Prescription Drug Coverage for Californians
If you take any prescription medications — and most Medicare beneficiaries do — Part D is how you keep costs manageable. The Inflation Reduction Act introduced an annual out-of-pocket cap on Part D drugs — $2,000 in 2025, increasing to $2,100 in 2026. For Californians taking expensive medications for conditions like cancer, rheumatoid arthritis, or hepatitis C, this cap can save thousands per year.
Two Ways to Get Drug Coverage in California
You have two paths to Part D coverage, and the right one depends on how you’ve structured your overall Medicare:
- Standalone Part D plans (PDPs): Pair these with Original Medicare (and optionally Medigap). California typically has 20+ standalone PDPs available — each with different formularies, pharmacies, and pricing.
- Medicare Advantage with drug coverage (MA-PD): Most California MA plans bundle prescription coverage into the plan. If you’re on Medicare Advantage, this is usually the simplest path.
The $2,100 Cap — What It Means for You
Before 2025, some Californians paid $8,000, $10,000, or more per year for medications. Now, once your out-of-pocket drug costs hit $2,100 in a calendar year, your plan covers 100% of remaining drug costs for the rest of that year. This applies to every Part D plan — no exceptions.
Medicare Prescription Payment Plan
Starting in 2025, you can also spread your out-of-pocket drug costs into predictable monthly payments throughout the year instead of paying large amounts at the pharmacy counter. Ask your plan about the Medicare Prescription Payment Plan option.
How Part D Drug Pricing Works
Part D plans organize medications into tiers — the higher the tier, the more you pay:
| Tier | Type of Drug | Typical Cost |
|---|---|---|
| Tier 1 | Preferred generics | $0 – $15 copay |
| Tier 2 | Non-preferred generics | $10 – $25 copay |
| Tier 3 | Preferred brand-name | $30 – $50 copay |
| Tier 4 | Non-preferred brand-name | 25% – 40% coinsurance |
| Tier 5 | Specialty medications | 25% – 33% coinsurance |
Costs vary by plan. These are typical ranges for California PDPs in 2026.
Insulin Is Capped at $35/Month
Thanks to the Inflation Reduction Act, all insulin products covered by your Part D plan are capped at $35 per month per prescription. This applies whether you use vials, pens, or biosimilar insulin — a significant savings for California’s large diabetic Medicare population.
Extra Help for Low-Income Californians
If your income and savings are limited, you may qualify for Extra Help (Low-Income Subsidy), which pays most of your Part D costs — premiums, deductibles, and copays. Dual-eligible Californians (those with both Medicare and Medi-Cal) automatically receive Extra Help.
Apply at ssa.gov/extrahelp or call 1-800-772-1213. Your local HICAP counselor can also help with the application.
Comparing Part D Plans in California
The cheapest premium isn’t always the cheapest plan. To find the right fit:
- Enter your exact medications (name, dosage, frequency) into a plan comparison tool
- Check which tier each drug falls on in different plans
- Confirm your pharmacy (or a convenient alternative) is in the plan’s preferred network
- Compare total estimated annual cost — not just the monthly premium
Compare Part D plans in your California zip code at PlanMatch.com →
The Late Enrollment Penalty
If you go 63 or more consecutive days without creditable drug coverage after your Initial Enrollment Period, you’ll pay a permanent penalty: 1% of the national base premium for each month you were uncovered. This penalty is added to your Part D premium for as long as you have coverage.