and Indiana University Health. Which of these your plan includes depends on the plan you choose.
Medicare Advantage and Part D plan availability and provider networks are set county by county, so we start with your ZIP code and your doctors and check what you can actually enroll in. We are based in Tysons, Virginia, and help Marion County residents by phone or video call.
The numbers behind Medicare in Marion County
| Marion County | Indiana | |
|---|---|---|
| Residents age 65 and older | 131,576 | 1,179,148 statewide |
| Share of residents age 65+ | 13.6% | 17.2% statewide |
| People with Medicare | 159,914 | 1,432,708 statewide |
| Enrolled in Medicare Advantage | 93,283 | 731,624 statewide |
| Medicare Advantage share | 58.3% | 51.1% statewide |
Sources: Census Bureau 2023 estimates and CMS Medicare Advantage penetration, September 2026.
Among Indiana’s 92 counties, Marion County comes in 1st for residents age 65 and up (131,576). Older adults make up 13.6% of the population here; the state figure is 17.2%. Another 54,053 residents are age 60 to 64 and will reach Medicare eligibility within about five years (see our turning 65 guide). By age, the 65-and-older group splits 63% ages 65 to 74, 28% ages 75 to 84 and 9% age 85 and up (Census 2023). About 58.3% of people with Medicare in Marion County are enrolled in a Medicare Advantage plan. That is higher than the Indiana average of 51.1%. A county average does not tell you which kind of plan fits you. Whether Medicare Advantage or Original Medicare with a Medigap plan is the better fit depends on your doctors, your prescriptions and how you want to handle costs, so we compare both for your ZIP code.
Who has Medicare in Marion County
The U.S. Department of Agriculture classifies Marion County as a metro county (counties in metro areas of 1 million population or more). Counties like this tend to have a wider choice of hospitals and Medicare plans than rural ones, though networks still differ plan by plan.
CMS counts 159,784 Medicare beneficiaries in Marion County (2023). Their average age is 71, about the same as the Indiana average of 72. About 23% are “dual eligible,” meaning they have both Medicare and Medicaid, higher than the state figure of 16%. Where many people have both, special plans for dual-eligible members can matter; see our Medicaid and dual eligible guide, since availability varies by plan and area.
Among people in Original Medicare in Marion County, CMS reported about 660 emergency room visits and 251 inpatient hospital stays per 1,000 beneficiaries in 2023, which is close to the state average for emergency visits (619) and close to it for hospital stays (235). About 7% received home health care. These figures describe how people use care under Original Medicare; they do not show what any plan covers or costs.
Sources: CMS Medicare Geographic Variation, 2023; USDA Rural-Urban Continuum Codes, 2023.
Communities and ZIP codes in Marion County
Census Bureau 2023 estimates put the biggest communities in Marion County at Indianapolis city (balance) (879,293), Lawrence (49,235), Beech Grove (14,422), Speedway (14,157), Cumberland (2,471), Southport (2,068), counting only the part of each community inside the county.
ZIP codes that fall mostly inside Marion County include 46107, 46183, 46201, 46202, 46203, 46204, 46205, 46206, 46208, 46214, 46216, 46217, 46218, 46219 and 22 more. Plan availability can change by ZIP code, so have yours ready when we compare plans.
Questions about Medicare in Marion County?
Reach out to us: fill out our short form or call (571) 354-0146, and a licensed agent will compare the plans available to you, check your doctors and drugs, and stay with you each year at renewal. For general Medicare information, the federal helpline is 1-800-MEDICARE (1-800-633-4227).
Medicare resources from official sources
- Medicare Plan Finder on Medicare.gov, searchable by ZIP code.
- Social Security: Medicare to enroll or check status.
- Medicare.gov: Medigap on how Medicare Supplement works.
- HealthCare.gov if you are not yet on Medicare.
- Indiana Department of Insurance: Indiana’s insurance regulator, including agent license lookup.
Coverage we offer Marion County residents
Here is what we can help Marion County residents with, drawing on plans from many insurers: final expense insurance, annuities, Medicare Advantage, Medicare Supplement (Medigap), Part D drug plans, ACA health insurance, ICHRA, group health insurance and life insurance.
Let’s check your Marion County options together
We’ll confirm your doctors and prescriptions before you enroll. Our help is free to you.
Get my plan comparisonPlain-English Medicare answers
- Medicare Advantage vs. Medigap: how to choose
- Medicare Parts A, B, C and D explained
- What Medicare Part D actually costs
- Can I change my Medicare plan after December 7?
Marion County compared with similar Indiana counties
| County | Residents 65+ | Medicare Advantage share | Dual eligible share | Area type |
|---|---|---|---|---|
| Lake County | 91,656 | 46.4% | 17% | Metro |
| Allen County | 63,254 | 64.5% | 21% | Metro |
| Hamilton County | 53,693 | 42.7% | 8% | Metro |
| St. Joseph County | 47,027 | 55.5% | 15% | Metro |
| Vanderburgh County | 33,660 | 47.7% | 15% | Metro |
| Porter County | 33,101 | 39.9% | 12% | Metro |
See every Indiana county in our Indiana directory or go to our Indiana Medicare hub.