Albuquerque · Prescriptions after a Medicare plan change
New Medicare Plan Won't Cover My Prescription: What to Do
The pharmacy says "not covered" on January 3. Here is the federal rule that still gets you a month of medication, the three moves to make in the 90 days after, and what to do in December so it never happens.
The bottom line
- You will not walk away empty-handed. Federal rules require every Medicare drug plan to give a new member a one-time 30-day transition fill of a drug they were already taking, at any point in the first 90 days, even if the drug is not on the formulary or needs prior authorization.
- The transition fill is a bridge, not a fix. Use it to do one of three things: get a formulary exception, switch to a drug the plan covers, or appeal.
- An exception has a clock. The plan must answer a standard request within 72 hours and an expedited one within 24 hours once it has your prescriber's statement.
- December is the quiet month. Ask about 90-day refills, move prescriptions to a pharmacy in the new plan's network, and re-enroll in the Medicare Prescription Payment Plan if you used it, because it does not carry over.
- Choose during October 15, 2026–December 7, 2026 so the new plan starts January 1. A plan picked during the later Special Enrollment Period starts a month later, and no transition fill covers a month with no plan at all.
If your new Medicare plan won't cover a prescription in January, you are entitled to a one-time 30-day transition fill of any drug you were already taking, at any point during your first 90 days in the plan, whether the drug is missing from the formulary or covered only with prior authorization or step therapy. That rule comes from federal regulation and applies to every stand-alone Part D plan and every Medicare Advantage plan with drug coverage. The month it buys you is for three moves: ask your prescriber to file a formulary exception (decided within 72 hours, or 24 hours expedited), switch to a drug the plan does cover, or appeal a denial. For the roughly 30,000 New Mexicans whose Presbyterian Medicare Advantage plan is being discontinued after December 31, 2026, most of whom live in the Albuquerque area, this is the January question, and the calmest way through it starts in December.
The rule: Medicare.gov — drug plan rules; 42 CFR §423.120(b)(3). Timeframes: CMS — coverage determinations. The Presbyterian change: The Santa Fe New Mexican (June 2026). Checking your list before you enroll is a different job; that one is in Keep your medications when your plan changes.
Will my new Medicare plan cover my prescriptions in January?
Only if each drug passes three checks on January 1, and it is worth naming them separately because the fix is different for each one. Every Medicare drug plan has a formulary, its own list of covered drugs, and every plan attaches rules to some of the drugs on that list. Medicare.gov describes the three common ones: prior authorization, where the plan must approve the drug before it pays; step therapy, where you first try a less expensive drug on the list before the plan covers the one you were prescribed; and quantity limits, where the plan caps how much it covers in a period, for example 30 tablets a month.
A prescription that worked fine on your Presbyterian plan in December can therefore fail in January in three ways:
- The drug is not on the new plan's formulary at all. The pharmacy claim is rejected as non-formulary. This is exactly what the transition fill exists for.
- The drug is on the formulary but needs prior authorization, step therapy or a quantity-limit override. The claim is rejected pending approval. The transition fill covers this case too; the regulation is explicit that drugs "on a plan's formulary but require prior authorization or step therapy" are included.
- Your pharmacy is not in the new plan's network. This one is not a formulary problem and no transition fill solves it. Medicare.gov is plain about it: "If you buy your drugs at an out-of-network pharmacy, you'll probably have to pay full cost for the drugs." Plans with "preferred in-network pharmacies" may also charge less at those locations than at other pharmacies in the network.
The third case catches Presbyterian members more often than most, because many fill at a Presbyterian pharmacy inside a Presbyterian clinic. Whether that pharmacy is in your 2027 plan's network is a fact you look up in the new plan's pharmacy directory, not something to assume either way.
What is a transition fill, and how do I get one?
