Provider profile

Elizabeth GrethenMD

Internal Medicine, Endocrinology, Diabetes & Metabolism

CMS lists a Medicare opt-outNPI 1962660522
188 W Carmel Dr, Carmel, IN 46032317-660-1322

Check your plan

Medicare Advantage plans for Hamilton County, IN.

Checked Oct 14, 2026

Use the name or plan ID on your member card, or choose your insurance company.

Directory results See what each insurance company reports

The 66 Medicare Advantage plans we show for Hamilton County, IN in 2027

  • 11 list Elizabeth
  • 55 not listed

Devoted

6 plans list Elizabeth.

6plans
  • DEVOTED CHOICE 011 IN (PPO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPODrug coverageH7471-011-000Medicare.gov
    $0a month
  • DEVOTED CHOICE GIVEBACK 012 IN (PPO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPODrug coverageH7471-012-000Medicare.gov
    $0a month
  • DEVOTED CHOICE GIVEBACK EXTRAS 023 IN (PPO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPODrug coverageH7471-023-000Medicare.gov
    $0a month
  • DEVOTED C-SNP CHOICE ENHANCED 014 IN (PPO C-SNP)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPOFor people with certain chronic conditionsDrug coverageH7471-014-000Medicare.gov
    $0a month

Zing Health

5 plans list Elizabeth.

5plans
  • Zing Open Choice IN (PPO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPODrug coverage3.5 starsH6876-004-000Medicare.gov
    $0a month
  • Zing Select Care IN (HMO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    HMODrug coverage3.5 starsH4624-003-000Medicare.gov
    $0a month
  • Zing Open Choice Diabetes & Heart IN (PPO C-SNP)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    PPOFor people with certain chronic conditionsDrug coverage3.5 starsH6876-005-000Medicare.gov
    $0a month
  • Zing Select Diabetes & Heart IN (HMO C-SNP)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 10801 N Michigan Rd, Zionsville, IN, 46077

    This result applies to these offices. Other locations are not confirmed.

    HMOFor people with certain chronic conditionsDrug coverage3.5 starsH4624-011-000Medicare.gov
    $0a month

Aetna Medicare

Not listed on its 5 plans here. That isn't proof they're out of network.

Anthem Blue Cross and Blue Shield · Anthem HealthKeepers

Not listed on its 16 plans here. That isn't proof they're out of network.

Humana

Not listed on its 17 plans here. That isn't proof they're out of network.

MyTruAdvantage

Not listed on its 4 plans here. That isn't proof they're out of network.

UnitedHealthcare

Not listed on its 10 plans here. That isn't proof they're out of network.

Wellcare

Not listed on its 3 plans here. That isn't proof they're out of network.

Premiums are each plan's own monthly premium, as filed with Medicare. You keep paying your Medicare Part B premium.

Can't find your plan?Tell us the plan you have, and a licensed Silverpath advisor will check whether Elizabeth takes it. Free.

CMS lists a Medicare opt-out period

CMS's opt-out file, covering data through 2026-08-31, lists a period from 2024-07-11 until 2028-07-11. Medicare generally won't pay for services from an opted-out provider, except in emergencies. Confirm current status with the office. This is separate from Advantage plan network and office matches.

CMS opt-out source · Data through 2026-08-31 · Reviewed Oct 25, 2026

Practice location

188 W Carmel Dr
Carmel, IN 46032

NPI Registry
NPI issued
2008
Registry record updated
Jan 16, 2025

Medicare's clinician details aren't available on this page yet.

Common questions

Does Elizabeth Grethen accept Medicare?

CMS lists a Medicare opt-out. CMS's opt-out file, covering data through 2026-08-31, lists a period from 2024-07-11 until 2028-07-11. Medicare generally won't pay for services from an opted-out provider, except in emergencies. Confirm current status with the office. This is separate from Advantage plan network and office matches.

Which 2027 Medicare Advantage plans list Elizabeth Grethen?

In Hamilton County, IN, 11 Medicare Advantage plans for 2027 list Elizabeth in provider data from Medicare.gov or the carrier, including DEVOTED CHOICE 011 IN (PPO), DEVOTED CHOICE GIVEBACK 012 IN (PPO) and DEVOTED CHOICE GIVEBACK EXTRAS 023 IN (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Networks can change during the year, so confirm with the office or the plan before you enroll.

Does Elizabeth Grethen take Devoted Medicare Advantage plans?

Medicare.gov provider data lists Elizabeth on 6 Medicare Advantage plans for 2027 in Hamilton County, IN, including DEVOTED CHOICE 011 IN (PPO) and DEVOTED CHOICE GIVEBACK 012 IN (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Devoted before you enroll.

Does Elizabeth Grethen take Zing Health Medicare Advantage plans?

Medicare.gov provider data lists Elizabeth on 5 Medicare Advantage plans for 2027 in Hamilton County, IN, including Zing Open Choice IN (PPO) and Zing Select Care IN (HMO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Zing Health before you enroll.

Does Elizabeth Grethen take Aetna Medicare Medicare Advantage plans?

The provider searches didn't return a listing for Elizabeth on these 5 plans for 2027 in Hamilton County, IN. Directories can lag, and a clinician can be in network at another office, so that isn't proof Elizabeth is out of network. Ask the office or a Silverpath advisor to confirm.

Where does Elizabeth Grethen practice?

188 W Carmel Dr, Carmel, IN 46032.

How do I confirm Elizabeth is in my plan's network?

Call the member services number on your plan card and give them the NPI 1962660522, or ask a Silverpath advisor to check for you. It's free.

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A Silverpath advisor can confirm Elizabeth's networks with the carrier and help you compare plans that include them.

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For providers

Is this your practice?

What patients see here today:

  • Provider searches did not return a listing for Elizabeth Grethen on 55 plans from Aetna Medicare, Anthem Blue Cross and Blue Shield, Humana, MyTruAdvantage, UnitedHealthcare and Wellcare in Hamilton County, IN. Other offices are not confirmed; this isn't proof the practice is out of network.

Tell us which plans you take, or want to take, and we'll keep this page accurate and talk with you about reaching more Medicare patients and carriers.

Sources. Name, specialty and locations: the CMS NPI Registry (record updated 2025-01-16). Plan networks: carrier provider directories and Medicare.gov provider data, checked Oct 14, 2026. CMS matches apply to the covered offices shown with each plan. Plans: CMS 2027 Medicare Advantage landscape.

Networks change during the year, and a directory can be out of date. Confirm with the provider's office and the plan before you enroll or schedule care.

Silverpath is a licensed insurance agency. This page isn't affiliated with or endorsed by Elizabeth Grethen or their practice. Not connected with or endorsed by the U.S. government or the federal Medicare program.

We do not offer every plan available in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.

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