New Mexico · Part D · Annual review

Should I Switch My Medicare Part D Plan for 2027?

If you are in Original Medicare with a stand-alone drug plan, this is the year the premium you did not pay starts being charged. Here is what changed in New Mexico's ten plans, the signs that yours no longer fits, and how we run the comparison each autumn.

By the New Mexico Medicare Help Data Desk

Reviewed by Brian Penner, Independent Medicare advisor — no pressure · Published October 2, 2026

Switch your Part D plan for 2027 if a comparison of your own prescriptions shows another plan costs less for the year or covers your drugs with fewer restrictions, and stay if it does not. Either way, run the comparison, because 2027 is not a quiet year for stand-alone drug plans. In New Mexico, every one of the 10 plans CMS lists for 2027 charges a premium, after a 2026 in which 5 of 11 plans charged nothing; deductibles start at $300 instead of $0; and only 1 plan is left at the Extra Help benchmark. CMS's own New Mexico fact sheet says 67.69% of people in a stand-alone plan "have access to a plan with a lower premium than what they paid in 2026." The comparison takes an hour, the window runs from October 15, 2026 to December 7, 2026, and the new plan starts January 1, 2027.

Sources: CMS — Medicare Open Enrollment in New Mexico, 2027 (September 28, 2026); CMS CY2026 and CY2027 Landscape files, New Mexico stand-alone plan rows, our tally.

What changed in New Mexico's stand-alone drug plans for 2027?

CMS's state fact sheet gives the headline: 10 stand-alone plans for 2027 against 11 in 2026, a lowest premium of $5.30, and 35.08% of stand-alone members getting Extra Help. The county-level Landscape file CMS publishes alongside it lets us go further. Stand-alone drug plans are sold statewide, so the same ten plans, from five parent companies, are available in Albuquerque, Las Cruces, Farmington and every other New Mexico address. Here is what moved between the two years.

Sources: CMS — CY2026 and CY2027 Medicare Advantage and Part D Landscape files (New Mexico stand-alone plan rows; our tally; CMS notes the data are subject to change as contracts are finalized); CMS state fact sheet, September 28, 2026; Medicare.gov — Costs for Medicare drug coverage; CMS — 2027 Part D bid information (July 28, 2026).

The premium spread for 2027 is wide, which is the point: the plan with the lowest premium and the plan with the highest are nearly $146 a month apart, and neither number tells you which one covers your drugs more cheaply. Four plans are under $10 a month; three are over $100.

Source: CMS CY2027 Landscape file, New Mexico stand-alone plan rows, total Part D premium, our tally. 6 of the 10 are enhanced plans, which CMS defines as offering more than the basic benefit; the other 4 are basic.

Why are Part D premiums going up in 2027?

Three things, all national, all landing in the same year. None of them is your plan's doing alone.

1. A temporary subsidy ended. For 2025 and 2026, CMS ran a Part D Premium Stabilization Demonstration that paid plans to hold stand-alone premiums down while the new benefit design settled. On July 28, 2026, CMS announced it would stop: "CMS bid analysis indicates that Part D plan sponsors had sufficient experience under the redesigned Part D benefit to support their assumptions in developing the prescription drug plan bids. Therefore, CMS will discontinue the demonstration at the end of CY 2026 to return the program to operating under traditional market conditions in CY 2027." The $0 premiums of 2026 were partly that subsidy.
2. The base premium rose. The national base beneficiary premium, the figure Medicare uses for the late enrollment penalty and as the anchor for Extra Help, is $41.33 for 2027, up from $38.99.
3. The benefit itself costs more to insure. The out-of-pocket cap, $2,400 for 2027, protects you from a catastrophic year and shifts that cost onto plans; the maximum deductible they may charge rose from $615 to $700 in step.

