Medicare covers Januvia, but your out-of-pocket cost depends on which Medicare plan you have and which pharmacy you use

Januvia (sitagliptin) is a diabetes medication that Medicare Part D plans cover, but the price you pay at the pharmacy counter varies widely. If you have Original Medicare with a Part D prescription plan, you'll pay a copay or coinsurance — typically $10 to $50 per month for a 30-day supply, though some plans charge more. If you have a Medicare Advantage plan with prescription coverage, your cost depends entirely on that plan's formulary and your pharmacy choice. The same medication can cost $30 at one pharmacy and $80 at another, even with the same insurance.

The best way to find your actual cost is to check your plan's formulary (the list of covered drugs) and use the plan's pharmacy finder tool before you fill the prescription. Your doctor's office can also call your plan to confirm the copay. Prices change yearly when Medicare plans renew in January, so what you paid last year may not be what you pay this year.

Key Takeaways

  • Medicare Part D plans typically cover Januvia with a copay between $10 and $50 per month, though some plans charge more depending on the drug tier.
  • Medicare Advantage plans with prescription coverage cover Januvia, but the copay and which pharmacies are in-network vary by plan.
  • The same pharmacy may charge different prices depending on whether you use your Medicare plan or pay cash, so always present your insurance card.
  • You can compare costs across pharmacies using your plan's website or by calling the pharmacy directly with your plan information.
  • Januvia prices reset every January when Medicare plans renew, so your 2024 copay may differ from your 2025 copay.

How Medicare Part D covers Januvia

Part D plans place drugs into tiers, and Januvia's tier determines your copay. Most plans put Januvia on Tier 2 (preferred brand) or Tier 3 (non-preferred brand). Tier 2 copays are usually lower — often $15 to $35 per month — while Tier 3 copays run $35 to $60 or more. A few plans place it on Tier 1 (generic), which would mean a $5 to $10 copay, but this is less common because sitagliptin is a brand-name drug.

Your Part D plan also has a deductible (usually $505 to $550 in 2024, though this changes yearly) that you pay before the plan starts covering drugs. Once you meet the deductible, you pay your copay for each prescription. If you reach the coverage gap (also called the "donut hole"), your costs rise temporarily before catastrophic coverage kicks in — but for a once-daily medication like Januvia, you may not hit the gap in a single year.

Medicare Advantage plans and Januvia costs

Medicare Advantage plans (Part C) include prescription coverage, and most cover Januvia, but the copay structure is different from Part D. Some Advantage plans use copays ($20 to $50 per month), while others use coinsurance (you pay a percentage of the drug's cost, often 20 to 25 percent). A few plans have no copay for maintenance medications like Januvia if you use mail order or a 90-day supply.

Advantage plans also restrict which pharmacies you can use. If you use an out-of-network pharmacy, you may pay full price or a much higher copay. Always check your plan's pharmacy network before filling Januvia at a new location. Your plan's website has a pharmacy finder tool, or you can call the plan's customer service number on your insurance card.

Comparing prices across pharmacies

Even with the same Medicare plan, Januvia costs more at some pharmacies than others. Walmart, Walgreens, CVS, and independent pharmacies may all charge different copays for the same prescription. This happens because plans negotiate different rates with different chains, and some pharmacies offer discount programs that lower your out-of-pocket cost.

To find the lowest price, call three or four pharmacies in your area with your prescription and insurance information. Tell them your plan name and ask for the copay for a 30-day supply of Januvia. Many pharmacies also let you compare prices on their websites — enter your plan and the drug name, and the site will show your copay. If you use mail order through your plan, the copay is often the same as retail, but you get a 90-day supply, which spreads the cost over three months.

What to do if Januvia is too expensive

If your copay is higher than you expected, talk to your doctor before you skip doses or stop taking the medication. Your doctor may switch you to a generic diabetes drug that your plan covers at a lower tier, such as metformin or glipizide. Some plans cover these generics with a $5 to $10 copay.

You can also ask your doctor about patient information programs run by Januvia's manufacturer, Merck. These programs may lower or cover your copay if your income is below a certain level. Your doctor's office or the pharmacy can help you find out whether you may have access to. Additionally, if your plan's copay for Januvia is much higher than other plans available to you, you can switch plans during the annual enrollment period (October 15 to December 7 each year) to one with a lower copay for this drug.

How to check your plan's coverage before you fill the prescription

The fastest way to know your exact cost is to log into your Medicare plan's website and search the formulary for Januvia. The formulary will show the drug tier, the copay amount, and any restrictions (such as prior authorization, which means your doctor must get approval before the pharmacy fills it). If you don't have online access, call the customer service number on your insurance card and ask a representative to look up Januvia for you.

You can also ask your doctor's office to check your coverage. Many offices have staff who call insurance plans regularly and can confirm the copay in minutes. This step takes five minutes and saves you from a surprise at the pharmacy counter. If your doctor prescribes Januvia and you find out the copay is too high, you still have time to ask for a different medication before the prescription is filled.

Frequently Asked Questions

Does Medicare cover generic sitagliptin instead of brand-name Januvia?

Yes. Generic sitagliptin is available and usually costs less than brand-name Januvia. Most Medicare plans cover both, and the generic copay is typically $5 to $15 lower per month. Ask your doctor or pharmacist whether generic sitagliptin will work for you — it is the same medication and works the same way.

What happens to my Januvia copay if I move to a different state?

Your copay may change because each state has different Medicare plans available. When you move, you can switch to a new plan during the annual enrollment period or within 60 days of moving. Contact Medicare at 1-800-MEDICARE to learn which plans are available in your new state and what they charge for Januvia.

Can I use a GoodRx coupon or discount card instead of my Medicare plan?

Sometimes. If the discount card price is lower than your Medicare copay, you can use it — but you cannot use both at the same time. Tell the pharmacist you want to pay cash and use the discount card, not your Medicare plan. However, using a discount card means the cost does not count toward your Part D deductible or out-of-pocket maximum, so compare the total cost for the year, not just one month.

Will my Januvia copay change next year?

Yes. Medicare plans change their formularies and copays every January. Your copay for Januvia may go up, down, or stay the same depending on the plan you choose. In October, Medicare sends you a notice listing changes to your plan. Review it carefully, and if your copay is rising significantly, you can switch to a different plan during open enrollment.

What if my doctor says I need brand-name Januvia and not the generic?

If your doctor writes "brand medically necessary" on the prescription, your plan may cover brand-name Januvia at the generic copay instead of the brand copay. However, this requires prior authorization — your doctor must submit a request to the plan explaining why the generic will not work for you. This process takes a few days, so ask your doctor to submit the request before you need the medication filled.