Medicare: What It Is, Eligibility, Income Limits, Costs, Parts A–D & How to Apply

Medicare is the federal health insurance program in the United States to help 65 years old access healthcare services. This program has four parts such as A, B, C, D. Every part offers different health care services. 

You can apply for one or even for all of the insurance programs. Although Part A is free for most of the beneficiaries, some have to pay under specific conditions. And CMS has just announced the premiums, deductibles and coinsurance amounts of 2026. 

So stick by to read the managed care plan options, Medicare 2026 costs and application process. We will discuss the initial enrollment and people who must pay premiums in detail. 

What is Medicare?

Medicare is the federal health coverage program. It is designed to help old age and disabled people access healthcare services in need. Medicare is available in all 50 states of the US, the District of Columbia and US territories.

Medicare has four parts:

• Part A (Hospital Insurance)
• Part B (Medicare Insurance)
• Part C (Medicare Advantage Plans)
• Part D (Drug Coverage)

Medicare Eligibility

You qualify for Medicare if you are:

• 65 or older
• Disable
• Have End-Stage Renal Disease (Permanent Kidney Failure Requiring Dialysis or a Transplant)
• Have ALS ( Lou Gehrig’s disease)

Medicare Part A (Hospital Insurance)

Medicare Part A hospital insurance covers

• Hospital stays
• Nursing care
• Hospice
• Rehabilitation

Part A is free for almost 99% of the people if they have paid taxes. While others have to pay premiums if they don’t meet the work requirements. Apart from this, people with disabilities or serious kidney problems have a different qualification system. Let’s discuss the eligibility for Part A in detail.

Premium-Free Medicare Part A Based on Age

You qualify for free Medicare Part A if:

• Your age is 65 or older
• Getting Social Security Benefits
• Have Railroad Retirement Board (RRB) Benefits
• Worked and Paid Medicare Taxes
• Have enough “quarters” of work ( 40 quarters for 10 years)

These people do not have to file a separate application. They qualify automatically when they turn 65. But if you are not getting these benefits, you have to apply yourself. Medicare coverage begins the month you turn 65. Make sure to apply within 6 months to get coverage on time. But if you apply late after 6 months then Medicare covers only the previous 6 months. For example,

• You apply in November 2026 (after the 6-month window)
• Medicare can go back 6 months
• Retroactive coverage from May 2026 to November 2026
• You will not get benefits of January to April 2026

Medicare Part A for People Who Must Pay a Premium

You have to pay premiums if:

• you did’t paid taxes
• Meet the work quarter limits for CMS

You have to file an application or enroll in a valid enrollment period yourself. Plus, you have to pay premiums for Part B and Part A to keep the coverage.

Medicare Based on Disability  

A disabled person gets benefits within 24 months if they are already getting SSA and RRB benefits. But this time duration is different for government employees. They usually receive Part A benefits after 29 months. Both of these people get free automatic Part A benefits.

ALS (Lou Gehrig’s disease)

People with ALS don’t have to wait to get Medicare benefits. Part A starts the first month they submit the application.

Child Disability

Medicare has different rules for a child with disability. They cannot get Part A benefits before the age of 20. However, there is an exception if they develop ALS. Then Medicare is used at the age of even 18. 

End-Stage Renal Disease (ESRD)

ESRD qualify for premium-free benefits if they:

• receive regular dialysis or a kidney transplant
• Have Social Security and  RRB benefits
• Spouse/child of a person who has enough quarters of work

Part A starts after 3 months when the regular dialysis is started. But you may get in 1 month if you start self-dialysis training or have a kidney transplant. You can also get these benefits for 2 months before transplant if you were in the hospital.

Medicare Part A Premium and Deductible Costs 2026

Here are the premiums and coinsurance costs for 2026:

Medicare Part B (Medical Insurance)

Medical insurance covers the doctor visit, X-ray, laboratory test and outpatient costs. You have to pay a premium of $202.90 in 2026 even if you don’t visit a doctor. There is an increase of $17.90 in 2026 compared to the $185.00 in 2025 premium cost. Likewise, the annual deductible amount of 2026 is  $283 which is high compared to $257 of 2025.

Medicare Part B Premium and Deductibles 2026

Part B Income-Related Monthly Adjustment Amount (IRMAA) 2026

IRMMA is for people who earn a lot of money. So they have to pay a high premium compared to normal people. It only affects 8% of the people and rest pay standard amount. The government use 2 year look back rule to see your income limits.

Full Coverage Part B 

Here is the premiums for single high income people who opt for full Coverage Part B. It means they go for all the medical benefits:

Part B Immunosuppressive Drug Coverage Only

Here are the Part B premium for high income single people. They only use benefits for expensive drugs:

Part B Full Part B Coverage & Immunosuppressive Drug 

Here are the premiums of full coverage and immunosuppressive drugs for married high-income people who file separately:

Medicare Part C (Advantage Plans)

Medicare Part C is also known as an Advantage Plan. It is a private insurance plan that covers the benefits of both Part A and Part B (sometimes even Part D). Advantage plan is different from original Medicare and includes extra benefits like:

• Vision coverage
• Dental coverage
• Hearing coverage
• Transportation
• Fitness benefits

More than half of the people apply for advantage plans every year. They limit the doctors and hospitals you can visit. Every state has different active plans. For example, there were about 42 plans in 2025 throughout the US. But they are reduced to 32 in 2026. Insurance companies decide which plans will be active in a specific state. If you were receiving benefits and your plan is not available anymore. Then you have to switch to the active ones in your state.