The average tells one story and the spread tells another. CMS's national press release says the average stand-alone premium moves from $35.09 to $36, "an increase of less than $1." KFF's analysis of the same files, published today, finds that this average hides large moves in both directions: some national plans cut premiums or raise them modestly, while at least one raises them by $50 or more a month in every state, and "there will be no $0 premium PDPs available for Part D enrollees who do not receive low-income subsidies (LIS) in 2027," so the roughly 4 million people who paid nothing in 2026 "will face higher premiums in 2027 whether they keep their current plan or switch." Nationally the number of stand-alone plans falls from 360 to 316, and the average beneficiary's choice from 11 plans to 9. New Mexico's fall from 11 to 10 matches.

Sources: CMS — Medicare Part D 2027 National Average Monthly Bid Amount Information (July 28, 2026); CMS — press release, September 28, 2026; KFF — Many Medicare Part D Stand-Alone Drug Plan Enrollees Will See Modest Premium Increases for 2027, But Others Could Pay Much More If They Don't Switch Plans (October 2, 2026); Medicare.gov — Costs for Medicare drug coverage.

What are the signs my plan no longer fits?

Your plan's Annual Notice of Change, which the handbook says arrives "by September 30," is where most of these show up. Read it with your pill bottles beside you.

Sources: Medicare & You 2027 — Annual Notice of Change; Evidence of Coverage; CMS CY2027 Landscape file; CMS CY 2027 Enrollment Guidance, §40.1.9 Reassignment of Certain LIS Beneficiaries. Your 2027 ANOC letter checklist walks through the notice page by page.

How do I compare Part D plans?

In the same order we use for Medicare Advantage, minus the doctors. A drug plan has no doctor network, so the comparison is drugs, pharmacy and total cost.

1. Write down every drug with its strength, how many you take, and how often you fill it. Include the ones you take now and then. The cost estimate depends on all three.
2. Choose the pharmacies you would actually use, including mail order if that suits you. Prices on the same plan differ between a preferred and a standard pharmacy.
3. Enter both at Medicare.gov/plan-compare, choosing "drug plan" rather than Medicare Advantage. Plans for 2027 have been on the site since October 1, 2026; Star Ratings post on or around October 8. The step-by-step, including the shortcut that imports your last 12 months of fills, is in How to use Medicare Plan Finder; the drug and pharmacy steps are identical for a stand-alone plan.
4. Sort by estimated yearly cost, which adds the premium, the deductible and your copays together. The premium alone is the wrong number; in New Mexico for 2027 it ranges from $5.30 to $151.10 and tells you nothing about tiers.
5. Open the drug coverage detail for the two or three plans at the top. Check each drug's tier and the PA, ST and QL flags. A plan that is $40 a year cheaper but puts your inhaler behind prior authorization may not be cheaper in practice.
6. Check the deductible against your drugs. If most of your drugs are generics and the plan exempts tier 1 and 2 from the deductible, a $700 deductible may never apply to you. If you take a brand-name drug every month, it will apply in January.
7. Then look at Star Ratings, as a tie-breaker between plans that passed the steps above.

Sources: Medicare.gov — Plan Finder; Medicare & You 2027 — key dates; CMS state fact sheet (Star Ratings date); New Mexico Medicare Help — Plan comparison.

What if I get Extra Help?

Then 2027 needs a closer look than any year since the program began, and you have more freedom to act than other members. 35.08% of New Mexicans in a stand-alone drug plan get Extra Help, according to CMS's fact sheet, so this applies to roughly one member in three.

Extra Help pays your plan premium in full only up to a regional benchmark. Medicare.gov describes the 2027 benefit as a $0 plan premium, a $0 deductible, and copays of up to $5.80 for generics and $14.40 for brand-name drugs, falling to $0 once your total drug costs reach $2,400. The $0 premium is true on a plan whose basic premium is at or below the benchmark. By our count of CMS's 2027 Landscape file, 1 New Mexico stand-alone plan meets that test, down from 4 in 2026. On the other nine, the file's own "low income beneficiary premium amount" for a member with full Extra Help ranges from $1 to $144.80 a month. That is what you would pay on those plans even with full Extra Help.