A transition fill is the one piece of the Medicare drug benefit written specifically for the first weeks after you change plans. Medicare.gov defines it as "a one-time, 30-day supply of a drug you've been taking that your plan either doesn't cover or requires prior authorization/step therapy." The federal regulation behind it, 42 CFR §423.120(b)(3), requires every Part D sponsor to "ensure access to a temporary supply of drugs within the first 90 days of coverage under a new plan," and says that window "applies to retail, home infusion, long-term care and mail-order pharmacies." The table sets out the rule as it applies to a member switching plans for January 1, 2027.
| Question | What the rule says | Where it comes from |
|---|---|---|
| Who gets it? | New enrollees after the Annual Enrollment Period, people newly eligible for Medicare, anyone who switches plans mid-year, and current members whose plan dropped or restricted their drug for the new year | 42 CFR §423.120(b)(3) |
| Which drugs? | A Part D drug you were already taking that is not on the formulary, or is on it but requires prior authorization or step therapy. Not a drug prescribed for the first time after you join, and not a drug Part D excludes by law | Medicare.gov; CMS Part D manual, ch. 6 |
| How much? | One time, "at least an approved month's supply," unless the prescription itself is written for less. Medicare.gov describes it as a 30-day supply | 42 CFR §423.120(b)(3) |
| When? | At any time during the first 90 days of coverage under the new plan | 42 CFR §423.120(b)(3) |
| In a nursing home? | Residents of long-term care facilities get at least a 31-day supply, with refills as needed during the transition period, and an emergency supply rule after the period ends | CMS Part D manual, ch. 6 |
| What do I pay? | For a drug that needs prior authorization or step therapy, the same cost sharing that would apply once the rule is met. For a non-formulary drug, the cost sharing the plan uses for approved exceptions | 42 CFR §423.120(b)(3) |
| How will I know? | The plan must mail you a written notice within 3 business days of the transition fill, explaining that it was temporary and how to request an exception | 42 CFR §423.120(b)(3) |
You do not file a form to get a transition fill. When the pharmacy submits the claim, the plan's system is supposed to recognize that you are a new member and pay the temporary supply; if it rejects the claim instead, the pharmacist can call the plan's pharmacy help desk and ask for the "transition override." The words matter. Ask for a transition fill or transition supply by name; a pharmacist who hears "it's not covered" may simply hand the prescription back.
What the transition fill does not do is settle anything. The letter that follows it is the plan telling you the clock is running. Thirty days later the same claim will reject again unless one of the three moves below has been made.
What should I do before December 31?
Most January prescription problems are December problems that nobody looked at. Once you have chosen your 2027 plan, and the 2027 formularies are public on Medicare.gov Plan Compare from early October, five things done in December keep the transition fill in reserve rather than in use.
- Run every drug through the new plan's formulary one more time. Not just "covered" but the tier, and whether it carries a prior-authorization, step-therapy or quantity-limit flag. Write the flags down; they are your January to-do list.
- Ask the pharmacist about a 90-day fill of each maintenance drug. Whether your current plan allows it depends on its rules, the drug and when you last refilled, so ask in early December rather than the last week. A December 90-day fill means a January rejection is a March problem with the exception already approved.
- Check the pharmacy. Look up your pharmacy in the new plan's directory. If it is out of network, or in the network but not preferred, decide now where January prescriptions go and have your prescriber send new prescriptions there. Medicare.gov notes some plans also offer mail order for up to a 3-month supply.
- If you used the Medicare Prescription Payment Plan, sign up again. The option to spread drug costs across monthly bills does not follow you to a new plan. Medicare.gov says that if you switch plans and want to keep participating, "you need to contact your new plan." You can ask the new plan to sign you up before January 1.
- Get the prescriber ready. For any drug with a flag, ask your doctor's office in December whether it will submit the exception or prior-authorization request the first week of January, and what documentation it needs from you. Some plans accept requests as soon as your enrollment is confirmed; others wait for the effective date. Either way, an office that is expecting the request moves faster than one hearing about it from a pharmacist.
What do I do the day the pharmacy says "not covered"?
The sequence below assumes it is early January, you are standing at the counter, and the claim rejected.
- Ask for the transition fill by name. "I'm a new member as of January 1. Please run this as a transition supply." If the pharmacist gets a rejection anyway, ask them to call the plan's pharmacy help line, the number printed on your new ID card, for the override.
- Find out why it rejected. Non-formulary, prior authorization required, step therapy, quantity limit, or pharmacy out of network. The rejection code tells the pharmacist. The move that follows is different for each.
