Medicare Drug Price Negotiation
Why didn't my copay drop when negotiated prices started?
Last reviewed: · Big Sioux Benefits Data Desk
Because a negotiated price sets what the drug costs, while your copay is set by your plan's cost sharing for the tier that drug sits on. If your plan charges a flat dollar copay for that tier, your payment was never a percentage of the drug's price, so cutting the price by half does not cut your copay by half. It may not change it at all.
The qualifier: this is not a loophole or a plan behaving badly. It is how tiered cost sharing has always worked. The negotiated price still matters enormously, it just lands on Medicare's side of the ledger rather than yours, until you are in a phase where you pay a percentage or pay the price directly.
When you feel the negotiated price, and when you do not
| Where you are | Do you see the lower price? | Why |
|---|---|---|
| In the deductible phase | Yes | You pay the drug's actual price, which is now lower |
| Plan charges coinsurance | Yes | Your percentage is applied to a smaller number |
| Plan charges a flat copay | Usually no | Your payment is set by the tier, not the price |
| You have reached the $2,100 cap | No, you already pay $0 | Nothing left to reduce |
| You get Extra Help | Largely no | Your costs are already fixed low amounts |
There is one indirect benefit even when your copay is flat: because the drug costs less, you accumulate toward the $2,100 out-of-pocket cap more slowly, which sounds bad but usually is not, since it means your total spending for the year is genuinely lower. If you were reaching the cap before and now do not, you are paying less overall, not more. If you believe the negotiated price is simply not being applied to your claim, call your plan and ask them to review it, and call 1-800-MEDICARE if the plan cannot resolve it.
Sources
- CMS — Medicare Drug Price Negotiation Program: Negotiated Prices for Initial Price Applicability Year 2026 — prices effective January 1, 2026; accessed 2026-08-21
- Medicare.gov — Costs for Medicare drug coverage — accessed 2026-08-21
- CMS — Announcement of Calendar Year 2026 Medicare Advantage Capitation Rates and Part C and Part D Payment Policies (Part D benefit parameters) — CY2026 parameters; accessed 2026-08-21
Related questions
Is my plan allowed to keep charging the same copay?
Yes. Plans set cost sharing by tier within CMS rules, and a flat copay does not have to change when a drug's underlying price changes. The negotiated price governs what is paid for the drug, not what a plan may charge a member for its tier.
Would a different plan pass more of the savings to me?
Possibly, if it uses coinsurance rather than a flat copay for the drugs you take, or places them on a lower tier. That is worth checking during the fall enrollment window, comparing your actual drug list rather than premiums alone.
Drug costs turn on your specific prescriptions, so the arithmetic is worth doing once, properly: book a free, no-pressure conversation, see your county's South Dakota plan lineup, or browse all answers. SHIINE, the state's free counseling program, is at 1-800-536-8197 and sells nothing.
Big Sioux Benefits is a licensed insurance agency, not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Contact Medicare.gov, 1-800-MEDICARE, or SHIINE (South Dakota's SHIP) for all of your options.