Switching Health Plans? How to Check Generic Drug Coverage and Save Money

Why Generic Drug Coverage Matters More Than You Think

When you switch health plans, most people focus on monthly premiums, doctor networks, or hospital coverage. But one of the biggest surprises-and most expensive mistakes-comes from generic drug coverage. If you take even one regular medication, skipping this step can cost you hundreds or even thousands of dollars a year.

Here’s the reality: 90% of all prescriptions filled in the U.S. are generics. They work just like brand-name drugs but cost a fraction of the price. Insurance companies know this, so they structure their plans to push you toward generics. But not all plans treat them the same. Some charge $3 a month. Others make you pay the full deductible before you get any coverage. That difference isn’t minor-it’s life-changing for people managing diabetes, high blood pressure, or thyroid conditions.

How Formularies Work: The Hidden Rules Behind Your Copay

Your plan’s formulary is the official list of drugs it covers, divided into tiers. Each tier has a different price. The key to saving money? Knowing which tier your generic is in-and how that tier works with your deductible.

Most plans use 3 to 5 tiers:

• Tier 1: Preferred generics. Usually $3-$20 for a 30-day supply. This is where you want your meds to be.
• Tier 2: Non-preferred generics or brand-name drugs with generic alternatives. Often $30-$50.
• Tier 3: Preferred brand-name drugs. $50-$100.
• Tier 4 and 5: Non-preferred brands and specialty drugs. These can cost hundreds.

But here’s what no one tells you: not all generics are created equal. Your plan might cover metformin (a common diabetes drug), but only if it’s made by Manufacturer A. Switch to Manufacturer B? Suddenly, it’s a Tier 2 drug. Same active ingredient. Same effectiveness. Different price. That’s why you can’t just look up the drug name-you need the exact brand and dosage.

Marketplace Plans vs. Medicare vs. Employer Plans: What’s Different?

Not all health plans follow the same rules. The type of plan you’re switching to changes how your generics are covered.

Marketplace plans (Healthcare.gov) must follow federal rules. Silver-level plans with Standardized Plan Design (SPD) waive the deductible for Tier 1 generics. That means you pay just $20 or less per prescription-no matter how much you’ve spent on medical care. These plans are the best deal if you take regular generics. In 2025, 32 states offer expanded SPD options with $10 copays.

High-deductible health plans (HDHPs) are trickier. They combine your medical and prescription deductibles. So if your deductible is $3,000, you pay full price for every pill until you hit that number. That’s a disaster if you need daily meds. Some HDHPs have separate prescription deductibles, but most don’t. Always check.

Medicare Part D has its own system. The base deductible in 2025 is $505, but many plans waive it for Tier 1 generics. Copays range from $0 to $10. Medicare Advantage plans with drug coverage (MA-PDs) often have lower out-of-pocket costs than standalone Part D plans-by about 18% on average. But watch out: formularies change every year. A drug that was Tier 1 last year could move to Tier 2.

Employer plans vary wildly. Some companies offer $5 copays for generics. Others make you pay full price until you meet a $1,500 deductible. If you’re switching jobs, don’t assume your current meds will be covered the same way.

State Rules Can Make or Break Your Savings

Where you live matters. States have their own rules that override federal guidelines.

• In New York, generic copays are often $0 or $7 before any deductible.
• In California, you pay a $85 outpatient drug deductible first, then 20% coinsurance (capped at $250 per year).
• In Washington D.C., there’s a separate $350 drug deductible with a $150 cap on specialty drugs.

These differences aren’t theoretical. A person in New York taking three generics might pay $0 a month. In California, they could pay $40 a month-$480 a year. That’s a $480 gap just from geography.

How to Check Your Medications Before You Switch

Don’t guess. Don’t rely on a sales rep. Do this four-step check before you sign up for a new plan:

1. Get the full formulary-not just the summary. Look for the PDF or searchable list on the insurer’s website.
2. Search for every drug you take, including dosage and manufacturer. Type in “metformin 500mg, Teva” not just “metformin.”
3. Check your pharmacy network. Some plans charge 3-4 times more if you use a non-preferred pharmacy. Use CVS, Walgreens, or your local pharmacy? Confirm they’re in-network.
4. Calculate your annual cost. Multiply your monthly copay by 12. Add any deductible you must meet. Include mail-order discounts if you use them.

