Medicare Open Enrollment 2027: What Idaho Seniors Need to Know Before October 15

​If you have Medicare in Idaho, now is the time to start preparing for 2027. Medicare’s Annual Election Period, often called Medicare Open Enrollment, runs from October 15 through December 7, 2026. Any changes you make during this period generally take effect on January 1, 2027.

I know Medicare decisions can feel confusing. Plan names, premiums, provider networks, drug lists, and extra benefits can change from one year to the next. Our goal at Anthony Insurance Group is to make the process easier by helping you understand your options in plain English.

Here are the key things Idaho seniors should know before October 15.

Mark these important Medicare dates

The Medicare enrollment calendar is straightforward:

• September 30, 2026: Your plan’s Annual Notice of Change should arrive by this date.
• October 1, 2026: Final 2027 plan-specific information should become available for review and comparison.
• October 15–December 7, 2026: Annual Election Period for 2027 coverage.
• January 1, 2027: New coverage begins for changes made during the Annual Election Period.

Open Enrollment happens from October 15 through December 7, 2026, and changes made during this period are generally effective January 1 of the following year. The plan must receive your enrollment request by December 7.

Your current plan will usually renew automatically if you do nothing. However, automatic renewal doesn’t mean the plan will stay exactly the same. It simply means you’ll generally continue into the next plan year under the new terms.

Read your Annual Notice of Change

Your Annual Notice of Change, or ANOC, is one of the most important Medicare letters you’ll receive. Medicare Advantage and Part D plans send it each year to explain changes that begin January 1.

Your 2027 ANOC should arrive by September 30, 2026. Set it aside and read it before making any decisions.

The letter may explain changes to:

• Monthly premiums
• Annual deductibles
• Copayments and coinsurance
• Prescription drug costs and drug tiers
• Covered services
• Provider and pharmacy networks
• Dental, vision, hearing, transportation, or other extra benefits
• Rules for referrals and prior authorization

A plan that worked well for you this year may not be the best fit next year. As a practical first step, compare your ANOC with your current expenses. Think about what you paid for doctor visits, prescriptions, specialists, and other care during 2026.
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If you don’t receive your ANOC by the end of September, contact your plan and ask when your updated materials will be available.

What’s changing with Medicare Part D in 2027?

Prescription drug coverage is an especially important part of the 2027 review.

Medicare Part D costs and limits are changing for 2027, and final plan-specific details should be reviewed after October 1.

Instead of relying on early figures, wait for your final 2027 plan materials after October 1 so you can review the most current information for your specific plan.

In plain English, Part D costs can include things like your monthly premium, any deductible, and what you pay for covered prescriptions during the year. Your actual costs will depend on:

• The prescriptions you take
• Whether your medications are generic or brand-name
• Which drug tier each medication falls into
• Whether your pharmacy is preferred
• Whether your plan requires mail order
• Whether your prescriptions are covered by your plan’s formulary

Part D premiums may also change

A temporary Part D Premium Stabilization Demonstration helped hold down some standalone Part D premiums during 2025 and 2026. CMS has announced that this demonstration ends after December 31, 2026.

That means some standalone prescription drug plans may have different premiums for 2027. The change won’t be the same for every plan, and it doesn’t automatically mean your premium will increase. Final plan-specific details should be reviewed after October 1.

There is also a separate Medicare premium stabilization provision under the Inflation Reduction Act that affects how certain Medicare premium changes are handled over time. That protection does not guarantee that every plan’s premium will stay the same.

Because premiums and drug costs can change, I recommend reviewing your medications every year rather than assuming your current Part D plan is still the best match.

Why review Medicare Advantage plans every year?

Many Idaho seniors choose Medicare Advantage plans because they combine Medicare Part A and Part B coverage, and most include prescription drug coverage. Some also offer additional benefits.

Medicare Advantage plans can be useful, but the details can change annually. That’s why I encourage clients to review their plans even when they’re happy with their current coverage.

Pay close attention to:

• Whether your primary care doctor is still in the network
• Whether your specialists and preferred hospitals are covered
• Whether your pharmacy is in-network
• Monthly premiums and annual medical costs
• Copays for services you use often
• Prescription coverage and drug tiers
• Referral or prior authorization requirements
• Dental, vision, hearing, and other benefits

Networks can matter just as much as premiums. A plan with a low monthly premium may not be a good fit if your preferred doctor or hospital leaves the network.

You can learn more about Medicare Advantage plans through Anthony Insurance Group. After October 1, our team can help you review the final 2027 plan information available in your area and explain your choices in plain English.

Reviewing options doesn’t mean you have to change plans. It simply helps you confirm that your current coverage still fits your health needs, prescriptions, budget, and preferred providers. If you want a local, trusted broker to walk through it with you, Anthony Insurance Group is here to make the process simple with a personalized plan review.

What can you change during the Annual Election Period?

From October 15 through December 7, you can generally:

• Switch from Original Medicare to a Medicare Advantage plan
• Switch from one Medicare Advantage plan to another
• Return from Medicare Advantage to Original Medicare
• Join, drop, or change a stand-alone Part D prescription drug plan if you have Original Medicare
• Add or drop prescription drug coverage when allowed by your coverage choice

If you switch back to Original Medicare, you may also want to consider a separate Part D plan and Medicare Supplement Insurance. Medigap plans have their own rules and enrollment considerations, so don’t make a change without first understanding how the pieces work together.

Where can Idaho seniors get help?

You don’t have to make this decision alone. If you want help sorting through your 2027 Medicare options after October 1, Anthony Insurance Group is here to help.

• Anthony Insurance Group: Our team can provide a personalized plan review, explain available choices in plain English, and help you compare your current coverage with the options we offer in your area.

If you’d rather talk with a local, trusted broker who can make the process feel simpler, our team is ready to help you review your options after October 1 based on your doctors, prescriptions, budget, and priorities.

Our simple checklist for October

Before October 15, gather:

• Your Annual Notice of Change
• A list of your current prescriptions and dosages
• Your preferred doctors and specialists
• Your preferred pharmacy
• Your current premium and common copays
• Any expected medical procedures or changes in care
• Questions about dental, vision, hearing, or other benefits

Then, after October 1, review your final 2027 plan information carefully. If you’d like help making sense of it all, reach out to Anthony Insurance Group for a personalized review. If you decide to make a change, submit your enrollment request by December 7, 2026 for coverage beginning January 1, 2027.

Clear takeaway

Your Medicare plan may renew automatically, but its premiums, benefits, provider network, and prescription costs can change. Read your ANOC by September 30, review the final 2027 plan information after October 1, and take time to look over your coverage before December 7.

If you’re in Idaho and want a local, trusted broker to help you sort through your options, schedule a free consultation with our team or call us at (208) 477-7057. At Anthony Insurance Group, we’re here to make the process simple, explain your choices in plain English, and provide a personalized review of your 2027 Medicare options, without pressure.

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​Important disclaimer: Anthony Insurance Group may not offer every plan available in your area. Any information we provide is limited to the plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. This article is for educational purposes only and is not a substitute for official Medicare plan documents or personalized legal, tax, or medical advice.