Can You Change Health Insurance After Open Enrollment? 2027 Special Enrollment Period Rules

Posted on September 16, 2026 by Neal Shanske | Category: ACA Marketplace

If you miss Open Enrollment, you generally cannot simply decide a few weeks later that you want a different Marketplace health plan. Outside the annual enrollment window, most people need a qualifying life event that creates a Special Enrollment Period.

That does not mean you are necessarily stuck until next year. Losing job-based insurance, moving, getting married, having a baby, aging off a parent’s plan and several other events can reopen the Marketplace. The important part is knowing which events qualify and acting before the enrollment window closes.

This article covers individual and family coverage through the Affordable Care Act Marketplace. Employer plans and Medicare have their own enrollment rules.

Can You Change Health Insurance After Open Enrollment?

Yes, but usually only if you qualify for a Special Enrollment Period, often abbreviated SEP.

A Special Enrollment Period is a temporary enrollment window triggered by certain changes in your life. Depending on the event, it can allow you to enroll in Marketplace coverage for the first time or change an existing Marketplace plan.

Most Special Enrollment Periods give you about 60 days around the qualifying event. Some let you enroll before the event occurs, while others begin afterward. Medicaid and the Children’s Health Insurance Program, or CHIP, are different: you can apply for those programs throughout the year.

When Does 2027 Open Enrollment End?

For states using HealthCare.gov, current federal Marketplace guidance shows Open Enrollment for 2027 coverage running from November 1, 2026 through January 15, 2027. Enrolling by December 15 generally gives you coverage beginning January 1; later enrollment generally produces a February 1 start.

This deserves clarification because older 2027 guidance may say December 15 is the final enrollment deadline. A federal rule had shortened the HealthCare.gov enrollment period, but a court later vacated that change. Check HealthCare.gov’s current dates and deadlines before relying on an older article or calendar.

State-run Marketplaces can have different enrollment schedules, so use your state’s official exchange if you do not enroll through HealthCare.gov.

What Counts as a Qualifying Life Event?

The most common qualifying life events fall into four broad categories: losing health coverage, changes in your household, moving, and certain other changes in eligibility or circumstances.

Losing Health Insurance

Losing qualifying health coverage is one of the most common reasons for a Special Enrollment Period. You can generally qualify if you lost coverage within the past 60 days or expect to lose it within the next 60 days.

Examples include:

Losing employer-sponsored health insurance
Losing coverage through a spouse’s or parent’s employer
Turning 26 and aging off a parent’s health plan
Losing eligibility for an individual health plan
Losing student health coverage
Losing Medicare eligibility in certain circumstances
Losing Medicaid or CHIP eligibility

If you know job-based coverage is about to end, do not wait until you are uninsured to begin the process. The Marketplace generally permits enrollment during the 60 days before the coverage loss, which can make it much easier to avoid a gap.

Losing Medicaid or CHIP

The timing is more generous if you lose Medicaid or CHIP. HealthCare.gov currently allows up to 90 days after the loss of Medicaid or CHIP to select a Marketplace plan.

You can also apply before that coverage ends if you know you are about to lose eligibility. This commonly occurs after a change in household income, a child aging out of CHIP, or a state eligibility review.

Getting Married

Marriage can create a Special Enrollment Period. You generally have 60 days after getting married to enroll.

Coverage can usually begin on the first day of the month after you select a plan. The Marketplace may ask for documentation of the marriage and, depending on the circumstances, evidence of prior health coverage.

Having or Adopting a Baby

The birth or adoption of a child creates one of the more flexible Special Enrollment Periods. You generally have 60 days after the event to enroll.

Marketplace coverage can be made effective as of the date of birth or adoption, even if you enroll afterward. That retroactive start is important because medical expenses can begin immediately.

If you already have Marketplace insurance, adding a baby does not necessarily mean every member of the family can freely switch to any plan. Your Marketplace eligibility results will show which changes are permitted for the existing household and the new child.

Divorce or Legal Separation

Divorce by itself does not automatically create a Special Enrollment Period. It generally qualifies when the divorce or legal separation causes you to lose health insurance.

If you remain covered after the divorce, the divorce alone does not normally provide a midyear opportunity to replace your Marketplace plan.

Moving

A permanent move can qualify if you move to a new ZIP code or county, move to the United States from another country or U.S. territory, or make certain moves involving school, seasonal work or transitional housing.

A vacation or temporary move for medical treatment does not count. For many domestic moves, you may also need to show that you had qualifying health coverage for at least one day during the 60 days before moving.

HealthCare.gov may request proof of both the move and your prior coverage, such as a lease, utility bill, insurance correspondence or similar records.

Death of a Household Member

If someone on your Marketplace plan dies and that change causes you to lose eligibility for your existing plan, you may qualify for a Special Enrollment Period.

As with divorce, the important issue is not simply that the event happened. It is how the event changes your coverage or household eligibility.

