If you are asking when open enrollment for dental insurance is for 2027, the answer depends on where the plan comes from. A marketplace dental plan, an employer plan and a Medicare Advantage plan each use different dates. This guide lists every window, the deadline that matters most, and what to do if you miss it.
Key facts
- Marketplace Open Enrollment for 2027 coverage starts November 1, and December 15 is the last day to enroll or change plans for coverage that starts January 1 (HealthCare.gov, 2026).
- Marketplace Open Enrollment ends January 15, and coverage for enrollments from December 16 through January 15 starts February 1 (HealthCare.gov, 2026).
- Medicare Fall Open Enrollment for Medicare Advantage and Part D runs October 15 to December 7, with coverage starting January 1 (Medicare.gov, 2026).
- Original Medicare does not cover routine dental such as cleanings, fillings or extractions (Medicare.gov, 2026).
- Dental coverage is an essential health benefit for children but not for adults, so adult dental is not required in a marketplace health plan (HealthCare.gov, 2026).
When is open enrollment for dental insurance for 2027?
Dental open enrollment for 2027 depends on the plan source. For marketplace plans it runs November 1, 2026 to January 15, 2027, and December 15 is the cutoff for a January 1 start (HealthCare.gov, 2026).
Here are the main windows side by side.
| Where your dental plan comes from | Enrollment window | Coverage starts |
|---|---|---|
| Marketplace (HealthCare.gov) | November 1 to January 15 | January 1 if you enroll by December 15, otherwise February 1 (HealthCare.gov, 2026) |
| Medicare Advantage plan with dental | October 15 to December 7 | January 1 (Medicare.gov, 2026) |
| Medicare Advantage Open Enrollment | January 1 to March 31, only if already in an Advantage plan | First of the month after the plan gets your request (Medicare.gov, 2026) |
| Employer dental plan | Set by your employer, usually in the fall | Set by your employer |
| Federal employees (FEDVIP) | Federal Benefits Open Season in November and December (OPM, 2026) | See BENEFEDS for exact dates |
HealthCare.gov states Open Enrollment as November 1 to January 15 each year on its dental page, and its dates page names December 15 as the last day to pick coverage for January 1 (HealthCare.gov, 2026). State marketplaces can use different dates, so check your state exchange.
Can I buy a marketplace dental plan on its own?
No. You cannot buy a marketplace dental plan unless you buy a health plan at the same time (HealthCare.gov, 2026). Dental is sold as an add-on during the same enrollment window.
That is why dental open enrollment 2027 is really the health open enrollment window. Dental coverage is an essential health benefit for children, so a dental option must be available for a child, either inside a health plan or as a separate plan, but you do not have to buy it (HealthCare.gov, 2026). For adults, dental is not an essential health benefit, so many health plans leave it out.
You pay a separate premium for a stand-alone dental plan. Some stand-alone plans have waiting periods for adults, so you pay premiums while coverage has not started (HealthCare.gov, 2026). Ask the insurer before you enroll.
Does Medicare cover dental?
Original Medicare does not cover routine dental such as cleanings, fillings or tooth extractions (Medicare.gov, 2026). Some Medicare Advantage plans add dental, which is why people shop for dental during the Medicare fall window.
Medicare Fall Open Enrollment for Advantage and Part D plans runs October 15 to December 7, and coverage starts January 1 (Medicare.gov, 2026). The plan must get your request by December 7. If you are already in an Advantage plan, you can change plans from January 1 to March 31 (Medicare.gov, 2026).
Our guide to Aetna Medicare Advantage states leaving covers what to do if your plan is ending in your area.
What if I miss dental open enrollment?
You generally wait for the next open enrollment unless you qualify for a Special Enrollment Period. A marketplace Special Enrollment Period lasts 60 days after events such as marriage, birth, adoption, loss of health coverage or the end of COBRA (HealthCare.gov, 2026).
You can cancel a separate dental plan at any time and keep your health plan. If your health plan includes dental, you cannot remove it on its own and must change health plans in Open Enrollment or a Special Enrollment Period (HealthCare.gov, 2026). Our special enrollment period guide lists the qualifying events, and our COBRA alternatives guide helps if you are losing job coverage.
Is dental insurance worth it? A worked example
Dental insurance pays off when you expect more than a cleaning. Here is a hypothetical comparison with made-up numbers, so you can follow the math.
A plan costs $45 per month, or $540 per year. It pays 100% of two cleanings and 50% of a $1,100 crown after a $50 deductible. The plan has a $1,500 yearly maximum.
| Item | With the plan | Without a plan |
|---|---|---|
| Premiums for the year | $540 | $0 |
| Two cleanings ($120 each) | $0 | $240 |
| Crown ($1,100) | $575 (the $50 deductible plus half of the remaining $1,050) | $1,100 |
| Total for the year | $1,115 | $1,340 |
In this example the plan saves $225. With no crown and just two cleanings, the plan costs $540 while the cleanings alone cost $240, so you lose $300. The decision turns on expected work, waiting periods and the yearly maximum, so read the plan summary first.
What about dental through an employer?
Employer dental open enrollment is set by your employer, not by federal law, so ask HR for your dates. Most employer plans take your share of the premium out of your paycheck.
If your employer runs a Section 125 cafeteria plan, your dental premium can come out pre-tax, which skips the 7.65% FICA payroll tax on those dollars (IRS, Tax Topic 751, 2026). Our open enrollment employer guide explains how employers set their dates, and our health and dental insurance guide for small businesses covers employer plan options.
What should I do before the deadline?
Use this free checklist and finish before December 15 if you want January 1 coverage.
- Write down your dental needs. Include any crowns, braces or planned work.
- List your dentists. Check that each is in the plan network.
- Compare the yearly maximum and waiting periods. These decide what the plan is worth.
- Check your deadline. December 15 for marketplace January 1 coverage, December 7 for Medicare Advantage.
- Enroll and pay the first premium. Coverage does not start until the first premium is paid (HealthCare.gov, 2026).
Medically reviewed by Jawad Arshad, MD, FACEP. Last reviewed: October 11, 2026.
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Frequently Asked Questions
When is open enrollment for dental insurance for 2027?
When does dental open enrollment end?
Can I get dental insurance outside open enrollment?
Can I buy a dental plan without a health plan?
Does Medicare cover dental open enrollment plans?
Sources: HealthCare.gov, Dates and Deadlines for 2027 coverage (2026); HealthCare.gov, Dental Coverage in the Health Insurance Marketplace (2026); HealthCare.gov, Special Enrollment Period (2026); Medicare.gov, Joining a Plan (2026); Medicare.gov, Dental Services (2026); U.S. Office of Personnel Management, Dental and Vision Insurance (2026); IRS, Tax Topic 751 (last reviewed September 24, 2026). The dental plan example uses made-up numbers for illustration.