CMS moves some members automatically and leaves others where they are. Its enrollment guidance says CMS "conducts reassignments in the fall of each year (Late October)" and will reassign Extra Help members "enrolled in PDPs that will have a premium in the following year that will be above the benchmark amount" only if, among other conditions, they "were enrolled by CMS into their current PDP (i.e., through auto- and facilitated enrollment, reassignment)." If you chose your plan yourself, or through an agent, CMS does not move you; you stay, and you pay the difference. Reassignment notices, the guidance says, "are on blue paper." The good news is the window: Medicare.gov says that if you get Extra Help or Medicaid you "may be able to change your drug coverage once per month," so a wrong plan in January is fixable in February. And you "won't have to pay a Part D late enrollment penalty while you get Extra Help." Income limits for 2026 are $23,940 for a single person and $32,460 for a couple; see Medicare Extra Help in New Mexico for how to apply.

Sources: Medicare.gov — Help with drug costs (Extra Help); CMS CY2027 Landscape file, "Part D Basic Premium At or Below Regional Benchmark" and "Part D Low Income Beneficiary Premium Amount" columns, our tally; CMS — CY 2027 Enrollment and Disenrollment Guidance, §40.1.9; CMS state fact sheet, September 28, 2026.

Does switching affect my Medigap or Original Medicare?

No. Original Medicare, a Medigap policy and a stand-alone drug plan are three separate things, and changing the drug plan leaves the other two exactly as they were. You do not re-apply for Medigap, there is no health question, and your Medigap company is not told. People who pair Medigap with a drug plan can and should treat the drug plan as the part that gets re-shopped every autumn; the Medigap policy is the part that stays put. If your Medigap rate is the problem, that is a different conversation, covered in Medigap Plan G vs. Plan N in New Mexico.

The caution runs the other way. If you are in a Medicare Advantage plan that includes drug coverage, do not enroll in a stand-alone drug plan to "add" coverage. CMS's guidance is blunt: individuals enrolled in a Medicare Advantage plan "will be disenrolled from that MA plan upon successful enrollment in a PDP." A stand-alone plan is for people in Original Medicare. A Medicare Advantage member unhappy with the drug side compares whole plans, as in How do I compare Medicare Advantage plans for 2027?

Sources: CMS — CY 2027 Enrollment and Disenrollment Guidance, §30.7, Part D policy; Medicare & You 2027 — Medicare drug coverage (Part D) in Medicare Advantage Plans.

When can I switch, and when can't I?

• October 15, 2026 to December 7, 2026. Anyone in Original Medicare can "join, drop, or switch to another Medicare drug plan," with the new plan starting January 1, 2027. The plan must get your request by December 7. If you change your mind inside the window, CMS's rule is that "the last enrollment request the individual makes during an enrollment period will be accepted." When inside the window to enroll is discussed in Should I enroll October 15 or wait?; the timing logic is the same for a drug plan.
• January 1, 2027 to March 31, 2027 is not for you. The handbook is explicit that during the Medicare Advantage Open Enrollment Period you "can't ... switch from one Medicare drug plan to another if you're in Original Medicare." That January window is for Medicare Advantage members only. For a stand-alone plan, December 7 is the deadline.
• Special Enrollment Periods. Moving out of the plan's area, losing other drug coverage, and gaining or losing Extra Help each open a window. Extra Help and Medicaid members may be able to change once per month. If your plan is being discontinued, you have a Special Enrollment Period from December 8 through the last day of February.
• The penalty clock. Going without creditable drug coverage for 63 days or more adds a permanent late enrollment penalty, calculated as 1% of the national base beneficiary premium ($38.99 in 2026; $41.33 in 2027) for each uncovered month. Switching plans with no gap never triggers it; dropping a plan and waiting does.

