You can switch health insurance at two main points: The annual Open Enrollment Period is the one time each year ACA Marketplace enrollees can add, change or drop health insurance without a qualifying reason. Outside these windows, your options depend on your coverage type. Employer-sponsored plans follow their own schedules set by HR departments. Medicare has separate windows for different plan types. Medicaid and CHIP accept applications year-round.
Can You Switch Health Insurance at Any Time?
Updated: June 20, 2026
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Key Takeaways
HealthCare.gov sets the ACA Marketplace Open Enrollment window at Nov. 1 through Jan. 15 each year.
A qualifying life event gives you 60 days to switch Marketplace or employer health insurance outside Open Enrollment.
Most employer plans set their own Open Enrollment window, usually held in the fall.
Medicaid and CHIP accept applications year-round, with no enrollment window required.
When Can You Switch Health Insurance?
When Can You Switch Plans During Open Enrollment?
The annual Open Enrollment Period is the one time each year anyone can add, change or drop health insurance without a qualifying reason. For ACA Marketplace plans, it runs Nov. 1 through Jan. 15. Enroll by Dec. 15 and coverage starts Jan. 1. Enroll between Dec. 16 and Jan. 15 and coverage starts Feb. 1.
ACA Marketplace | Nov. 1–Jan. 15 (coverage starts Jan. 1 or Feb. 1) |
Medicare | Oct. 15–Dec. 7 (Annual Enrollment Period) |
Employer-Sponsored | Set by employer, usually in the fall (confirm dates with your HR department) |
Can You Switch Health Insurance Outside Open Enrollment?
Outside Open Enrollment, Marketplace and employer plan changes require a Special Enrollment Period. Medicaid and CHIP have no enrollment window. Both accept applications year-round through your state agency or Benefits.gov.
Short-term health insurance doesn't meet ACA minimum coverage standards and excludes pre-existing conditions. If you recently lost job-based coverage, review COBRA alternatives first.
What Qualifies You for a Special Enrollment Period?
A Special Enrollment Period opens for 60 days after a qualifying life event, per HealthCare.gov. This window lets you add, change or drop coverage outside the standard Open Enrollment Period. The event must be documented. HealthCare.gov requires proof such as a marriage certificate, birth record or a letter confirming loss of coverage. Miss the 60-day window and you wait for the next Open Enrollment Period unless a second qualifying event occurs first.
Loss of job-based coverage | 60 days |
Marriage | 60 days |
Birth or adoption of a child | 60 days |
Permanent move to a new coverage area | 60 days |
Income change affecting plan eligibility | 60 days |
Gaining citizenship or lawful presence | 60 days |
Loss of job-based coverage triggers a SEP on the date coverage ends. That date starts the 60-day enrollment window. Permanent moves also qualify, but only when the new location falls outside the current plan's service area.
A permanent move qualifies as a SEP trigger only when your new location falls outside your current plan's service area. Call your insurer to confirm service area coverage before your move date. If your new address is outside the network, you have 60 days from the move to enroll in a new plan.
MONEYGEEK EXPERT TIP
The 60-day Special Enrollment Period window starts on the date of your qualifying event, not the date you report it. Submit your documentation to HealthCare.gov right away
Can You Switch Employer Health Insurance at Any Time?
Employer-sponsored health insurance follows its own Open Enrollment window, which most companies schedule in the fall for coverage starting Jan. 1. New employees can enroll within 30 to 60 days of their hire date, according to the Department of Labor. Outside that window, you can only change employer coverage if a qualifying life event occurs, such as marriage or the addition of a new dependent. Confirm your plan's enrollment dates with your HR department, as dates vary by employer.
MONEYGEEK EXPERT TIP
New employees who miss the 30- to 60-day enrollment window must wait for their employer's next Open Enrollment Period unless a qualifying life event applies. Ask HR for your enrollment deadline on your first day of work.
Can You Switch Medicare Plans at Any Time?