- If it is the pharmacy, not the drug, the transition fill will not help. Have the prescription transferred to an in-network pharmacy that day; pharmacies do this routinely.
- Call your prescriber's office before you leave the parking lot. Tell them which drug rejected and why, and ask them to submit a coverage determination request (the formal name for an exception or prior-authorization request) to the plan. Ask whether they will mark it expedited.
- Watch for the plan's letter. It arrives within 3 business days of the fill and spells out the exception process. Keep it with the ANOC and the non-renewal letter you received in the fall.
- Put a date on the calendar 20 days out. If nothing has been decided by then, call the plan yourself and ask for the status of the request. Ten days of supply is enough time to escalate; two is not.
How do I ask for a formulary exception, and how long does it take?
An exception is a request that the plan cover a drug it does not list, or waive a rule it attached to one it does. CMS's exceptions page describes both kinds: a formulary exception "to obtain a Part D drug that is not included on a plan sponsor's formulary, or to request to have a utilization management requirement waived," and a tiering exception to pay a lower copay. Anyone can start the request, and CMS says "an enrollee, an enrollee's prescriber, or an enrollee's representative may request a standard or expedited coverage determination," but the request goes nowhere without the prescriber's supporting statement. Medicare.gov puts it directly: "your prescriber must provide a statement explaining the medical reason why the exception should be approved." The medical reasons that work are the ones the plan-rules page lists: the covered alternatives would be less effective for you, or would cause harmful side effects.
| Step | Standard track | Expedited (fast) track | Who decides |
|---|---|---|---|
| Coverage determination (exception or prior-authorization request) | Decision within 72 hours of the request | Decision within 24 hours | Your plan |
| Level 1 appeal (redetermination) if denied | Decision within 7 days | Decision within 72 hours | Your plan, on a fresh review |
| Level 2 appeal if denied again | Reviewed by an independent entity under contract with CMS | Same, expedited | Independent Review Entity |
Sources: CMS — coverage determinations ("within 24 hours after receiving an expedited request or 72 hours after receiving a standard request"); Medicare.gov — appeals in a Medicare drug plan (benefits appeal 7 days; expedited 72 hours). Full appeal ladder: How to appeal a Medicare denial in New Mexico.
The expedited track is not automatic. You or the prescriber asks for it, and the plan grants it if the prescriber says, or the plan agrees, that waiting the standard time "may seriously jeopardize your life, health, or ability to regain maximum function." For a seizure medication or insulin that language is easy to justify; for a maintenance drug with a covered alternative it may not be, and the 72-hour track is still faster than most people expect. The practical bottleneck is almost never the plan's clock. It is the days between the pharmacy rejection and the moment the prescriber's statement actually reaches the plan.
Bring your prescription list. We will run each drug, tier, flag and pharmacy against the 2027 plans we offer in Bernalillo County before you enroll — free, no pressure.
Book an appointment →What if the exception is denied?
A denial is a letter, not the end. It must tell you why, and it starts the appeal clocks in the table above: you have 60 days to ask the plan for a redetermination, which is a fresh look by different reviewers. Three things are worth doing in parallel while that runs.
- Ask the prescriber, honestly, about the covered alternative. Step therapy exists because for most people the first-step drug works. If your doctor thinks it is reasonable to try, trying it while the appeal is pending costs nothing and may end the problem. If your doctor thinks it is not, that opinion, in writing, is the appeal.
- Check whether the drug is paid another way. Some drugs given in a clinic are Part B, not Part D, and are outside the formulary fight entirely. Others have manufacturer assistance programs. Neither is a substitute for coverage, but both can bridge a gap.
- Know the ceiling on what a bad outcome costs. Even a drug you end up paying for at an exception tier counts toward the annual Part D out-of-pocket cap: $2,100 for 2026, and $2,400 for 2027, after a 2027 deductible of up to $700 (up from $615). Once you reach the cap, covered Part D drugs cost nothing for the rest of the year. That does not help with a drug the plan refuses to cover at all, which is why the exception matters more than the cap.
