Yes, you can get Medicare back if you dropped it. Re-enrollment runs through Social Security for Parts A and B, and through a private insurer for Part C or Part D, but the window you use, the penalty you pay, and whether you can still buy affordable supplemental insurance depend on which part you dropped and how long you went without coverage.
The Enrollment Windows That Let You Back In
Three windows control re-enrollment in Original Medicare.
A Special Enrollment Period is the cleanest path back. It’s triggered by specific life events, most often losing health coverage through a current employer, and it usually shields you from late penalties. You can enroll while the employer coverage is active or within eight months after it ends.1Social Security Administration. How to Apply for Medicare Part B During Your Special Enrollment Period
The General Enrollment Period runs January 1 through March 31 each year. It’s the fallback when no SEP applies. Coverage starts the month after you sign up.2Social Security Administration. When to Sign Up for Medicare
The Annual Enrollment Period, October 15 through December 7, is where you re-join a Medicare Advantage or Part D plan. It doesn’t apply to Original Medicare. Coverage takes effect January 1.3Medicare. Open Enrollment
Getting Part B Back
Part B is where re-enrollment mistakes hurt the most, because the late penalty is permanent.
Through a Special Enrollment Period
If you dropped Part B because you had coverage through your own or a spouse’s current employer, you can re-enroll penalty-free while that coverage is active or within eight months after the job or the plan ends, whichever comes first.1Social Security Administration. How to Apply for Medicare Part B During Your Special Enrollment Period
The employer generally must have 20 or more employees. At smaller companies, Medicare is the primary payer and the group plan is secondary, so the group plan doesn’t qualify you for the SEP.4Centers for Medicare & Medicaid Services. Small Employer Exception
Through the General Enrollment Period
Without an SEP, you wait for January 1 through March 31 and coverage begins the following month. You’ll owe a late enrollment penalty: 10% added to your monthly premium for every full 12-month period you could have been enrolled but weren’t. The surcharge stays with you for as long as you have Part B.5Medicare. Avoid Late Enrollment Penalties
The standard Part B premium is $202.90 per month in 2026. A three-year delay means a 30% surcharge, roughly $60.87 added to every monthly bill for the rest of your life.6Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
The COBRA Trap
COBRA continuation coverage does not count as coverage through a current employer. Your eight-month SEP window starts when the job or the employer coverage ends, not when COBRA runs out. Stay on COBRA for 18 months and then try to sign up for Part B, and you’re already 10 months past your SEP, facing penalties and a coverage gap.7Medicare. COBRA Coverage
Once you’re Medicare-eligible, COBRA may only pay a small portion of your care, leaving you responsible for most of the cost. The safe move is to enroll in Part B as soon as your employment ends or within the eight-month window, whether or not you elect COBRA.
Getting Part A Back
If you or a spouse paid Medicare taxes for at least 10 years (40 quarters), Part A is premium-free and re-enrollment is straightforward. You can sign up at any time after age 65 through Social Security, and coverage can be applied retroactively for up to six months.8Centers for Medicare & Medicaid Services. Original Medicare (Part A and B) Eligibility and Enrollment
If you don’t qualify for premium-free Part A, you’ll buy it during a valid enrollment period, typically the General Enrollment Period. In 2026, the monthly premium is $565 with fewer than 30 quarters of work history, or $311 with 30 to 39 quarters.6Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles The late enrollment penalty adds 10% to the premium, and you pay it for twice the number of years you delayed. Wait three years and you pay the higher premium for six.5Medicare. Avoid Late Enrollment Penalties
One boundary to know: if you’re already receiving Social Security retirement benefits, you generally cannot drop premium-free Part A without giving up those benefits. Only premium Part A can be canceled outright. Part B can be canceled at any time.9Social Security Administration. Manage Your Medicare Benefits
Getting Part D and Medicare Advantage Back
Medicare Advantage and Part D drug plans are sold by private insurers, so the calendar is different. The main window is the Annual Enrollment Period, October 15 through December 7, with coverage starting January 1.3Medicare. Open Enrollment Certain life events, such as moving out of your plan’s service area or losing other creditable coverage, open a Special Enrollment Period.
If you’re rejoining Part D after a gap, dig up any creditable coverage notices from former employers or insurers. These annual notices, typically sent each September, tell you whether prior drug coverage was at least as good as Medicare’s standard benefit, and they’re the proof you’ll need to avoid a late penalty.10Medicare. Notice of Creditable Coverage
What Late Enrollment Actually Costs
Penalties are the real price of dropping Medicare and coming back later. For Part B and Part D, they’re permanent.