Medicare enrollment windows vary by plan type. The Annual Enrollment Period (Oct. 15 through Dec. 7) covers switches between Original Medicare and Medicare Advantage and changes to Part D drug plans. Medicare Advantage has a separate Open Enrollment window from Jan. 1 through March 31.
Medicare Supplement plans, also called Medigap, require medical underwriting outside guaranteed issue periods. Switching from Medicare Advantage to Medigap has its own timing and eligibility requirements.
Original Medicare (Parts A & B) | Initial Enrollment: 7-month window around your 65th birthday | Late enrollment penalty may apply |
Medicare Advantage (Part C) | Annual Enrollment: Oct. 15–Dec. 7; OEP: Jan. 1–March 31 | OEP allows one switch back to Original Medicare |
Medicare Supplement (Medigap) | Open Enrollment: 6 months after Part B starts | Medical underwriting may apply outside this window |
Medicare Part D (Prescription Drug) | Annual Enrollment: Oct. 15–Dec. 7 | Late enrollment penalty applies if you delay |
The most consequential switch on this table is from Medicare Advantage back to Original Medicare. Outside the OEP window (Jan. 1 through March 31), Medigap insurers can require medical underwriting. A serious pre-existing condition can make the switch costly or unavailable.
If you're considering leaving Medicare Advantage, act during the OEP or your initial Medigap open enrollment window. After both windows close, Medigap insurers can deny coverage or charge higher premiums based on your health.
How Do You Switch Health Insurance Plans?
The process is the same regardless of plan type. Verify you're in an eligible enrollment window, compare plans on total cost rather than monthly premium and make sure your new coverage starts before the current one ends.
- 1Confirm Your Enrollment Window
Verify you're in Open Enrollment, have a qualifying life event or are in an eligible Medicare enrollment period before starting an application.
- 2Compare Available Plans
Review the monthly premium, deductible and out-of-pocket maximum. Also check provider networks and the drug formulary for your prescriptions. Compare total annual cost, not just the monthly premium.
- 3Enroll in Your New Plan
Complete your application through HealthCare.gov, your employer's HR portal or Medicare.gov, depending on your plan type.
- 4Confirm Your Coverage Start Date
Verify your new plan's effective date falls before your current coverage ends.
- 5Cancel Your Old Plan
If the new plan doesn't automatically replace the old one, cancel in writing, save your confirmation and follow the steps for canceling health insurance to avoid unexpected billing.
- 6Update Your Providers
Give your doctors, pharmacy and any specialists your new plan name and member ID before your next visit.
What Should You Check Before You Switch Health Insurance?
Plan switches affect more than the monthly premium. The deductible resets to zero, and your doctors may not be in the new plan's network. Prescriptions can move to a higher formulary tier. That shift raises your cost per fill. One day without coverage and you pay full cost for any care you receive.
In-Network Providers
Check whether your primary care doctor and specialists are in the new plan's network. Confirm your preferred hospital is covered too. Out-of-network care costs more and may not be covered at all. HMO and EPO plans restrict coverage to in-network providers only.
Not all five areas carry equal weight. In our review of plan-switching decisions, deductible reset and formulary changes cause the most financial damage because readers don't find out until after the switch takes effect. Check those two before anything else.
Drug Formulary
Confirm your prescriptions appear on the new plan's formulary and check which tier they're on. A drug covered at Tier 1 on your current plan may move to Tier 3 on a new one. That shift raises your cost per fill.
Deductible Reset
Any new plan resets your health insurance deductible to zero. If you've already paid toward your deductible mid-year, that progress doesn't carry over to the new plan. Include the full new deductible in your annual cost estimate before switching.
Premium vs. Total Out-of-Pocket Cost
A lower monthly premium often comes with a higher deductible and out-of-pocket maximum. Compare the average cost of health insurance for your plan tier to check whether your new premium is in a competitive range before you commit.