People who do this reduce unexpected drug costs by 73%, according to CMS data. Those who skip it? They’re the ones calling their insurer in March, confused why their $5 pill suddenly costs $45.

Tools That Actually Work

You don’t need to dig through 50 pages of fine print. Use these free tools:

• Medicare Plan Finder (medicare.gov/plan-compare): Best for seniors. Lets you enter all your drugs and compares plans side by side.
• Healthcare.gov Plan Selector: Filters plans by drug coverage. Shows you which ones waive deductibles for generics.
• eHealthInsurance’s Prescription Calculator: Processes over 1.7 million queries a month. Fast, simple, accurate.
• Insurer-specific tools: Blue Cross, UnitedHealthcare, and Humana all have their own formulary searchers. These are usually the most accurate-96% accuracy vs. 78% on third-party sites.

Use at least two tools. Cross-check. If one says your drug is Tier 1 and another says Tier 2, call the insurer. Don’t trust the website alone.

What No One Tells You About Generic Switches

Manufacturers change. And when they do, your plan might stop covering your version.

Example: You take generic levothyroxine made by Mylan. Your plan covers it at $3. In January, your insurer switches to a different manufacturer-Teva. Mylan’s version is no longer on the formulary. Now your drug is Tier 2: $35. You don’t get a notice. You don’t find out until you refill your prescription.

This happens to 15% of Medicare beneficiaries every year. The American Pharmacists Association found that 68% of people switching plans don’t check if their specific generic version is still covered. They assume “generic” means “same price.” It doesn’t.

What’s Changing in 2025

Things are shifting fast. Here’s what to watch:

• Medicare Part D is adding a new tier: Tier 1+ for non-preferred generics. This could raise costs for people on older generic versions.
• $35 insulin cap is now permanent. If you take insulin, you pay no more than $35 a month-no matter your plan.
• $2,000 out-of-pocket cap for Medicare Part D starts in 2025. Once you hit that, your drugs are free for the rest of the year.
• AI tools like Medicare Plan Scout (launched in 2023) are now helping users avoid errors. In pilot tests, they cut enrollment mistakes by 44%.

These changes make it easier to predict costs-but only if you stay informed.

Real People, Real Savings

One woman in Seattle switched from a high-deductible plan to a Silver SPD plan. She takes three generics: metformin, lisinopril, and levothyroxine. Her old plan had a $3,000 deductible. She paid $1,800 a year just for pills. Her new plan? $3 copays. Total annual cost: $108. She saved $1,692.

A retired veteran in Florida used Medicare Plan Finder and found a plan that covered his generic blood pressure med at $0. His previous plan charged $12. That’s $144 saved a year-money he now uses for groceries.

These aren’t outliers. They’re people who took 30 minutes to check their formulary. That’s all it took.

Final Checklist Before You Switch

• ☐ I have a full list of all my medications, including dosage and manufacturer.
• ☐ I checked the new plan’s formulary for each drug-not just the summary.
• ☐ I confirmed my pharmacy is in-network.
• ☐ I calculated my annual cost: copays + deductible + mail-order savings.
• ☐ I used at least two tools to verify my findings.
• ☐ I called the insurer to confirm one drug I’m unsure about.

If you check all these boxes, you’re ahead of 80% of people switching plans. And you won’t be the one shocked by your pharmacy bill next month.

Next Steps: What to Do Today

If you’re thinking about switching plans, don’t wait. Right now, get your current list of medications. Open your insurer’s formulary page. Search each drug. Write down the tier and copay. Then, do the same for any plan you’re considering. Compare the totals. If your annual cost drops by $500 or more, it’s worth switching.

Don’t let a small oversight cost you big. Generic drugs are the cheapest way to treat chronic conditions. But only if your plan lets you use them without a financial penalty. Take 30 minutes today. You’ll thank yourself next January when your pharmacy bill is lower than last year’s.