Home › Knowledge › Medicare Supplement (Medigap)
Vedanth Bhartee
Writer · Reviewed by Richard ChanUpdated Jun 12, 2026
7 min read
Medigap Plan K covers 50% of the cost for most Medicare-approved Part B coinsurance and copayments.
This plan includes a yearly out-of-pocket limit, meaning once the cap and Part B deductible are met, the plan pays 100% of covered services.
Plan K pays 50% of the Part A deductible but offers no coverage for the Part B deductible or foreign travel emergencies.
Medicare is a federal health insurance program that covers millions of Americans aged 65 years and above, besides those with certain disabilities and diseases. While Original Medicare (Part A and Part B) covers a wide range of hospital and health insurance scenarios, it doesn’t address everything. This means there are gaps in Original Medicare, which are filled by Medicare Supplement or Medigap plans.?
Among the several choices of Medigap plans, Plan K is a cost-effective option designed to make up for the limitations of Original Medicare.?
Given that everyone has different healthcare needs and financial circumstances, could Medicare Plan K be the right fit for you? This article breaks down the various aspects of Medicare Plan K to equip you with valuable information about its features, benefits, limitations, and enrollment process.
Medicare Plan K is a budget-friendly supplement to Original Medicare that targets specific gaps left by Part A and Part B. With an average monthly premium of $77, Plan K has become a popular choice for those conscious of healthcare costs. One of the unique aspects of this plan is its cost-sharing approach. Unlike other Medigap plans that may cover 100% of certain costs, Plan K generally covers 50% of the costs for many healthcare services until you reach an annual out-of-pocket limit.
This structure particularly benefits individuals who anticipate moderate medical expenses and are comfortable sharing some costs upfront. For example, Medicare Part B would normally cover $8,000 of a $10,000 medical bill. With Plan K’s 50% coinsurance for Part B, your out-of-pocket expense would be just $1,000, with Plan K covering the remaining $1,000. Once you hit your yearly out-of-pocket limit, the plan covers 100% of your medical costs for the remainder of the year.
Plan K is most similar to Medigap Plan L. Both plans offer cost-sharing features, but Plan L covers 75% of certain healthcare costs, compared to Plan K’s 50%. Neither plan covers the Medicare Part B deductible or excess charges, which are amounts that healthcare providers may charge beyond what Medicare will reimburse.
Eligibility for Medicare Plan K is quite straightforward. You are eligible for this plan if you are 65 years or older or qualify because of a disability or end-stage renal disease, and you are already enrolled in Original Medicare. While you can enroll in Plan K at any time, it?s most advantageous to do so during your Medigap Open Enrollment Period, which begins the month you turn 65 and lasts for six months. During this time, you have guaranteed access to the best rates, and insurance companies cannot deny you coverage because of pre-existing conditions.
Medicare Plan K offers a suite of benefits designed to enhance your Original Medicare coverage. One of its significant advantages is extended hospital stay coverage. Plan K provides Part A coinsurance and extends your hospital coverage for an additional 365 days after you’ve exhausted your Medicare benefits. This can be a financial lifesaver for those facing long-term illnesses or complicated surgeries.
When it comes to everyday medical expenses under Part B, Plan K kicks in with 50% coinsurance or copayments. Similarly, if you need blood transfusions, the first three pints of blood are also covered at up to 50%. For those in need of hospice care, Plan K takes care of 50% of the Part A hospice care coinsurance or copayments.
Skilled nursing facility care, another crucial service for many older adults, is eligible for 50% coinsurance coverage under Plan K. These facilities often provide essential rehabilitative services following surgery or extended hospital stays, and Plan K’s coverage can substantially reduce the financial burden of these treatments.
In terms of deductibles, Plan K offers 50% coverage for the Part A deductible, making hospital stays slightly less burdensome on your wallet. It’s important to note, however, that Plan K does not cover the Part B deductible or Part B excess charges. These are additional costs that you would have to pay out-of-pocket if your healthcare provider charges more than what Medicare approves.
While Medicare Plan K effectively addresses several healthcare cost gaps, it’s essential to understand its constraints and the financial obligations you may still encounter.
As mentioned earlier, one of the most significant features of Plan K is its annual out-of-pocket limit. Upon reaching this limit, the plan covers all Medicare-approved expenses for the remainder of the calendar year. This feature acts as a safety net and is particularly useful for those managing long-term illnesses or sudden health emergencies.
Plan K does have some exclusions, such as the non-coverage of Medicare Part B deductibles and excess charges.
To maximize the benefits of Plan K, you must monitor your medical spending throughout the year. Being aware of your accumulated expenses relative to the annual out-of-pocket limit can help guide your healthcare choices and spending. Also, make sure to verify whether your healthcare providers accept Medicare assignment to steer clear of excess charges. Opting for providers within the Medicare network mitigates unexpected expenditures.
Deciding to enroll in Medicare Plan K is a significant step toward securing a financial safety net for your healthcare needs. Here’s how to go about the enrollment process:
The Plan K application process can be daunting, but knowing where to apply and what documents you’ll need can ease the experience. Here?s what you need to keep in mind:
If you need help at any stage, you can count on expert guidance to simplify the complexities of the Medigap landscape. Here?s what you can do:
Consult with your healthcare provider directly to find out if they accept Medicare Plan K. Ask your doctor, specialist, or hospital billing departments if they accept this specific Medigap plan. Generally speaking, if a healthcare provider accepts Original Medicare, they will also accept Medigap plans like Plan K. It’s always best to double-check. Regarding the choice of providers, Medicare Plan K typically allows you to choose any doctor or hospital that accepts Medicare.
Generally, you can enroll in Medicare Plan K even with pre-existing health conditions if you apply during the Medigap Open Enrollment Period. This six-month timeframe begins the month you turn 65. During this period, you have guaranteed issue rights, meaning insurance companies cannot deny you coverage based on your health status. If you apply after this period, insurance companies may use medical underwriting, which could result in higher premiums or denial of coverage based on pre-existing conditions.