Home › Knowledge › Medicare Supplement (Medigap)
CJ Karrer
Writer · Reviewed by Richard ChanUpdated Jun 12, 2026
8 min read
Medicare Supplement (Medigap) policies are standardized by the federal government, meaning a specific plan letter offers the exact same basic benefits regardless of the insurance company selling it.
While the core benefits of a standardized plan are identical across providers, monthly premiums can vary significantly based on the insurance company's pricing structure and location.
Medigap plans do not include prescription drug coverage, so beneficiaries typically need to purchase a separate stand-alone Medicare Part D plan for medication coverage.
Medicare Supplement Plans, universally known as Medigap Plans, serve as an essential financial shield, providing crucial additional coverage to deeply vulnerable Medicare beneficiaries. The overwhelming challenge for many, however, is accurately comparing the dizzying array of various plans available on the market and confidently finding the one that meets their specific health and budget requirements.
Read on to firmly understand the essential criteria for comparing Medicare Supplement plans and to learn how to identify the best available coverage options for your peace of mind.
Medicare is an incredible federal healthcare program that provides essential, baseline health coverage to senior citizens 65 years and older, alongside those struggling with end-stage renal disease or certain severe disabilities.
Medicare is strategically divided into several parts that cover entirely different aspects of your healthcare needs, including Part A, Part B, Part C, and Part D. However, even with this baseline coverage, beneficiaries must still aggressively budget for heavy deductibles, coinsurance, and copayments in many medical instances.
Put bluntly, Original Medicare does not cover all healthcare expenses. It leaves massive, dangerous "gaps" that can suddenly result in catastrophic out-of-pocket expenses for unprotected enrollees. Medicare Supplement Plans are explicitly designed to close these terrifying gaps and offer beneficiaries true financial safety.
Medicare Supplement Plans are strictly standardized and regulated by the government to flawlessly cover the specific costs that Original Medicare abandons. They are an undeniably brilliant choice for those looking for robust, comprehensive coverage.
Private insurance policies legally offered under the banner of Medicare Supplement (or Medigap) are fundamentally intended to work in flawless conjunction with Original Medicare.
These plans exist purely to assist beneficiaries by covering the heavy out-of-pocket expenses left behind by Medicare. This safely includes covering your deductibles, endless coinsurances, pesky copays, and even emergency medical coverage when traveling outside the US.
Every Medigap plan is federally standardized. This profoundly means that a Plan G sold by one insurance company offers the exact same, legally mandated coverage and benefits as a Plan G sold by a competitor, regardless of the price.
For instance, the legacy Medigap Plan F completely covers Medicare Part A and Part B deductibles and coinsurance in their entirety. The highly popular Medigap Plan G offers a nearly identical level of comprehensive coverage, with the relatively small Medicare Part B deductible being the only exception.
| Plan A | Plan B | Plan C | Plan D | Plan F* | Plan G* | Plan K | Plan L | Plan M | Plan N | |
| Part A coinsurance and hospital costs up to an additional 365 days after Medicare benefits are used up | Y | Y | Y | Y | Y | Y | 50% | 75% | Y | Y |
| Part B coinsurance or copayment | Y | Y | Y | Y | Y | Y | 50% | 75% | Y | Y*** |
| Blood (first 3 pints) | Y | Y | Y | Y | Y | Y | 50% | 75% | Y | Y |
| Part A hospice care coinsurance or copayment | Y | Y | Y | Y | Y | Y | 50% | 75% | Y | Y |
| Skilled nursing facility care coinsurance | Y | Y | Y | Y | 50% | 75% | Y | Y | ||
| Part A deductible | Y | Y | Y | Y | Y | 50% | 75% | 50% | Y | |
| Part B deductible | Y | Y | ||||||||
| Part B excess charge | Y | Y | ||||||||
| Foreign travel exchange (up to plan limits) | 80% | 80% | 80% | 80% | 80% | 80% | ||||
| Out-of-pocket limit** | N/A | N/A | N/A | N/A | N/A | N/A | $6,940 in 2026 | $3,470 in 2026 | N/A | N/A |
Notes: Y = Yes, = Not Covered
* Plans F and G crucially offer a high-deductible option in some states. With this option, you must personally pay for Medicare-covered costs (coinsurance, copayments, and deductibles) entirely out-of-pocket up to the deductible amount of $2,700 in 2026 before your policy finally pays anything. (Be aware: Plans C and F are completely unavailable to people who were newly eligible for Medicare on or after January 1, 2020.)
** For Plans K and L, after you aggressively meet your high out-of-pocket yearly limit and your yearly Part B deductible, the Medigap plan generously pays 100% of covered services for the rest of the calendar year.
*** Plan N reliably pays 100% of the Part B coinsurance, heavily excepting a strict copayment of up to $20 for some routine office visits and up to a $50 copayment for emergency room visits that don't result in inpatient admission.
Medicare Advantage plans and Medicare Supplement Plans are two fundamentally, legally separate entities. Medigap plans fiercely act as a pure complement to Original Medicare, simply paying the bills Original Medicare leaves behind. Medicare Advantage (Part C) plans, on the other hand, are privatized replacements for Original Medicare that offer restrictive networks but tempt consumers with extra benefits like prescription drug coverage, vision, hearing, and dental care.
You can legally choose to enroll in a Medicare Advantage Plan OR purchase Medigap when you first start receiving benefits, but you absolutely cannot legally hold both at the same time.
Because Medigap plans are standardized, it is vital to examine the specific baseline benefits provided by each lettered offering. Advantages can range from basic protection (like Part A coinsurance) to deeply comprehensive protection (like skilled nursing coinsurance and emergency overseas travel).
All Medicare Supplement Plans charge monthly premiums. Depending on the massive level of coverage provided, some comprehensive plans (like G) will have vastly higher premiums than high-deductible variants. You must honestly understand and budget for the specific cost-sharing requirements related to your chosen plan.
Unlike restrictive Medicare Advantage plans, there are absolutely no provider networks for Medicare Supplement plans. Beneficiaries are 100% free to safely choose any healthcare facility or specialist in the country that accepts Original Medicare, meaning you never have to be concerned about network limitations denying you care.
Even though the core medical benefits are standardized, some competing insurance companies might toss in extra features to win your business, such as discounted gym memberships or robust foreign travel insurance.
Besides these key factors, you must ruthlessly consider the following points before locking in a Medicare Supplement plan:
Here are the proven steps necessary for an effective, stress-free comparison of Medicare Supplement plans:
Here are the most important questions you must frankly ask when comparing Medicare Supplement plans:
Examine your fixed monthly income and aggressively determine if you can afford the premiums now—and five years from now.
Know the exact potential out-of-pocket exposure for each plan, including any unpaid Part B deductibles.
Verify if you are currently subject to any pre-existing condition waiting periods because you missed your Open Enrollment window.
Check to securely ensure your preferred, long-time healthcare providers officially accept Original Medicare.
Explore whether the insurer provides any extra perks, like household discounts, that align with your financial needs.
To guarantee you receive reliable coverage, carefully check the financial rating (like A.M. Best) of the insurance provider.
Here are a few trusted, additional resources to guide you while comparing Medicare Supplement plans: