The ACA Open Enrollment Period for 2027 coverage runs from November 1, 2026, to December 15, 2026 for the federal platform (healthcare.gov) and most states. To have your health insurance coverage active by January 1, 2027, you must complete your enrollment and select a plan by December 15.
The enrollment window is shorter than it has been in previous years, in 2022-2026, the deadline was January 15.
2027 Open Enrollment Dates at a Glance
| Plan type | 2027 enrollment window | What to know |
| ACA Marketplace health plants | November 1, 2026-December 15, 2026 for the federal Marketplace | Some state-based marketplaces may have different deadlines, check dates on the state’s site. |
| Medicare Annual Enrollment Period | October 15-December 7, 2026 | Changes take effect January 1, 2027. |
| Medicare Advantage Open Enrollment Period | January 1-March 31, 2027 | Available to people already enrolled in a Medicare Advantage plan. |
| Employer open enrollment | Usually October or November 2026 | Dates are set by each employer. |
| Dental savings plans | Available year-round | No open enrollment period required. |
No matter how you get your health coverage, open enrollment is your main annual opportunity to choose, renew, or change your insurance for the coming year. It is also a good time to review dental coverage, since dental benefits are typically not included automatically with health insurance.
ACA Marketplace Open Enrollment 2027
The ACA Marketplace is where individuals and families can shop for health insurance if they do not get coverage through an employer, Medicare, Medicaid, or another qualifying source. Depending on your state, you may use HealthCare.gov or a state-based marketplace.
For 2027 coverage, the federal Marketplace open enrollment period begins November 1, 2026, and ends December 15, 2026. Plans selected during that window generally take effect January 1, 2027, as long as the first premium is paid.
Marketplace coverage can be especially important for people who are self-employed, between jobs, working part-time, retiring before Medicare eligibility, or covering family members without access to employer-sponsored insurance. Because rules and deadlines can vary by state, it is wise to review your state’s marketplace before the enrollment window opens.
ACA Dental Coverage During Open Enrollment
Dental coverage is not automatically included in every ACA Marketplace health plan. A few medical plans include dental benefits, while others allow you to add a separate standalone dental plan.
Adult dental coverage is generally optional under the ACA, while pediatric dental coverage is treated differently because it is an essential health benefit for children – you are not required to purchase it, but it must be available for purchase. Marketplace dental plan pricing varies by location, coverage level, network, and benefits, so compare monthly premiums as well as deductibles, waiting periods, annual maximums, and covered services.
Medicare Open Enrollment 2027
Medicare open enrollment is separate from ACA Marketplace open enrollment. Medicare’s Annual Enrollment Period runs October 15 through December 7 each year, including for 2027 coverage.
During this period, Medicare beneficiaries can make changes such as switching from Original Medicare to Medicare Advantage, moving from Medicare Advantage back to Original Medicare, changing Medicare Advantage plans, or changing Medicare Part D prescription drug plans. Changes made during Medicare Annual Enrollment generally take effect January 1.
There is also a Medicare Advantage Open Enrollment Period from January 1 through March 31. This window is only for people already enrolled in a Medicare Advantage plan. During that time, they can switch to another Medicare Advantage plan or return to Original Medicare.
Dental coverage is a key reason to review Medicare options carefully. Original Medicare does not usually cover routine dental care, such as cleanings, fillings, extractions, dentures, or implants. Some Medicare Advantage plans may include dental benefits, but coverage can vary widely by plan, network, annual maximum, and procedure type.
Employer Open Enrollment 2027
Employer open enrollment usually happens in October or November, but the exact timing is set by each employer. This is when employees can review benefit options and decide whether to enroll in, change, or decline medical, dental, vision, life insurance, disability coverage, health savings accounts, flexible spending accounts, and other benefits.
If you miss your employer’s open enrollment deadline, you generally cannot make changes until the next annual enrollment period unless you experience a qualifying life event. That may include getting married, having a baby, losing other coverage, or another major life change recognized by the plan.
Employer dental insurance can be valuable, especially if the premium is affordable and the network includes your preferred dentist. But employer dental plans may still have annual maximums, waiting periods, exclusions, or limited coverage for major procedures. If your dental insurance does not go far enough, a dental savings plan may help reduce out-of-pocket costs and can be used to supplement existing coverage.
What to Do If You Missed Open Enrollment for Dental
Missing open enrollment can feel stressful, but it does not always mean you are out of options. The right next step depends on the type of coverage you need and whether you qualify for a Special Enrollment Period.
A Special Enrollment Period may be available if you experience a qualifying life event, such as losing health coverage, moving, getting married, having or adopting a child, or another eligible change. For Marketplace coverage, you usually have a limited window around the event to enroll or change plans, so it is important to act quickly.
Standalone dental insurance may also be available outside the main health insurance open enrollment window, depending on the plan and where you live. These policies can help with preventive and restorative care, but you should check the details closely. Some dental insurance plans have waiting periods, annual maximums, deductibles, exclusions, or limits on major services.
Dental savings plans are another option because they are available year-round. There is no open enrollment window, and many plans activate quickly, often within a few days. Instead of paying claims like insurance, dental savings plans give members access to reduced rates from participating dentists.
That can be helpful if you need dental care soon, missed a deadline, are between insurance options, or want help with costs that insurance does not fully cover. Dental savings plans typically have no waiting periods, no annual limits, and no claims paperwork, though savings vary by plan, dentist, and procedure.
Frequently Asked Questions
When does open enrollment 2027 start and end?
For states using the federal ACA Marketplace, open enrollment for 2027 coverage starts November 1, 2026, and ends December 15, 2026. Some state-based marketplaces may use different deadlines, so always check your state’s marketplace.
Medicare open enrollment runs October 15 through December 7 each year. Employer open enrollment varies by company, but it often takes place in October or November.
Is there an open enrollment for dental insurance?
It depends on how you get dental coverage. If you are choosing dental benefits through an employer, you usually need to enroll during your employer’s annual open enrollment period. If you are adding dental coverage through the ACA Marketplace, you should review dental options during Marketplace open enrollment.
Some standalone dental insurance plans may be available year-round. Dental savings plans are also available year-round and do not require an open enrollment period.
Can I get dental coverage after open enrollment ends?
Yes, you may still have options after open enrollment ends. If you qualify for a Special Enrollment Period, you may be able to enroll in Marketplace coverage after the deadline. You may also be able to buy a standalone dental insurance plan outside open enrollment, depending on the plan.
Dental savings plans are available at any time. They can be a practical option if you need dental care before the next enrollment period or want help reducing dental costs without waiting for a traditional insurance window.
What qualifies as a special enrollment period for dental?
A Special Enrollment Period is usually triggered by a qualifying life event. Examples may include losing other health coverage, moving, getting married, having a baby, adopting a child, or experiencing certain other changes in household or coverage status.
Rules can vary depending on whether you are enrolling through the Marketplace, an employer, or another coverage source. If you think you qualify, check the deadline right away because enrollment windows are limited. Missed enrollment? You can easily join a dental savings plan whenever you need to reduce the cost of dental care.
