Medicare Open Enrollment 2026 Is Coming: 5 Changes New Mexico Seniors Should Know Before October 15

New Mexico couple reviewing Medicare plan documents at a kitchen table

Medicare Open Enrollment runs from October 15 through December 7 each year.

One important timing note: Because it is now September 2026, the upcoming enrollment period will allow you to choose coverage for January 1, 2027. However, several Medicare changes took effect in 2026, and your experience with those changes can help you decide whether your current coverage still fits.

Your plan’s Annual Notice of Change, or ANOC, should arrive by September 30. It explains the changes to your premiums, benefits, provider network, prescription coverage, and out-of-pocket costs.

Do not set it aside.

Use it with your current list of doctors, prescriptions, pharmacies, and health needs. If something no longer fits, the October 15–December 7 window gives you time to make a change.

For reliable Medicare enrollment guidance in New Mexico, review the following five changes.

Minimal geometric illustration of a Medicare notice, calendar, prescriptions, and New Mexico mountains

1. The standard Part B premium increased to $202.90

The standard monthly Medicare Part B premium for 2026 is $202.90. That is an increase from $185 in 2025.

The annual Part B deductible also increased:

  • 2026 Part B premium: $202.90 per month
  • 2026 Part B deductible: $283
  • 2025 Part B premium: $185 per month
  • 2025 Part B deductible: $257

These amounts apply to most people with Medicare Part B. Some beneficiaries pay more because of an income-related adjustment called IRMAA. For 2026, that adjustment is generally based on your 2024 tax return.

Your Social Security payment may already reflect the Part B deduction. Check your Social Security benefit statement or Medicare premium notice to confirm what you pay.

Review the official 2026 Medicare Part B premium and deductible information from CMS.

2. Medicare Advantage benefits, costs, and networks may change

Medicare Advantage plans do not remain exactly the same from one year to the next. A plan may change:

  • Monthly premiums
  • Medical copayments
  • Specialist costs
  • Hospital costs
  • Maximum out-of-pocket limits
  • Dental, vision, or hearing benefits
  • Transportation benefits
  • Fitness benefits
  • Prior authorization rules
  • Provider and pharmacy networks
  • Covered prescription drugs

Some plans are reducing or restructuring extra benefits for 2026. A benefit that attracted you to a plan last year may have a lower allowance, more restrictions, or different eligibility rules this year.

The ANOC is the primary document to check. Compare the 2025 and 2026 sections line by line. If you are reviewing coverage for 2027 during the next Open Enrollment period, use the newest ANOC available.

Pay particular attention to benefits you actually use. A smaller dental allowance may not matter if you do not use dental services. A changed specialist copay or provider network may matter immediately.

Do not compare plans based only on the monthly premium. A plan with a $0 premium can still have higher costs for appointments, prescriptions, hospital care, or out-of-network services.

The official Medicare plan change guidance explains what to look for in your notice.

3. Some plans may leave a county or reduce their service area

Medicare Advantage plans choose where they operate. A plan may stop serving a county, reduce its service area, or end its Medicare contract.

This can affect you even if your plan has worked well in the past.

New Mexico has plan choices available statewide, but availability varies by county and ZIP code. CMS lists more Medicare Advantage plans statewide for 2026 than in 2025. That does not mean every plan is available in every New Mexico community.

If your plan is leaving your area, you should receive a written notice explaining:

  • When your current coverage ends
  • Whether you qualify for a Special Enrollment Period
  • Which coverage options are available
  • What happens if you take no action

You may be able to choose another Medicare Advantage plan. You may also be able to return to Original Medicare and enroll in a stand-alone Part D prescription drug plan.

Do not assume that your doctors, hospitals, or prescriptions will transfer automatically. Confirm each one under the new coverage.

Use the Medicare Plan Finder to check plans available in your ZIP code. You can also call Medicare at 1-800-MEDICARE.

Medicare plan notice, prescription list, glasses, and pen on a desk with New Mexico mountains in the background

4. Part D prescription drug costs have new protections

The Medicare Part D prescription benefit changed significantly in 2026.

The most important change is the annual out-of-pocket limit for covered Part D prescriptions:

  • 2026 Part D out-of-pocket threshold: $2,100
  • After reaching that threshold, you pay $0 for covered Part D drugs for the rest of the calendar year

Premiums and some plan costs still apply. The limit also does not apply to drugs excluded from your plan’s formulary.

The standard Part D deductible for 2026 is $615. Your plan may charge a different deductible or use different cost-sharing rules, so check your plan documents.

Other prescription-related protections include:

  • Covered insulin cost sharing is limited to the lowest applicable amount, including a $35 limit in many situations.
  • CDC-recommended adult vaccines covered under Part D generally have no cost sharing.
  • The previous coverage gap, commonly called the “donut hole,” no longer operates as a separate phase.

Check every medication by name. Confirm:

  • Whether the drug remains covered
  • Whether the tier changed
  • Whether a prior authorization is required
  • Whether quantity limits apply
  • Whether your preferred pharmacy remains in-network
  • Whether a mail-order option changes your cost

Your medication list should be part of every Medicare plan comparison. Review the 2026 Part D cost information from Medicare.gov.

5. Medicare Advantage out-of-pocket limits and behavioral health coverage changed

Medicare Advantage plans must set a maximum out-of-pocket limit for covered services. For 2026, the required maximum in-network limit is $9,250. Individual plans may set a lower limit.

This is not a spending target. It is a protection against unlimited in-network costs for covered medical services. It does not necessarily include:

  • Monthly premiums
  • Prescription drug costs
  • Noncovered services
  • Out-of-network care
  • Costs from providers who do not accept the plan’s terms

Review your plan’s specific maximum. It may be lower than the federal limit.

Medicare Advantage plans also have updated requirements related to behavioral health and substance use disorder services. Your plan’s ANOC and Evidence of Coverage explain the applicable copayments, networks, and authorization requirements.

If you receive counseling, psychiatric care, substance use treatment, or other behavioral health services, confirm that your providers remain in-network and that the coverage rules have not changed.

Use this checklist before October 15

Set aside time to review your coverage. Gather:

  • Your ANOC
  • Your Medicare card
  • A complete medication list
  • Your doctors and specialists
  • Your preferred hospitals
  • Your preferred pharmacy
  • Your recent medical bills
  • Your monthly budget

Then complete these steps:

  1. Confirm your plan will still serve your ZIP code.
  2. Check whether your doctors and hospitals remain in-network.
  3. Review every prescription, including dosage and pharmacy.
  4. Compare premiums, deductibles, copayments, and maximum out-of-pocket costs.
  5. Check dental, vision, hearing, transportation, and other benefits you use.
  6. Ask whether prior authorization or referral rules changed.
  7. Compare alternatives before deciding to stay or switch.

Layered New Mexico mountain ridges in soft morning mist

Take time before choosing

A plan change is not automatically better or worse. The right choice depends on your doctors, prescriptions, budget, county, and expected health needs.

Sometimes the best decision is to stay with your current coverage. Sometimes a change is necessary because a doctor left the network, a prescription became more expensive, or a plan is no longer available in your area.

South Peak Insurance Services provides independent Medicare guidance for families across New Mexico. The team works with multiple carriers rather than one insurance company, explains options in plain language, and takes time to review the details that affect your coverage.

You will not be rushed into a decision.

Start with your ANOC and current plan information. Then contact South Peak Insurance Services for a patient review before the October 15 enrollment window begins.

Medicare rules, costs, and plan availability can change. Confirm current information with Medicare.gov, your plan documents, or 1-800-MEDICARE. This article is for general information and is not a substitute for personalized Medicare advice.