Key Changes for Part D in 2026
The Inflation Reduction Act continues to reshape Part D in 2026:
- $2,000 out-of-pocket cap - once you spend $2,000 on covered drugs, you pay $0 for the rest of the year
- Medicare Prescription Payment Plan - spread your out-of-pocket costs across monthly installments
- Vaccine coverage - most recommended vaccines are covered at $0 cost-sharing
- Insulin cap - insulin costs capped at $35/month per covered insulin
The $2,000 OOP cap is a significant benefit for people who take expensive brand-name or specialty drugs. If you previously hit the coverage gap, you'll likely see substantial savings in 2026.
Average Part D Costs in 2026
National averages for standalone Part D plans in 2026:
| Cost Type | 2026 Amount | Notes |
|---|---|---|
| Average Monthly Premium | ~$46/month | Varies widely by plan and region |
| Maximum Deductible | $615 | Some plans have $0 deductible |
| Out-of-Pocket Cap | $2,000 | New for 2025, continuing in 2026 |
| Insulin Cap | $35/month | Per covered insulin product |
Top-Rated Part D Plan Sponsors in 2026
Several plan sponsors consistently receive high CMS star ratings:
- SilverScript (CVS Health) - largest enrollment, competitive premiums
- Humana Walmart Value Rx - low premium option with Walmart pharmacy network
- WellCare Value Script - low-cost option in many regions
- UnitedHealthcare Walgreens Rx - preferred pricing at Walgreens
- Aetna Medicare Rx - broad formulary coverage
Plan star ratings and availability change annually. Use Medicare.gov's Plan Finder tool to compare plans based on your specific medications and preferred pharmacy.
How to Compare Part D Plans
Follow these steps to find the best plan for your needs:
- List all your current medications (drug name, dosage, frequency)
- Go to Medicare.gov Plan Finder and enter your drugs and preferred pharmacy
- Compare total estimated annual costs (premium + deductible + copays) - not just the monthly premium
- Check the star rating (5-star plans offer the best quality and service)
- Review the pharmacy network to ensure your preferred pharmacy is in-network
- Check for prior authorization or step therapy requirements on your drugs