Part A penalty. Applies only to premium Part A. Adds 10% to the monthly premium, paid for twice the number of years you delayed. It eventually ends.5Medicare. Avoid Late Enrollment Penalties
Part B penalty. Adds 10% for each full 12-month period you could have had Part B but didn’t, and never goes away. On the 2026 base premium of $202.90, a two-year delay adds about $40.58 per month permanently. The penalty is calculated on the base premium even if higher income puts you in a higher bracket.5Medicare. Avoid Late Enrollment Penalties
Part D penalty. Triggered if you go 63 or more consecutive days without creditable drug coverage after your initial enrollment period. It’s 1% of the national base beneficiary premium ($38.99 in 2026) multiplied by the number of full uncovered months, rounded to the nearest ten cents. Someone who went 24 months without creditable coverage owes 24% of $38.99, or about $9.40 per month, for as long as they have Part D.11Medicare. How Much Does Medicare Drug Coverage Cost?5Medicare. Avoid Late Enrollment Penalties
Higher-income enrollees also pay an Income-Related Monthly Adjustment Amount on top of any late penalty. In 2026, IRMAA starts at modified adjusted gross income above $109,000 for individuals or $218,000 for joint filers, and can add $81.20 to $487.00 per month to Part B alone.6Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
The Medigap Consequence Most People Miss
Medigap policies help cover the copayments and deductibles that Original Medicare leaves behind. Your ability to buy one at a standard price is tied to a single window that doesn’t reopen.
When you first enroll in Part B at age 65 or older, you get a one-time, six-month Medigap open enrollment period. During those six months, insurers must sell you any Medigap policy they offer at the standard price, regardless of your health history.12Centers for Medicare & Medicaid Services. Timing of the Six-Month Medigap Open Enrollment Period After that, insurers in most states can medically underwrite. They can deny you, charge more based on health conditions, or exclude pre-existing conditions.
If you dropped Medicare, re-enrolled, and your original six-month window has closed, you’ll usually face underwriting when shopping for a Medigap plan. The exceptions are guaranteed issue rights, which arise in specific situations:
- Trial right: if you dropped a Medigap policy to try Medicare Advantage for the first time, you have 12 months to switch back to Original Medicare and get your old Medigap policy back, or a comparable one if it’s no longer sold.13Medicare. Learn How Medigap Works
- Plan discontinuation: your Medicare Advantage or Medigap insurer leaves Medicare, exits your service area, or goes bankrupt.
- Employer coverage ending: you had Original Medicare plus an employer or union plan that paid after Medicare, and that group coverage is ending.
Roughly nine states have a “birthday rule” or similar provision letting you switch Medigap plans around your birthday each year without underwriting. Rules vary, so check with your state insurance department before dropping or switching a Medigap policy.
If You Have a Health Savings Account
Re-enrolling in any part of Medicare drops your HSA contribution limit to zero. That includes retroactive Part A coverage. If Part A applies retroactively for up to six months, you cannot have HSA contributions for any of those months.14Internal Revenue Service. Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans
Contributions made during months later covered by retroactive Medicare become excess contributions. To avoid the 6% excise tax, withdraw the excess (plus any earnings) before your tax filing deadline, including extensions. The withdrawn amount is taxable income. If you’re 65 or older, you avoid the 20% additional tax that hits younger account holders, but income tax still applies.
How to File for Re-enrollment
For Parts A and B, apply through the Social Security Administration: online at ssa.gov, by phone at 1-800-772-1213, or at a local Social Security office.15Social Security Administration. Sign Up for Medicare
If you’re claiming a Special Enrollment Period based on employer coverage, submit two forms with your application: Form CMS-40B (the Part B enrollment application) and Form CMS-L564 (the request for employment information that your employer completes). Both go to your local Social Security office together.16Medicare. Enrollment Forms17Centers for Medicare & Medicaid Services. CMS-L564 Request for Employment Information
For Medicare Advantage or Part D, use the Medicare Plan Finder at medicare.gov to compare plans in your area, then enroll with the private insurer directly or by calling 1-800-MEDICARE. Time your enrollment to minimize any gap in drug coverage. Even a short lapse can trigger the Part D late penalty.
When a Government Mistake Caused Your Gap
If you missed an enrollment period because of incorrect information from a Social Security employee, a Medicare representative, or another federal agent, you may qualify for equitable relief. It can waive late penalties or restore enrollment rights. Three things have to line up: a government error or misinformation, actual harm to your Medicare enrollment rights, and evidence documenting the error.18Social Security Administration. Conditions for Providing Equitable Relief Personal hardship or a sympathetic reason for missing the deadline isn’t enough on its own. There has to be a traceable government mistake. If an employer or insurer passed on bad information that originated with a federal source, that qualifies too. Bring any written communications or notes from your interactions when you file the request with Social Security.