Coverage Start Date Gap
Confirm the exact date your new plan takes effect. One day without active coverage means you pay the full cost of any care received during that gap. This applies when you switch to a different plan, not when you auto-renew into your existing one.
What to Know Before You Switch Health Insurance Plans
For most Marketplace and employer plan holders, the annual Open Enrollment Period is the right time to switch. No qualifying reason is required and there's no coverage gap if you time the effective date correctly.
If you're outside that window, confirm you have a qualifying event before starting any application. Starting an application without a valid SEP trigger wastes time and won't produce coverage.
Before changing plans, check your deductible progress and confirm your doctors are in-network before comparing total costs rather than monthly premiums alone. Use HealthCare.gov's plan comparison tool to compare premiums and deductibles side by side.
Switching Health Insurance: FAQ
These answers cover the questions MoneyGeek hears most often about switching plans.
Can I switch health insurance if I'm unhappy with my plan?
You can only change a Marketplace or employer plan outside Open Enrollment if you have a qualifying life event. Being unhappy with your current plan doesn't trigger a Special Enrollment Period. Your next opportunity is the ACA Marketplace Open Enrollment Period, Nov. 1 through Jan. 15.
Does switching health insurance reset my deductible?
Yes, switching to a new health insurance plan resets your deductible to zero. If you've already paid toward your deductible mid-year, that progress doesn't transfer to the new plan. Include the full new deductible in your annual cost estimate before changing plans, especially if you're mid-treatment.
Can I have two health insurance plans at the same time?
Having two health insurance plans at the same time is legal. One plan acts as primary and pays first. The second covers some of the remaining balance, but the two plans combined won't pay more than your actual cost of care.
How long does it take for new health insurance to start?
ACA Marketplace coverage you enroll in by Dec. 15 starts Jan. 1. Enrollment between Dec. 16 and Jan. 15 means coverage starts Feb. 1. Coverage through a Special Enrollment Period usually starts the first of the month after you enroll, per HealthCare.gov.
Can I switch from my spouse's plan to my own?
Removal from a spouse's health plan counts as a qualifying life event, which opens a 60-day Special Enrollment Period. Use that window to enroll in a Marketplace plan or an employer-sponsored plan. Marriage also qualifies. Both spouses get 60 days to add or change coverage.
Can I switch Medicaid plans at any time?
Medicaid enrollment is open year-round. You can apply or change coverage at any time through your state Medicaid agency or Benefits.gov. Medicaid eligibility depends on income and household size, not an enrollment window. Some states limit how often you can switch between managed care organizations within a year, so check with your state agency directly.
What happens to my HSA if I switch health insurance plans?
Your HSA balance stays with you when you switch plans. It belongs to you, not your insurer, so you can keep using the funds for qualified medical expenses regardless of your new plan.
You can only contribute to an HSA if your new plan is an HSA-eligible high-deductible health plan (HDHP). Switch to a non-HDHP plan and your existing balance remains available, but you can't make new contributions until you're enrolled in an HDHP again.
About Mark Fitzpatrick
Mark Fitzpatrick, a Licensed Property and Casualty (P&C) Insurance Producer in Connecticut, is MoneyGeek's resident insurance expert. He has spent nearly a decade analyzing the market, first at LendingTree and now at MoneyGeek, where he produces original research on hundreds of carriers and millions of rates across auto, home, renters, health and life insurance.
He covers economics and insurance at MoneyGeek, and his work has been featured in The Washington Post, The New York Times and NPR, among other outlets.
Like all MoneyGeek analysts, he draws on independent cost and consumer experience data. No insurance company partnership influences his recommendations.
Fitzpatrick earned his degrees from Johns Hopkins University (M.A. Economics and International Relations) and Boston College (B.A.). His career began in financial risk management at State Street. He's also a five-time “Jeopardy!” champion.
Sources
- HealthCare.gov. "How to apply & enroll." Accessed June 23, 2026.
- HealthCare.gov. "Want to change your current health plan?." Accessed June 23, 2026.