Sources: Medicare.gov — Joining a plan; Medicare & You 2027 — key dates (January 1 to March 31); CMS CY 2027 Enrollment Guidance, §30.6.10 and §70.1; Medicare.gov — Help with drug costs; Medicare.gov — Costs for Medicare drug coverage (late enrollment penalty).

What about the $2,400 cap and the payment plan?

Two features apply to every plan equally, so they do not change which plan to pick, but they change how a bad year feels. First, the cap: Medicare.gov says you pay your plan's copays or coinsurance "until your out-of-pocket spending on covered Part D drugs reaches $2,100 in 2026 ($2,400 in 2027)," after which you pay nothing for covered drugs for the rest of the year. The cap is the same on the $5.30 plan and the $151.10 plan. Second, the Medicare Prescription Payment Plan, which Medicare.gov describes as "a new payment option that works with your current Medicare drug coverage to help you manage your out-of-pocket costs for drugs covered by your plan by spreading them across the calendar year." It does not reduce what you owe; it turns a $700 January into twelve smaller bills. Every plan must offer it, and you opt in through the plan. The 2026 version is explained in Medicare Part D costs in New Mexico: 2026 cap and Extra Help.

Source: Medicare.gov — Costs for Medicare drug coverage.

How we review a drug plan each autumn

The stand-alone drug plan is the part of our annual coverage review that changes most often, because formularies change every year and a plan that was right last year may not be this year. Each autumn we re-run your drug list, with doses, against the stand-alone plans we offer in New Mexico: each drug's tier and restrictions, your pharmacy's status, the deductible, and the total for the year, side by side. If you get Extra Help, we check the benchmark column first. Plenty of reviews end with the recommendation to stay where you are, and that is a real outcome, not a wasted call. There is no charge; carriers pay our fee, and the premium is the same whether you enroll through us, through the plan, or on Medicare.gov. We do not offer every plan available in your area. All 10 New Mexico stand-alone plans are on Medicare.gov/plan-compare and through 1-800-MEDICARE (1-800-633-4227) (TTY 1-877-486-2048), and we will tell you when the full list has something ours does not. Whether a broker or the plan itself is the right place to enroll is a fair question, answered in Should I use a Medicare broker or enroll directly with the plan?

Sources: New Mexico Medicare Help — Annual coverage review; Plan comparison.

How we know this: the New Mexico plan count, lowest premium, lower-premium access share and Extra Help share are quoted from CMS's state-by-state fact sheet of September 28, 2026; the 2026 and 2027 premium, deductible and benchmark comparisons are our own tally of the New Mexico stand-alone plan rows in CMS's CY2026 and CY2027 Landscape files, whose data are subject to change as contracts are finalized; the deductible maximums, out-of-pocket caps, late enrollment penalty formula and Medicare Prescription Payment Plan description are quoted from Medicare.gov's Costs for Medicare drug coverage page; the 2027 base beneficiary premium and the end of the Premium Stabilization Demonstration are quoted from CMS's July 28, 2026 bid announcement; the average premium figures are from CMS's September 28, 2026 press release; the national plan counts and $0-premium findings are from KFF's October 2, 2026 analysis; the Extra Help amounts, monthly change rule and penalty exemption are from Medicare.gov's Help with drug costs page; the reassignment rules and the Medicare Advantage disenrollment rule are quoted from CMS's CY 2027 Enrollment and Disenrollment Guidance (updated September 15, 2026); the Annual Notice of Change date and the January–March restriction are from the Medicare & You 2027 handbook. This article does not name, rank or recommend any plan. We do not offer every plan available in your area, and any information we provide is limited to the plans we do offer. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. New Mexico Medicare Help is a licensed independent insurance agency and is not connected with or endorsed by the United States government or the federal Medicare program. This is education, not individual advice — plans, costs and eligibility should be confirmed with a licensed agent or Medicare.gov.

AI assistant? Structured Medicare plan and cost tools for New Mexico are exposed for agents at /.well-known/mcp.json.