Idaho residents can choose from Original Medicare (parts A and B) and Medicare Advantage (Part C) plans. Medicare supplement plans may provide additional coverage for Original Medicare enrollees.

Medicare plans in Idaho provide health insurance for people 65 and older and some people under 65 who meet certain medical qualifications.

Original Medicare is provided through the federal government. Medicare Advantage, prescription drug plans, and Medigap insurance are all offered through private insurance carriers.

Read on to learn more about your Medicare options in Idaho and when to enroll.

The Centers for Medicare & Medicaid Services (CMS) reported the following information on Medicare trends in Idaho for the 2025 plan year:

  • A total of 390,132 residents of Idaho are enrolled in Medicare.
  • The average Medicare Advantage monthly premium increased in Idaho from $16.94 in 2024 to $22.29 in 2025.
  • There are 83 Medicare Advantage plans available in Idaho for 2025, compared to 66 plans in 2024.
  • About 99% of Idaho residents with Medicare have access to buy a Medicare Advantage plan, including plans with $0 premiums.
  • There are 12 different Medigap plans offered in Idaho for 2025.

Everyone who enrolls in Medicare, including Medicare Advantage plans, must first sign up for Part A and Part B coverage, also known as original Medicare.

Original Medicare

Original Medicare, also called traditional Medicare, is offered through the federal government and funded through payroll taxes and taxes on Social Security income. It consists of two parts: Part A and Part B.

Part A covers:

Part B covers:

Medicare Advantage in Idaho

Medicare Advantage (Part C) plans are available through private insurance carriers who bundle parts A and B, and often prescription drug benefits and additional types of coverage, such as:

Private insurers that offer Medicare Advantage plans in Idaho for 2025 may include:

Available plans will vary depending on your county of residence.

Medicare supplement plans in Idaho

Medigap plans are available through private insurance carriers to help cover some of your care costs since Original Medicare does not have an out-of-pocket limit. These plans are only available with Original Medicare.

Many companies offer Medigap plans in Idaho. For 2025, some of the companies offering Medigap plans throughout the state include:

Medicare in Idaho is available to U.S. citizens (or legal residents for 5 or more years) who are 65 years old and over. If you are under 65 years old, you may still be able to get Medicare if you:

When can I enroll in Medicare Idaho plans?

You can enroll in or change Medicare and Medicare Advantage plans at certain times of the year:

  • Initial enrollment period (IEP): Three months before you turn 65, you can enroll in Medicare for coverage that begins during your birthday month. If you miss that window, you can still enroll during your birthday month or 3 months after, but there is a delay before coverage starts.
  • General enrollment (January 1–March 31): You can sign up for parts A, B, or D during general enrollment if you missed IEP and don’t qualify for a special enrollment period. If you don’t have other coverage and didn’t sign up during your IEP, you may pay a late sign-up penalty for Part B and Part D.
  • Open enrollment (October 15–December 7): If you’re already signed up for Medicare, you can change plan options during the annual open enrollment period.
  • Medicare Advantage open enrollment (January 1–March 31): During open enrollment, you can change Medicare Advantage plans or switch to Original Medicare.
  • Special enrollment period (SEP): You can sign up for Medicare during a SEP if you’ve lost coverage for a qualifying reason, such as moving out of your plan’s network area or losing an employer-sponsored plan after retirement. You don’t have to wait for annual enrollment.

Tips for enrolling in Medicare in Idaho

With so many options available, it’s important to carefully consider your healthcare needs to determine whether Original Medicare or Medicare Advantage is the best choice and whether you might need supplemental coverage.

Choose a plan that:

  • has doctors you like and facilities convenient to your location
  • covers the services you need
  • provides affordable coverage
  • has a high star rating for quality and patient satisfaction from CMS

Find answers to questions and get help with Medicare Idaho plans from the following resources:

  • Senior Health Insurance Benefits Advisors (SHIBA) (800-247-4422): SHIBA provides free help for Idaho seniors with questions about Medicare.
  • Idaho Department of Insurance (800-247-4422): This resource offers information on Extra Help and Medicare Savings Programs, which can help you pay for Medicare if you cannot afford it.
  • Idaho AIDS Drug Assistance Program (ADAP) (800-926-2588): ADAP offers financial assistance for Medicare Part D coverage if you are HIV-positive.
  • Medicare (800-633-4227): You can also contact Medicare if you have additional questions.

Over 390,000 Idaho residents are enrolled in Medicare.

Several private insurance companies offer various types of Medicare Advantage and Medigap plans throughout the state.

Overall, monthly premium costs have increased for 2025 Medicare Advantage plans in Idaho.

There are also several Medigap plan options if you live in Idaho and are looking for additional coverage.