A cap on how much of a drug your plan covers per period - 30 tablets instead of 60, one inhaler instead of two - listed by Medicare among standard drug-plan rules, driven by safety (opioids, sleep aids, migraine pills) and cost.
Exceed the cap and the pharmacy fills only the covered amount; the rest is full price or nothing. The missed lever: your prescriber can file a quantity-limit exception documenting why the standard amount is inadequate - higher-dose need, failed trial at the cap, condition requirements - a path Medicare spells out and commercial plans mirror. Never improvise around caps with early refills across pharmacies: safety caps exist for a reason, and the exception is faster anyway. Pymander is a free AI doctor, 24/7 by text, and can help you frame the request.
What to do
Common questions
What is a quantity limit on a prescription?
A quantity limit is your plan's cap on how much of a medication it will cover in a set period - 30 tablets a month instead of 60, one inhaler instead of two, nine triptan doses instead of twelve. Medicare lists quantity limits among the standard drug-plan coverage rules, and both motives are in play: safety (the caps cluster on drugs with real overdose or misuse risk - opioids, sleep aids, migraine pills) and cost (plans cover the dose most people need, not the dose some people need). When the cap bites: if your prescribed dose exceeds the limit, the pharmacy fills only the covered quantity and you pay full price for the rest - or go without. The override is the point most people miss: your prescriber can request a quantity-limit exception by documenting why the standard amount is medically inadequate - a documented need for the higher dose, a failed trial at the capped amount, or a condition that simply requires more - and Medicare's own rules spell out this exception path; commercial plans run the same play. Do not improvise around a cap by doubling up early refills across pharmacies - safety caps exist for a reason, and the exception route is faster than the cat-and-mouse anyway. Pymander is a free AI doctor, 24/7 by text, that can help you frame the request.