2026 figures: CMS — Final CY 2026 Part D redesign program instructions. 2027 figures: CMS — Announcement of CY 2027 Medicare Advantage capitation rates and Part C and Part D payment policies, defined standard benefit table. Our plain-English walk-through of the cap: Part D costs in New Mexico.
Why does this matter so much for Albuquerque members?
Because the people changing plans this year are, on average, taking several drugs at once, and every one of them has to clear the same three checks on the same morning. The CDC's National Center for Health Statistics reports that among U.S. adults 65 and older, the share using five or more prescription drugs in the past 30 days rose from 33.3% in 2001–2004 to 43% in 2017–March 2020, and the share using three or more rose from 59.8% to 67.7%. Locally, the CDC's PLACES 2023 estimates for Bernalillo County put high blood pressure at 34% of adults and diagnosed diabetes at 12%, two conditions that almost always come with a standing prescription and, for diabetes, often several.
Source: CDC/NCHS, Health, United States — prescription drug use, adults 65 and older, past 30 days. Local context: CDC PLACES 2023, Bernalillo County, NM adults.
There is also a scale point. KFF's tabulation of CMS data counts 362,579 New Mexicans with Part D coverage in 2025, 218,259 of them through a Medicare Advantage drug plan and 144,320 through a stand-alone plan. A 30,000-member plan discontinuation moves a meaningful slice of that first group onto new formularies on a single day, and pharmacy help desks, prescriber offices and plan exception queues in the Albuquerque area will all be busiest in the first two weeks of January. That is one more argument for settling as much as possible in December. Local plan options: Medicare plans in Albuquerque.
Source: KFF State Health Facts — Medicare beneficiaries enrolled in Part D coverage (2025).
Which dates matter, December through March?
| When | What happens | What to do |
|---|---|---|
| October 15, 2026–December 7, 2026 | Annual Enrollment Period; a plan chosen here starts January 1, 2027 | Enroll, then run the formulary and pharmacy checks on the plan you chose |
| Early December 2026 | Last realistic month for 90-day refills on the outgoing plan | Ask the pharmacist drug by drug; re-elect the Medicare Prescription Payment Plan with the new plan if you used it |
| December 31, 2026 | Presbyterian's standard Medicare Advantage plans end | Confirm the new plan's ID card has arrived; if not, call the plan for your member number |
| January 1, 2027 | New coverage and the 90-day transition window begin | Fill anything due; ask for the transition supply by name if a claim rejects |
| Within 3 business days of a transition fill | Plan mails the transition notice | Have the prescriber submit the exception or prior-authorization request now, not at day 25 |
| 72 hours / 24 hours after the request | Plan must decide the coverage determination | If denied, request a redetermination within 60 days (7 days standard, 72 hours expedited) |
| About January 31, 2027 | A January 1 transition fill runs out | By now the exception should be decided or the switch to a covered drug made |
| About March 31, 2027 | Day 90; the transition window closes | Any drug still not settled needs an exception on file; no further transition fill is available |
Sources: Medicare.gov — Open Enrollment; 42 CFR §423.120(b)(3); CMS — coverage determinations; Medicare.gov — drug plan appeals. If you are relying on the December 8–February 28 Special Enrollment Period instead of AEP, read the gap warning first: Do I get a Special Enrollment Period?
How we know this: the transition-fill rule comes from Medicare.gov's drug-plan rules page and the federal regulation at 42 CFR §423.120(b)(3), with long-term-care detail from Chapter 6 of the CMS Prescription Drug Benefit Manual; exception and appeal timeframes come from CMS's coverage-determination and exceptions pages and Medicare.gov's drug-plan appeals page; pharmacy-network and Prescription Payment Plan facts come from Medicare.gov; 2026 and 2027 Part D deductible and out-of-pocket figures come from CMS program instructions and the CY 2027 rate announcement; prescription-use statistics come from CDC/NCHS Health, United States; local health measures come from the CDC PLACES 2023 release; New Mexico Part D enrollment comes from KFF's tabulation of CMS data; details of the Presbyterian announcement come from June 2026 reporting by The Santa Fe New Mexican and the Albuquerque Journal. Whether a specific drug is covered, and at what tier, is decided by each plan's 2027 formulary, which we do not predict. 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 Presbyterian, the United States government, or the federal Medicare program. This is education, not advice — confirm plans, costs, and eligibility 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.
