Idaho Medicare Part C Plans for 2027: What Treasure Valley Residents Should Know

Mitch Lyman

Oct 16

4 min read

If you've been looking into Idaho Medicare Part C plans, you've probably noticed that insurance companies almost never call them that. They call them Medicare Advantage plans. They're the same thing: Part C is the official name, and Medicare Advantage is the name on the mailers and TV ads.

Medicare Open Enrollment runs October 15 through December 7, and it's when you can join, switch or drop a Part C plan for coverage that starts January 1, 2027. As an independent Medicare broker in Meridian, I help people in Boise, Nampa and across the Treasure Valley sort through these plans every fall. Here's what I explain on almost every call.

What is Medicare Part C?

Part C plans are offered by private insurance companies that are approved by Medicare. Instead of Original Medicare paying your claims, your plan does. A Part C plan:

Covers everything Original Medicare covers that's medically necessary
Usually includes prescription drug coverage, so you don't need a separate drug plan
May offer extra benefits Original Medicare doesn't cover, such as dental, vision or hearing. These vary by plan.
Has a yearly limit on what you pay out of pocket for covered services. Once you reach it, you pay nothing more for covered services that year.

You still pay your Part B premium, and you may also pay a plan premium. My Medicare plan types page shows how Part C fits with the other parts of Medicare.

HMO vs. PPO: the biggest choice in Idaho Part C plans

Most Medicare Advantage plans in Ada and Canyon counties are either HMOs or PPOs, and the difference comes down to doctor choice:

HMO: You generally need to use doctors and hospitals in the plan's network, except for emergencies and out-of-area urgent care. You'll usually need a referral to see a specialist.
PPO: You can see providers outside the network, but you'll usually pay more when you do.

Here in the Treasure Valley, the hospital system you use often decides which plans make sense. That's why I always start with your doctors before we look at anything else.

Which companies offer Part C plans in the Treasure Valley?

Several insurance companies offer Medicare Advantage plans locally, and the lineup changes from year to year. For 2027, I work with Blue Cross of Idaho, Humana, UnitedHealthcare and St. Luke's Health Plan, plus Molina for people who qualify for a Dual Special Needs Plan (D-SNP).

One big change this year: Saint Alphonsus Medicare Advantage plans are ending after 2026. If you're on one of them, you'll need a new plan for January. If your plan sent you a non-renewal letter, my post on what to do when your Medicare Advantage plan is ending walks through your options.

What to compare before you choose a 2027 plan

The plan with the lowest premium isn't always the lowest-cost plan for you. When I compare Idaho Part C plans with a client, we look at:

Your doctors and preferred hospital, and whether they're in network for 2027
Your prescriptions and how each plan covers them
The yearly out-of-pocket limit, in case you have a big health year
Copays for the care you actually use, like specialist visits, imaging or physical therapy
Extra benefits you'd really use, not just the ones that sound nice

If you're already on a plan, your Annual Notice of Change letter shows what's changing for 2027 and is a great place to start.

Key dates for 2027 Medicare Advantage plans

October 15 – December 7: Open Enrollment. Join, switch or drop a Part C plan, with coverage starting January 1.
January 1 – March 31: Medicare Advantage Open Enrollment. If you're already in a Medicare Advantage plan, you can make one change, either to another Medicare Advantage plan or back to Original Medicare.

Idaho Medicare Part C FAQs

Is Medicare Part C the same as Medicare Advantage?

Yes. Medicare Part C and Medicare Advantage are two names for the same type of plan, offered by private insurance companies approved by Medicare.

Do I still pay my Part B premium with a Part C plan?

Yes. You keep paying your Part B premium, and some plans also have their own monthly premium. Some plans may help pay part of your Part B premium.

Can I switch Idaho Part C plans after December 7?

If you're already in a Medicare Advantage plan, you can make one change between January 1 and March 31. Outside those windows, you generally need a special situation, like moving or your plan ending, to switch.

Let me compare Idaho Part C plans for you

Sorting through networks, drug coverage and out-of-pocket costs on your own can take hours, and it's easy to miss something. As an independent Medicare broker, I compare the 2027 plans I represent side by side for you, and most of my clients handle everything with me by phone.

Learn more on my Open Enrollment page.

Ready to compare? Call or text me at (208) 963-0333, or send me a message.

We do not offer every plan available in your area. Currently we represent 8 organizations which offer 23 products in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options.