The November Sequence: Deciding Which Prescriptions Cross the Border Before December 7

Open enrolment for Medicare Advantage and stand-alone Part D plans opened on 15 October and closes at the end of 7 December 2026. Employer plans run their own windows, and most of them land in the same stretch of the calendar. For a household that fills some prescriptions at the local pharmacy and others from a licensed Canadian source, this is the month when the two halves of the medicine cabinet get sorted for the year ahead.

The deadline is real. The decision, however, is not large — provided it is broken into steps and taken in sequence. What follows is a dated checklist for the weeks between today and 7 December, built for a household that already knows it will buy at least part of its supply north of the border.

Why the Calendar Is Not the Enemy

Most enrolment anxiety comes from doing everything at once in the final week: reading formularies, estimating costs, calling pharmacies and choosing a plan on the same afternoon. Sequenced properly, the work divides into five small tasks of roughly an hour each. The order matters more than the speed.

12–15 November: Write the List, Not the Wish List

Before any plan document is opened, produce one accurate inventory of every medication currently taken, including the ones you consider trivial. For each entry, record the molecule or brand name, the strength, the dosage form, the directions, and the number of units used in a year — not the number of refills, the number of tablets or millilitres.

Two additions make the list genuinely useful. Note the price you paid for the last fill on each side of the border, and note any medication that is temperature-sensitive or subject to a quantity limit. That inventory becomes the single document you consult for every step that follows.

16–20 November: Read the Formulary, Not the Brochure

Plan marketing material describes networks and extras. The formulary describes what is actually covered, at which tier, and under what conditions. Download the current formulary for every plan you are seriously considering — not last year's copy, and not a summary page.

For each medication on your list, note four things: whether it appears at all, its tier, whether prior authorisation or step therapy applies, and whether a quantity limit would constrain a 90-day fill. A drug that was tier two last year can be tier three, or excluded, or moved behind a prior authorisation requirement, without any announcement reaching you personally.

21–25 November: Two Prices on One Line

Now do the arithmetic that the whole exercise exists to support. Build a single table with one row per medication and three columns: the annual cost under the candidate plan, the annual cash price from your Canadian source, and the annual cash price at a local pharmacy without insurance.

The third column is not padding. Part D and employer plans do not reimburse purchases made from a Canadian pharmacy, so the northern spend is entirely out of pocket. Comparing a Canadian cash price against a plan's copay is only half the comparison; comparing it against the American cash price tells you what the coverage is genuinely worth on that drug.

Add the fixed costs that a copay table hides: the deductible, any coinsurance that applies after it, dispensing fees, shipping, and the exchange rate on the day you calculate. Currency movement is small over a year but it is not zero, and a calculation built on a favourable rate should carry a modest cushion.

When the table is finished, the division usually suggests itself. A expensive brand drug with a high tier and no generic equivalent frequently belongs north of the border for the whole year. A cheap generic sitting on tier one with a low copay often belongs at home, where the convenience is worth more than the difference. Most households end up with a mixed cabinet rather than an all-or-nothing arrangement.

26–30 November: Confirm the Northern Side

Before committing the plan year, confirm the Canadian half of the arrangement in the same week. Ask your Canadian pharmacy to confirm current availability of each item on the list, whether any of them sit on a backorder, and whether the quantity you intend to order can be supplied on the schedule you intend to order it. Ask, too, about the dispensing fee structure on multiple medications shipped together.

This is also the week to check that your prescription documentation is current and that your prescriber is prepared to continue authorising refills into the new year. A plan chosen around a Canadian source is only as good as the prescription that supports it.

1–7 December: Enrol, Then Confirm in Writing

Submit the enrolment before the final day, and keep the confirmation. If you are enrolling in a Part D or Advantage plan, save the confirmation number and the date. If you are electing an employer plan, save the benefits summary.

Then do the part most people skip: once the new plan documents arrive, re-check the formulary for the medications you intend to keep at home. Formularies can be revised between the published version and the start of the plan year, and a January surprise is easier to absorb than a February one.

The Things That Quietly Change on 1 January

Four items reset with the calendar: the deductible, the tier structure, the network of participating pharmacies, and the annual out-of-pocket cap, which is indexed each year rather than fixed. None of these requires alarm, but each should be noted on the same page as your medication list, because each changes the arithmetic you just completed.

What Not to Do in the Final Week

Do not enrol on 7 December on the basis of a brochure. Do not assume the plan you hold now will cover the same drugs in the same way next year. Do not cancel or pause a Canadian order before the new plan card is in hand if the medication in question is one you take daily. And do not treat the Canadian portion of the cabinet as an emergency substitute for coverage — it is a planned purchase that works best when it is scheduled.

The deadline is fixed, but the decision is a table with three columns and a list of medications. Drawn up in mid-November, it takes an afternoon. Left to the first week of December, it takes a week of evenings.