Questions Albuquerque members are asking
What is a transition fill for Medicare?
A transition fill is a one-time, 30-day supply of a drug you were already taking that your new plan either does not cover or covers only with prior authorization or step therapy. Every Medicare drug plan, stand-alone or inside Medicare Advantage, must provide it at any point during your first 90 days of coverage. It buys time to ask for an exception or switch to a covered drug; it does not apply to a prescription written for the first time after you join.
Will my new Medicare plan cover my prescriptions in January?
Only if each drug is on the new plan's formulary at a pharmacy in its network. A drug can fail in three ways: it is not on the list at all, it is on the list but needs prior authorization, step therapy or a quantity limit, or your pharmacy is out of the plan's network. The first two are what the transition fill is for. The third is fixed by moving the prescription to an in-network pharmacy.
What can I do if my Medicare drug plan won't cover my drug?
Three things, in order. Use the transition fill so you are not without medication. Then ask your prescriber to submit a formulary exception with a statement of why the drug is medically necessary; the plan must answer within 72 hours, or 24 hours if expedited. If the exception is denied, you can appeal to the plan within 60 days, and a standard appeal decision is due within 7 days. Along the way, ask whether a drug the plan does cover would work as well.
How long does a Medicare formulary exception take?
The plan must decide a standard coverage determination within 72 hours of receiving the request, and an expedited one within 24 hours. Your prescriber can ask for the fast track by telling the plan that waiting could seriously harm your health. The clock does not start until the plan has the prescriber's supporting statement, so the fastest path is a prescriber who sends it the same day.
Can I get a 90-day supply before my Presbyterian plan ends?
Often, yes, and December is the month to ask. Whether a 90-day fill is allowed depends on your current plan's rules, the drug, and when your last refill was, so ask the pharmacist in early December whether each maintenance drug can be filled for 90 days before December 31, 2026. It is not a guarantee, but it is the single simplest way to keep January calm.
Is New Mexico Medicare Help part of Presbyterian or Medicare?
No. New Mexico Medicare Help is a licensed independent insurance agency. We are not connected with or endorsed by Presbyterian, the U.S. government, or the federal Medicare program, and we do not offer every plan available in your area. For information on all of your options, contact Medicare.gov or 1-800-MEDICARE.
Sources
- Medicare.gov — Drug plan rules (transition fills, prior authorization, step therapy, quantity limits)
- 42 CFR §423.120(b)(3) — Transition process (govinfo.gov)
- CMS — Medicare Prescription Drug Benefit Manual, Chapter 6 (transition and long-term-care supply rules)
- CMS — Coverage determinations (72 hours standard, 24 hours expedited)
- CMS — Exceptions (formulary and tiering)
- Medicare.gov — Appeals in a Medicare drug plan (7 days standard, 72 hours expedited)
- Medicare.gov — What pharmacies can I use?
- Medicare.gov — Using the Medicare Prescription Payment Plan (switching plans)
- CMS — Final CY 2026 Part D Redesign Program Instructions ($615 deductible, $2,100 cap)
- CMS — Announcement of CY 2027 MA capitation rates and Part C and Part D payment policies ($700 deductible, $2,400 cap)
- Medicare.gov — Open Enrollment (Oct 15–Dec 7)
- Medicare.gov — Plan Compare (2027 formularies and pharmacy networks)
- CDC/NCHS — Health, United States: prescription drug use, adults 65 and older
- CDC PLACES — local health data (Bernalillo County, 2023 release)
- KFF State Health Facts — Medicare beneficiaries enrolled in Part D coverage, New Mexico (2025)
- The Santa Fe New Mexican — Presbyterian announces layoffs, ending Medicare Advantage plans (June 2026)
- Albuquerque Journal — Presbyterian Healthcare Services to drop most Medicare Advantage plans (June 2026)
- New Mexico Aging & Long-Term Services Department — SHIP counseling
Bring your prescription list. We'll check it against the 2027 plans before January does.
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