Does original Medicare cover prescription drugs for seniors?

Original Medicare (Part A and Part B) does not cover retail prescription drugs.

How to Get Prescription Drug Coverage

• Medicare Part D: You can buy a separate, stand-alone Medicare Part D plan from a private company to add drug coverage to Original Medicare.
• Medicare Advantage (Part C): You can join a bundled Medicare Advantage Plan that combines Part A, Part B, and usually prescription drug coverage into a single plan.

What is Covered Instead

• Part B Drugs: Original Medicare Part B covers a limited number of outpatient prescription drugs, such as certain vaccines (like flu and pneumonia), injectable drugs given at a doctor's office, and some immunosuppressive drugs.
• Excluded Drugs: Standard prescription plans do not cover items like weight-loss drugs, over-the-counter medications, or cosmetic medicines.

The best Medicare prescription drug plan (known as Part D) depends on the specific medications you take, but top national providers for 2026 include Wellcare for low premiums, Humana for low out-of-pocket costs, and UnitedHealthcare (AARP) for low deductibles.

Top-Rated Part D Providers

• Wellcare: Best for low monthly premiums, with some budget-friendly plans costing $0 per month.
• Humana: Best for low out-of-pocket costs, offering $0-premium options and $0 copays on select drug tiers in many states.
• UnitedHealthcare (AARP): Best for low deductibles, featuring widely available plans with waived deductibles for basic generic tiers.
• Aetna (SilverScript): Best for overall plan quality and steady insulin pricing options.

Key Rules to Keep in Mind

• Out-of-Pocket Cap: All Part D plans feature a government-mandated out-of-pocket maximum ($2,100 in 2026 and $2,400 in 2027), meaning you pay $0 for covered drugs once you hit this limit.
• Insulin Savings: Out-of-pocket costs for standard insulin are capped at $35 per month under the law.
• Formulary Check: Plans change their drug lists (formularies) every year. A plan that is cheap for someone else might not cover your specific pills.

How to Find Your Best Match

1. Go to the official Medicare Plan Finder tool.
2. Type in your ZIP code.
3. Enter all your current prescriptions, dosages, and preferred local pharmacy.
4. Sort the results by lowest total cost (monthly premium plus estimated yearly drug costs).

The first 10 prescription drugs subject to Medicare-negotiated Maximum Fair Prices, effective January 1, 2026, include treatments for conditions such as cardiovascular disease, diabetes, immunology, and oncology. The full list of medications along with their primary indications can be found in the referenced sources, and further details are available in the official CMS Guidance on Selected Drugs and Negotiated Prices.

Original Medicare (Parts A and B) does not cover most outpatient prescription drugs taken at home, requiring separate enrollment in a Medicare Part D plan or a Medicare Advantage plan with drug coverage.

Categories of Drugs Never Covered by Medicare

Even with a Part D plan, national Medicare guidelines completely exclude certain types of medications from coverage:

• Weight loss or weight gain: Drugs used specifically for anorexia, weight loss, or weight gain (such as phentermine or Xenical), though exceptions exist for conditions like cancer or AIDS wasting.
• Cosmetic purposes: Medications for hair growth (like Propecia) or skin treatments intended solely for appearance.
• Sexual dysfunction: Treatments for erectile dysfunction (such as Viagra or Cialis).
• Fertility: Drugs that promote fertility, such as Clomid.
• Cough and cold relief: Over-the-counter and prescription products strictly for symptomatic relief of colds or coughs.
• Vitamins and minerals: Prescription vitamins and mineral products, with the exception of prenatal vitamins and fluoride preparations.
• Over-the-counter (OTC) drugs: Any medication that does not require a prescription.
• Non-FDA-approved products: Medications not approved by the Food and Drug Administration or classified as DESI drugs (safe but lacking proven efficacy).

Formularies and Plan-Specific Exclusions

• Formulary gaps: Every private Part D plan maintains its own list of covered medications called a formulary. If a medically necessary prescription is not on your specific plan's formulary, your plan will not cover it unless you request an formal exception.
• Off-label uses: Uses not approved by the FDA are generally excluded unless supported by official Medicare-approved compendia.

Medicare Part D prescription drug coverage costs vary depending on the plan you choose, your income, and the medications you take. The average estimated monthly premium for a stand-alone Medicare Part D plan is $34.50 in 2026 (projected to slightly increase to $36.00 in 2027).

The total cost of Part D is broken down into four main out-of-pocket categories:

1. Monthly Premiums

• Stand-Alone Plans (PDP): Average $34.50 per month in 2026. Plans range from under $10 to over $100 depending on the provider and region.
• Medicare Advantage Plans (MA-PD): If you bundle your drug coverage with a Medicare Advantage plan, the drug portion of the premium averages $11.32 to $11.50 per month in 2026, with many plans offering a $0 drug premium.
• Income Surcharges (IRMAA): If your modified adjusted gross income from two years prior is above a certain threshold (e.g., above $109,000 for individuals in 2026), you must pay an extra monthly surcharge ranging from $14.50 to $91.00 on top of your plan's premium.

2. Annual Deductible

The maximum annual deductible any Part D plan can charge is $615 in 2026 (rising to $640 in 2027). Some plans offer a $0 deductible, meaning coverage begins with your first prescription fill.

3. Copayments and Coinsurance

Once you meet your deductible, you pay a share of the cost for each prescription:

• Copayments: A flat fee (e.g., $5 or $10) typically used for lower-tier generic medications.
• Coinsurance: A percentage of the drug's cost (e.g., 25%), which usually applies to higher-tier or brand-name specialty drugs.
• Insulin Cap: Under the Inflation Reduction Act, all covered insulin products are strictly capped at $35 for a one-month supply across all coverage phases.

4. Out-of-Pocket Maximum

Your maximum out-of-pocket spending for covered prescription drugs is capped at $2,100 in 2026 (increasing to $2,400 in 2027). Once your spending reaches this limit, you enter the "catastrophic coverage phase" and pay $0 for your covered medications for the remainder of the calendar year. Premium costs do not count toward this limit.

Late Enrollment Penalty

If you go 63 days or more in a row without "creditable" prescription drug coverage after your initial Medicare enrollment period, a permanent penalty is added to your monthly premium. This penalty is calculated as 1% of the national base beneficiary premium ($38.99 in 2026) for every full month you went uncovered.