Medicare Part D in Hawaii — prescription drug coverage
Part D provides outpatient prescription drug coverage. 2026 brings the biggest change in Part D history: a hard $2,100 annual out-of-pocket maximum on covered drugs.
How Part D works in Hawaii
Part D plans are offered by private insurance companies approved by Medicare. You can get Part D coverage two ways:
- Standalone Prescription Drug Plan (PDP) — pairs with Original Medicare or some Medicare Advantage Private Fee-for-Service plans
- Medicare Advantage Prescription Drug plan (MA-PD) — drug coverage built into a Medicare Advantage plan
2026 changes you need to know
- Insulin: Capped at $35/month per prescription, with $0 deductible
- Vaccines: All ACIP-recommended vaccines covered at $0 cost-sharing
- Medicare Prescription Payment Plan: New 2026-and-onward option to spread your annual out-of-pocket costs into monthly installments rather than paying all at once at the pharmacy
- Negotiated drug prices: A second round of Medicare-negotiated prices begins to take effect for selected drugs
2026 Part D costs
| Cost element | 2026 |
|---|---|
| Maximum deductible | $615 (plans may charge less; some $0) |
| Out-of-pocket maximum | $2,100 (new — first time ever) |
| Insulin copay | $35/month per prescription |
| Vaccines (ACIP-recommended) | $0 |
| Plan premium | Varies; Hawaii plans typically $0–$80/month |
If your income exceeds certain thresholds, you'll also pay an Income-Related Monthly Adjustment Amount (Part D-IRMAA) on top of the plan premium.
Extra Help (Low-Income Subsidy)
If your income is below approximately $23,475/year for individuals or $31,725 for couples (2025 thresholds, updated annually), you may qualify for Extra Help — Medicare's Low-Income Subsidy. Extra Help can:
- Cover all or most of your Part D premium
- Waive your deductible
- Cap copays at $4.90 generic / $12.15 brand-name in 2026
Apply through the Social Security Administration. Many Hawaii residents qualify but don't apply. Learn more about Extra Help and other assistance.
Hawaii Part D considerations
Pharmacy networks: Most Part D plans have preferred and standard pharmacies. Preferred pharmacies typically have lower copays. Verify that pharmacies on your home island (and any island you visit) are in your plan's network — and ideally preferred.
Mail-order: For maintenance medications, mail-order pharmacies often offer lower copays and 90-day supplies. This is especially convenient for neighbor-island residents.
Multilingual pharmacy support: Hawaii residents who prefer language assistance for prescription review can request bilingual support — many large pharmacy chains have Tagalog, Ilocano, Japanese, Chinese, and Korean speakers on staff.
Frequently asked questions
Starting in 2026, no Medicare beneficiary will pay more than $2,100 out-of-pocket for covered Part D drugs in a calendar year. Once you reach the cap, your cost-sharing drops to $0 for the remainder of the year.
It's an option that lets you spread your Part D out-of-pocket costs into monthly installments rather than paying at the pharmacy. Useful if you have high upfront costs early in the year. You can opt in through your Part D plan.
Most experts recommend enrolling in Part D when you're first eligible, even if you don't take medications. If you go without creditable drug coverage for 63+ days after eligibility, you'll face a permanent late enrollment penalty when you do enroll.
Drugs received through IHS or VA pharmacies are covered through those programs separately. If you also enroll in Part D, you can fill prescriptions at either system or at Part D network pharmacies — your choice. Note that VA and IHS coverage counts as creditable drug coverage.