There are five types of Medicare Advantage Plans in 2026:

1. Health Maintenance Organizations (HMOs) 
2. Preferred Provider Organizations (PPOs)
3. Special Needs Plans (SNPs)
4. Medicare Medical Savings Accounts (MSAs)
5. Private Fee-for-Service Plans (PFFS)  

How to Choose an Advantage Plan in your Area?

Here are the steps to choose a Medicare Part C advantage plan:

1. Visit the Medicare.gov website’s plan page
2. Enter your ZIP code and tap on continue
3. (No login required at all)
4. Choose the advantage plan from options
5. Check the box if you are getting any benefits 
6. You can also compare the drug costs
7. Enter the first and last names of the plan providers

Then an interface pops up where you can choose everything from benefits to provider and even drug coverage. Apply the filters to see the available plan in your area. You can also read the plan details like premium and deductible amount via the “Plan Detail” button.

Medicare Plan C Cost

Every advantage plan and insurance provider has different premiums and deductibles. You have to choose your plan provider and other benefits to see these details.

Find your plan here.

Medicare Plan D (Drug Coverage)

Medicare Plan D is also known as “Drug Prescription Coverage”. It covers:

• Tablets
• Injections
• Insulin
• Other prescription medicines

Most of the medicare plans include drug coverage. It is present in many advantage plans or you can add it optionally in Part A and Part B benefits. So you don’t have to apply separately. Plan D premium very from plan to plan. But the deductible amount is $615 for plan D in 2026. Medicare cut the premiums of Part A, B and D from your Social Security check.

Rich people pay more premiums for plan D than those on a minimum income plan. So here are the is extra amount that single rich people have to  pay with premiums:

Here is the IRMAA for married rich people who file separately:

How to Choose a Plan D plan:

• First check the formulary list to see if your medicines are listed
• Then check the Medicare-approved pharmacies (if they are in range)
• Then find the medicine coverage provider here

Stages of Plan D Coverage

Medicare drug prescription plan covers medicine costs in three stages:

• Deductible Stage

You have to pay the $615 deductible amount first to activate your Medicare benefits.

• Initial Coverage Stage

When you pay the deductible amount, then the cost sharing system starts. You have to pay small amounts like $10 or $30 dollars with Medicare benefits.

• Catastrophic Stage 

When you spend almost $2,100 out of your own pocket then stop. Medicare covers all the expenses after that and you don’t have to pay anything.

Medicare Supplemental Insurance (Medigap) 

Medical Supplemental insurance is an extra insurance system. It helps you pay costs that Original Medicare (Part A and Part B) doesn’t cover. You have to get a Medigap plan and pay a private company to get these benefits. They help you pay less out-of-pocket and get these benefits. You cannot get a Medigap plan with Advantage plans. 

1. Visit this website to find Medigap plans in your area
2. Enter your ZIP code and tap on “browse plans”
3. All the available plans pop up with monthly premiums
4. Tap on “Start Application” to get your favourite plan

How to Find a Medicare Provider Near You?

You can find a Medicare service provider near you by visiting this website.

• Select the category from the left menu such as hospital, nurse, dialysis centers
• Enter your ZIP code and the keyword (e.g hospital)
• The website provide detail of the hospital near you 
• You get distance, location, name and phone number of providers

You can also find the total number of providers in your state here. Just scroll down and hover on your state on the map to find the number of providers.

How To Apply For Medicare?

There are three ways to apply for Medicare Program:

1. Visit ssa.gov and select “Apply for Medicare.”
2. Call the SSA at 1-800-772-1213  (Monday through Friday, 8 a.m. to 7 p.m)
3. Visit your local Social Security Administration office

Find your SSA office here

Medicare Application Process

Here are the steps to fill out the application:

1. Create an account at SocialSecurity.gov
2. Tap on the “Apply for Benefits” option
3. Check in the age, benefits and SSI options
4. The website checks if you are eligible and list the required documents
5. Below that you have to tap on “Apply Online”
6. Application begins and you just have to follow the onscreen prompts

Here are the required documents:

• Social Security Card (or number)
• Birth Certificate
• Proof of U.S. citizenship 
• W-2 forms or self-employment tax returns for the past year
• Current health insurance details  

After the submission team reviews your application and lets you know via email. You can track your Medicare application here. However, this process takes a few weeks to months. You can check how many months 

How do I Sign Up for Medicare?

You can easily sign up for Medicare at the website. Just tap on Apply Now and you will land on the application as mentioned above. Here is the medicare phone number (1-800-633-4227). TTY users can call 1-877-486-2048.

Conclusion

The Medicare insurance program is designed to help aged people access healthcare services. It has four main parts such as A, B, C, D. Every part has its own eligibility and premium costs. You have to pay a specific amount as mentioned above (deductibles) to get Medicare benefits. 

Medigap supplement insurance helps you pay less out of your pocket. You can easily apply for Medicare via the social security website. It takes 45 to 60 days depending on the type of Medicare program. So make sure to track your application.

FAQs

What is Medicare vs Medicaid​?

Medicare is a specific program only for people above 65 years and disabled. But Medicaid is designed for all low-income households to help them access healthcare services.

What is Medicare Open Enrollment 2026?

Medicare open enrollment for 2026 was from October 15 to December 7, 2025. It allowed people to review, change and switch their plans.

Is Aetna Medicare Advantage Plans about to Closeout in 2026​?

Aetna is dropping nearly 90 Medicare Advantage plans across 34 states for 2026. You have to apply in other Medicaid Plans if it’s not available in your area. You can find an Aetna Pharmacy near you here.