Medigap Plan K Supplement Insurance

Medigap Plan K is a Medicare Supplement plan that pays half of many Original Medicare out-of-pocket expenses until you hit your plan’s maximum out-of-pocket limit for the year. After reaching that limit, Medigap Plan K pays 100% of the Medicare-covered costs that Plan K covers.

Terry Turner, writer and researcher for RetireGuide
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    Terry Turner

    Senior Financial Writer and Financial Wellness Facilitator

    Terry Turner has more than 35 years of journalism experience, including covering benefits, spending and congressional action on federal programs such as Social Security and Medicare. He is a Certified Financial Wellness Facilitator through the National Wellness Institute and the Foundation for Financial Wellness and a member of the Association for Financial Counseling & Planning Education (AFCPE®).

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  • Published: July 2, 2021
  • Updated: May 23, 2023
  • 3 min read time
  • This page features 9 Cited Research Articles
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A licensed insurance professional reviewed this page for accuracy and compliance with the CMS Medicare Communications and Marketing Guidelines (MCMGs) and Medicare Advantage (MA/MAPD) and/or Medicare Prescription Drug Plans (PDP) carriers’ guidelines.

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APA Turner, T. (2023, May 23). Medigap Plan K Supplement Insurance. Retrieved June 8, 2023, from

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Chicago Turner, Terry. "Medigap Plan K Supplement Insurance." Last modified May 23, 2023.

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What Does Medigap Plan K Cover?

Medigap Plan K is a Medicare Supplement insurance plan that helps you pay for out-of-pocket costs associated with Original Medicare — Medicare Part A and Part B.

While most Medigap plans cover 100% of most costs, you will still have to pay some out-of-pocket costs under Plan K until you meet your Part B deductible and your plan’s maximum out-of-pocket (MOOP) limit for the year – $6,940 in 2023.

Medigap Plan K Coverage
  • 100% of Medicare Part A coinsurance and hospital costs for an extra 365 days after your Original Medicare benefits are used up
  • 50% of the following Medicare costs until you reach your MOOP each year:
    • Medicare Part A deductible
    • Medicare Part A hospice care coinsurance or copayment
    • Medicare Part B coinsurance or copayment
    • First three pints of blood for medical procedures each year
    • Skilled nursing facility care
  • 100% of the above listed out-of-pocket costs for the remainder of the calendar year after you reach your MOOP
Source: U.S. Centers for Medicare & Medicaid Services

As an example of how Plan K would work, here’s how it would cover your Medicare Part B medical insurance coinsurance payment. If you had a $100 medical bill from an office visit with your doctor, Part B would pay $80. You would have to pay the remaining $20.

With Medigap Plan K, the plan would pay $10 and you would pay the other $10.

There are some out-of-pocket costs that Medigap Plan K does not cover.

Out-of-Pocket Costs Not Covered by Medigap Plan K
  • Medicare Part B deductible – $226 in 2023
  • Medicare Part B excess charges – charges over and above the Medicare-approved amount that your doctor is legally allowed to bill you for medical services
  • Emergency medical care while traveling in a foreign country
Source: U.S. Centers for Medicare & Medicaid Services

Medigap Plan K does not cover prescription drugs or dental, vision and hearing care. No Medigap plans cover these costs.

If you want help paying for prescriptions, you can purchase a Medicare Part D prescription drug plan from a private insurer. You can also purchase a Medicare Advantage plan — most contain Medicare Part D benefits. Medicare Advantage plans may also cover dental, vision and hearing care.

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How Much Does Medigap Plan K Cost?

Medicare Plan K policies are sold by private insurers. Monthly premium costs vary from company to company and depending on where you live. Plan K premiums are in addition to monthly premiums you have to pay for Original Medicare and optional Medicare Plan D prescription drug coverage.

Medigap Plan K Costs to Consider
  • Monthly premiums – amount varies depending on location and plan administrator
  • Medicare Part B hospital insurance deductible – up to $226 in 2023
  • Medigap Part B excess charges – if you have any
  • 100% of any medical care while traveling outside the United States
  • Maximum out-of-pocket costs before Plan K provides full coverage – up to $6,940 in 2023
Source: U.S. Centers for Medicare & Medicaid Services

Your monthly premiums for Medigap Plan K and other Medicare coverage — Medicare Part A, Part B and Part D — do not apply to your maximum out-of-pocket limit.

What Is the Difference Between Medigap Plan K and Plan L?

Medigap Plan K is similar to Plan L. When comparing Medigap plans, note that the key difference is that Plan L provides more benefits and a lower maximum out-of-pocket limit. Where Plan K covers 50% of some out-of-pocket costs, Medigap Plan L covers 75% until you meet the Plan L MOOP – $3,470 in 2023.

Either Medigap Plan K or Plan L may be a good fit if you prefer coverage similar to an employer health insurance plan and are not bothered by out-of-pocket costs.

They may also be right for you if you live in a state that doesn’t allow Medicare Part B excess charges, are in relatively good health, don’t have serious health problems and seldom have to visit a doctor.

Last Modified: May 23, 2023

9 Cited Research Articles

  1. U.S. Centers for Medicare & Medicaid Services. (2022, October). K & L Out-of-Pocket Limits Announcements. Retrieved from
  2. U.S. Centers for Medicare & Medicaid Services. (2022, September 27). 2023 Medicare Parts A & B Premiums and Deductibles 2023 Medicare Part D Income-Related Monthly Adjustment Amounts. Retrieved from
  3. U.S. Centers for Medicare & Medicare Services. (2022, September). Welcome to Medicare. Download. Retrieved from
  4. Bunis, D. (2022, May 11). Medigap Plans Help Bridge Gap of Original Medicare Costs. Retrieved from
  5. U.S. Centers for Medicare & Medicare Services. (2022, March). Choosing a Medigap Policy: A Guide to Health Insurance for People With Medicare. Retrieved from
  6. U.S. Centers for Medicare & Medicare Services. (2021, December 1). K & L Out-of-Pocket Limits Announcements. Retrieved from
  7. U.S. Centers for Medicare & Medicare Services. (n.d.). How to Compare Medigap Policies. Retrieved from
  8. U.S. Centers for Medicare & Medicare Services. (n.d.). What’s Medicare Supplement Insurance (Medigap)? Retrieved from
  9. U.S. Centers for Medicare & Medicare Services. (n.d.). Medicare Costs at a Glance. Retrieved from