Every fall, mailboxes across Sun City fill up with Medicare plan flyers, and the TV ads start promising "extra benefits" and "$0 premiums." It's easy to feel pressured. As a geriatrician who has cared for Medicare patients in the West Valley for more than 15 years, I see the same problem every January: a patient switches plans for a better dental benefit and then discovers their doctor, specialist, or medication isn't covered anymore.
This guide will help you use Open Enrollment wisely — and keep the care relationships that matter most.
When is Medicare Open Enrollment?
The Medicare Annual Open Enrollment Period runs October 15 through December 7 every year. Any changes you make take effect January 1.
During this window you can:
- Switch from Original Medicare to a Medicare Advantage plan (or the reverse)
- Switch from one Medicare Advantage plan to another
- Join, drop, or change a Part D prescription drug plan
If you're happy with your current coverage and nothing important has changed, you don't have to do anything — your plan will generally renew automatically. But "doing nothing" should be a decision, not an accident.
There is also a separate Medicare Advantage Open Enrollment Period from January 1 through March 31, when people already in a Medicare Advantage plan can make one change. It's a useful safety net, but it's far less stressful to get it right the first time.
Step 1: Read your Annual Notice of Change
If you have a Medicare Advantage or Part D plan, your insurer should have mailed you an Annual Notice of Change (ANOC) by the end of September. This document lists what's changing next year — premiums, copays, drug coverage, and sometimes the provider network.
Look especially for:
- Changes to your monthly premium and deductible
- New copays for primary care, specialists, labs, or imaging
- Medications that are moving to a different tier or being dropped
- Changes to prior-authorization or referral rules
Step 2: Confirm your doctors are in network
This is the single most important step, and the one most people skip.
- Original Medicare lets you see any doctor in the country who accepts Medicare. No networks, no referrals.
- Medicare Advantage plans usually use a network. HMO plans typically require you to see in-network doctors (except emergencies). PPO plans let you go out of network, but often at a higher cost.
Before you enroll in any new plan, call each of your doctors' offices — your primary care physician, your specialists, and your preferred hospital — and ask: "Are you in network with [exact plan name] for 2027?" Plan names can be very similar, so give the full name and plan ID if you can.
At Pinnacle Health, we accept Medicare and work with several commercial and Medicare-related plans. Because plan contracts change every year, please call us at (623) 295-2952 to verify your specific plan before you switch. We're happy to check for you.
Step 3: Check your prescriptions — every one of them
Drug coverage is where many seniors get surprised. Use the Medicare Plan Finder at Medicare.gov and enter every medication you take, with the correct dose. The tool will show your estimated yearly cost under each plan, not just the premium.
Bring your list to your next visit, too. During a medication review we can often identify a lower-cost alternative, a medication you no longer need, or a combination that should be simplified — which can make plan comparisons much easier.
Step 4: Look past the "extras"
Gym memberships, grocery cards, and dental allowances can be genuinely helpful. But they shouldn't be the deciding factor if a plan:
- Doesn't include your doctors
- Requires referrals or prior authorization for care you use often
- Has a higher out-of-pocket maximum than you could afford in a bad year
Think about your worst realistic health year — a hospital stay, a new diagnosis, physical therapy after a fall — and ask how each plan would handle it.
Step 5: Get free, unbiased help
You don't have to figure this out alone, and you shouldn't have to rely only on a salesperson. Free options include:
- Medicare.gov and 1-800-MEDICARE
- Arizona's State Health Insurance Assistance Program (SHIP), which offers free, unbiased Medicare counseling through local Area Agencies on Aging
- A trusted family member who can sit with you while you compare plans
Questions to ask yourself before switching
- Are all of my current doctors in network next year?
- Are all of my medications covered, and what will they cost in total?
- What's the plan's out-of-pocket maximum?
- Do I spend part of the year out of state? (If so, check out-of-area coverage carefully.)
- Will I need referrals to see specialists?
Use your Medicare benefits before the year ends
Open Enrollment is also a good reminder to use the benefits you already have. If you haven't had your Medicare Annual Wellness Visit this year, there's still time. It's a preventive visit focused on your personalized prevention plan, medication review, and screening schedule — and it's a great opportunity to talk through your coverage questions with your doctor.
Schedule a visit with Dr. Khurana
Pinnacle Health is a primary and geriatric care practice on W. Thunderbird Blvd in Sun City, welcoming new patients from Sun City, Sun City West, Peoria, Surprise, and Glendale. We often have same-day or next-day appointments.
Call (623) 295-2952 to verify your coverage or schedule your visit.
This article is for general educational purposes and is not insurance or legal advice. Plan details change every year — always confirm coverage directly with your plan and providers.