Does Losing Your Job Qualify?

If losing your job also causes you to lose employer health insurance, yes. The loss of the coverage is what creates the Marketplace Special Enrollment Period.

You do not have to wait until your former employer’s plan actually terminates to start looking. If you know the coverage end date, you can usually apply during the 60 days before it ends.

This is also the point at which many people compare a Marketplace plan with COBRA. COBRA lets you continue the employer plan, while the Marketplace lets you shop for individual coverage and potentially qualify for premium tax credits.

What If You Take COBRA?

Choosing COBRA requires some care because voluntarily dropping it later generally does not create another Special Enrollment Period.

If COBRA reaches the end of its permitted coverage period or you lose it involuntarily, you can generally qualify for a Marketplace SEP. But if you simply decide several months later that COBRA is too expensive and cancel it, you may have to wait until the next Open Enrollment unless another qualifying event applies.

That makes it worth comparing COBRA and Marketplace coverage before the original 60-day Marketplace window closes.

Can You Switch Plans Just Because Your Premium Went Up?

Usually not. A higher premium, bigger deductible or dissatisfaction with your insurer does not by itself create a Special Enrollment Period.

The same applies if you simply chose the wrong plan during Open Enrollment and later regret it. Unless you experience a qualifying event, you generally keep the plan until the next Open Enrollment period.

Does a Change in Income Let You Enroll Anytime?

Do not assume that it does. Changes in income can affect your subsidy, Medicaid eligibility and sometimes your eligibility for Marketplace coverage, but there is no general rule allowing everyone to enroll whenever their income changes.

There is also an important 2027 change. The monthly Special Enrollment Period that previously allowed some people with income at or below 150% of the federal poverty level to enroll throughout the year is no longer available for 2027. You generally need another valid enrollment basis, such as a qualifying life event.

If your income changes while you already have Marketplace coverage, report the change promptly. Your premium tax credit is based on projected annual household income, and failing to update it can leave you receiving too much or too little financial assistance.

How Long Do You Have to Enroll?

For most qualifying life events, think in terms of a 60-day window. The exact timing varies by event.

Event	Typical enrollment window
Loss of qualifying health coverage	60 days before or 60 days after the loss
Loss of Medicaid or CHIP	Up to 90 days after loss; advance enrollment may also be available
Marriage	Usually 60 days after marriage
Birth, adoption or foster placement	Usually 60 days after the event
Qualifying permanent move	Usually 60 days after the move

Do not treat the 60-day rule as permission to wait until day 59. Documentation problems can delay enrollment, and missing the deadline can leave you without another Marketplace enrollment opportunity until Open Enrollment.

You May Have to Prove the Qualifying Event

A Marketplace application can require documents confirming why you qualify for the Special Enrollment Period. For loss of coverage, HealthCare.gov requires documentation showing the coverage and the date it ended or will end.

If documents are requested, HealthCare.gov generally gives you 30 days after selecting a plan to submit them. Coverage cannot be used until the Marketplace confirms eligibility and you pay the first premium.

You can review the current documentation rules on the HealthCare.gov Special Enrollment confirmation page.

There has been substantial litigation over expanded verification requirements for 2027. As of September 2026, a federal court has stayed the new rule that would have expanded verification to at least 75% of new Special Enrollment enrollments on the federal platform. Existing verification for loss-of-coverage SEPs remains in place.

What If the Marketplace Says You Do Not Qualify?

First check whether the problem is missing documentation. If the Marketplace asks you to verify the event, submitting acceptable records may resolve the issue without an appeal.

If the Marketplace ultimately determines that you are not eligible for a Special Enrollment Period, that decision can generally be appealed. HealthCare.gov ordinarily gives you 90 days from the date of your Eligibility Notice to request an appeal.

What If You Missed Open Enrollment and Have No Qualifying Event?

Your options are much more limited, but check Medicaid and CHIP before assuming you must remain uninsured. Both programs accept applications throughout the year, although eligibility depends on income, household circumstances and state rules.

You may also later become eligible for a Special Enrollment Period if your circumstances change. Losing other coverage, getting married, having a child or making a qualifying move can create a new enrollment opportunity even if you previously missed Open Enrollment.

What you generally cannot do is manufacture an SEP simply because you now want coverage or want a different plan.

The Practical Rule: Act as Soon as the Event Happens

If you know you are losing coverage, start before the old policy ends. If you have already experienced a qualifying event, do not assume you have months to decide.

Most Special Enrollment Periods are short, and the Marketplace may need documentation before the coverage can be used. The safest approach is to update your Marketplace application as soon as the event occurs, review the eligibility determination, select a plan promptly and submit any requested proof without waiting for the deadline.

Open Enrollment is the easiest time to buy or change individual health insurance. A qualifying life event gives you another chance during the year—but it is a window, not an open-ended exception.