• Medicare cost plans are sold by private companies and work with your original Medicare coverage to offer additional benefits.
  • While they’re similar to Medicare Advantage plans, Medicare cost plans allow more flexibility in choosing a Part D plan and using out-of-network healthcare providers.
  • Medicare cost plans are only available in specific areas of the country.
  • To enroll in a Medicare cost plan, you must have Part B and have a cost plan available in your area that’s accepting new members.

You may know that Medicare is made up of several different parts. Some of these parts, such as Medicare Advantage and Part D plans, are available through private insurance companies. Another type is a Medicare cost plan.

A Medicare cost plan blends parts of both original Medicare and Medicare Advantage. These plans work together with your original Medicare coverage while providing additional benefits and flexibility.

Medicare cost plans are very similar to Medicare Advantage plans. However, there are some key differences between the two.

Share on Pinterest
Thomas Barwick/Getty Images

Medicare cost plans are offered through private insurance companies that are approved by Medicare. These plans work along with original Medicare (parts A and B) but also include some additional benefits.

Medicare cost plans appeal to many people because they provide a blend of benefits from both original Medicare and Medicare Advantage (Part C).

Medicare cost plans are only available in certain areas of the country. Additionally, changes in federal laws have led to the discontinuation of Medicare cost plans in many areas.

When you enroll in a Medicare cost plan, you gain access to the plan’s network of healthcare providers. You can either choose a provider within this network or an out-of-network provider. When you go out of network, it’s covered by original Medicare.

Additionally, some Medicare cost plans come bundled with Part D prescription drug coverage. If your plan doesn’t include Part D, you can enroll in a separate Part D plan that best suits your needs.

There’s also additional flexibility in switching plans. If you’re not happy with your Medicare cost plan, you can switch back to original Medicare at any time without waiting for the open enrollment period.

Medicare Advantage plans are offered by private companies and include at least the same level of coverage as original Medicare. Medicare Advantage plans effectively replace original Medicare, while providing additional benefits like dental, vision, and hearing care.

Like Medicare Advantage plans, Medicare cost plans are offered by private companies and may also include extra coverage. However, unlike Medicare Advantage plans, a Medicare cost plan doesn’t replace your original Medicare coverage. Instead, it offers other benefits in addition to those of original Medicare.

Medicare cost plans also give increased flexibility to use out-of-network healthcare professionals. Many Medicare Advantage plans require you to see in-network doctors or allow the use of out-of-network doctors at a higher cost.

The table below summarizes the differences between the two types of plans:

Medicare AdvantageMedicare cost plan
How it worksused instead of original Medicare works together with original Medicare
Monthly premiumsometimes, although more than half of MA plans have no monthly premium yes, although it’s often low
Out-of-network providers alloweddepends on the plan type, but usually comes at a higher costyes, covered under original Medicare if you have Medicare Part A and Part B

To enroll in a Medicare cost plan, you must meet the following eligibility requirements:

  • be enrolled in Medicare Part B
  • live in an area where Medicare cost plans are offered
  • find a Medicare cost plan that’s accepting new members
  • complete an application during the plan’s enrollment period
  • agree to all cost plan rules that are disclosed during the enrollment process

It’s possible that you could be denied enrollment in a Medicare cost plan. This can happen if:

  • you don’t meet the requirements listed above
  • the Centers for Medicare & Medicaid Services (CMS) has issued a waiver or limitation for a plan’s open enrollment period, restricting who can enroll

Below, we’ll break down the steps to enroll in a Medicare cost plan.

Medicare Part B eligibility and enrollment

To enroll in a Medicare cost plan, you must first be enrolled in Medicare Part B. To be eligible for Part B, you must meet one of the following criteria:

People who receive retirement or disability benefits from the Social Security Administration (SSA) or the Railroad Retirement Board are automatically enrolled in original Medicare when they’re first eligible. Others will have to apply through the SSA.

Medicare cost plan enrollment

Once you’re enrolled in Part B, you can enroll in a Medicare cost plan. Remember that you can only enroll in a Medicare cost plan in your area that’s accepting new members.

To find a Medicare cost plan near you, use Medicare’s plan comparison tool. You can also contact your local State Health Insurance Assistance Program (SHIP) for help.

Companies that offer Medicare cost plans must provide Medicare beneficiaries with an open enrollment period of at least 30 days. During this time, you’ll submit an application to the plan’s provider to enroll.

Enrollment details may be different depending on the company that’s offering the cost plan. Be sure to check with the plan’s provider for specific details on enrollment periods and application materials.

Medicare Part D enrollment

Some Medicare cost plans include prescription drug coverage under Medicare Part D. However, others offer medical benefits only.

If your plan doesn’t include prescription drug coverage, you can enroll in a Part D plan separately. You can enroll in a separate Part D plan during specific periods.

Medicare cost plans work alongside your original Medicare coverage to provide further benefits and flexibility. They can be purchased through private insurance companies.

These plans offer many of the extra benefits that come with Medicare Advantage plans, such as dental, vision, and hearing care. However, unlike Medicare Advantage plans, people with Medicare cost plans have more flexibility to use out-of-network doctors and to choose a separate Part D plan.

To enroll in a Medicare cost plan, you need to be enrolled in Part B and have a plan in your area that’s accepting new members.