Januvia is Merck’s brand name for sitagliptin, the original DPP-4 inhibitor, taken as one tablet a day in 25 mg, 50 mg, or 100 mg strengths for type 2 diabetes. It has been on the U.S. market since 2006, and for most of that time it had no generic competitor and no published cash price.
Both of those things changed inside twelve months. The FDA approved the first generic sitagliptin at the end of 2025, manufacturers launched in the spring of 2026, Medicare’s negotiated price took effect January 1, 2026, and Merck opened a direct cash-pay channel with a published number. The result is a drug with four different legitimate prices depending on who you are and where you buy, and a spread between them of more than $600 a month. Everything below was verified on September 1, 2026.
What Does Januvia Cost Without Insurance?
Brand prices come from Merck’s own cash-pay program and the federal TrumpRx listing. Generic prices come from Cost Plus Drugs and TrumpRx’s sitagliptin page. Retail figures come from SingleCare’s live Januvia page for the 100 mg strength, updated September 2, 2026. The negotiated price comes from the CMS 2026 maximum fair price fact sheet.
| Option | Low | Average | High |
|---|---|---|---|
| Generic sitagliptin 100 mg, 30 tablets, Cost Plus Drugs | $40.89 + $5.25 shipping | $46.14 | $46.14 |
| Brand Januvia, 30-day supply, Merck Cash-Pay Gateway | $84.57 | $84.57 | $84.57 |
| Generic sitagliptin, 30 tablets, retail counter with a coupon | $102.68 | $272.40 (Amazon Pharmacy) | $321.70 |
| Brand Januvia 100 mg, 30 tablets, discount card at retail | $39.17 (CVS) | $279.34 (Kroger, Harris Teeter) | $301.00 (Walmart) |
| Brand Januvia 100 mg, 30 tablets, no card, average retail | $681.99 | $681.99 | $681.99 |
| Medicare Part D negotiated price (Part D enrollees only) | $113.00 | $113.00 | $113.00 |
| Merck Patient Assistance Program (income limits apply) | $0 | $0 | $0 |
The sources disagree sharply on what “the price” of brand Januvia is, and that disagreement is real rather than an error. TrumpRx cites a $330.00 reference price for 30 brand tablets, CMS recorded a $527.00 list price for 2023, and SingleCare observes a $681.99 average retail cash price. Those measure three different things, so the honest cross-source range on brand Januvia at full freight is roughly $330 to $682. The point for a cash payer is that none of those numbers is the price you have to pay.
The generic launched, but it did not get cheap everywhere
The FDA approved the first generic sitagliptin phosphate tablet on December 30, 2025, going to Watson Laboratories under ANDA 202327. Sandoz announced its U.S. launch on May 26, 2026 and Apotex on June 2, 2026, covering 25 mg, 50 mg, and 100 mg tablets.
Four months later, the generic price is all over the map. Cost Plus Drugs sells 30 tablets of the 100 mg strength for $40.89, against a $140.70 comparison price it lists for other pharmacies. On the same day, TrumpRx’s generic sitagliptin page showed local pharmacy coupon prices of $102.68 at CVS and Navarro, other nearby counters at $288.94 to $321.70, and Amazon Pharmacy home delivery at $272.40. That is roughly an eight-fold spread on an identical generic tablet.
Merck says the quiet part out loud on its own site: it warns that products in its cash-pay program may now have generic equivalents that are not available through the program, and that patients may find lower prices outside it. Merck also excludes Massachusetts and California residents from the cash-pay program for any product that has a generic.
What Drives the Price
Brand versus generic, and where you buy the generic. Generic sitagliptin at Cost Plus ($40.89) is less than half the brand cash-pay price ($84.57). Generic sitagliptin at a retail counter ($102.68 to $321.70) is more than the brand cash-pay price. The word “generic” does not by itself mean cheaper here.
Which channel you use for the brand. Merck’s Cash-Pay Gateway routes the prescription to EVERSANA Pharmacy, which dispenses and delivers. That $84.57 price does not exist at a walk-in counter.
Whether you are on a government program. The Merck Cash-Pay Gateway excludes anyone with Medicare, Medicaid, TRICARE, CHAMPUS, the Puerto Rico Government Health Insurance Plan, or any other federal or state pharmacy benefit, even if a particular prescription is not covered.
Your state. Massachusetts and California residents are barred from the Merck program for any product with a generic equivalent, which now includes Januvia.
Strength and quantity. Sitagliptin comes in 25 mg, 50 mg, and 100 mg, filled in 30, 60, and 90 counts. Cost Plus prices all three strengths and all three counts, and the per-month cost drops on longer fills.
Cash Price vs. Insurance
CMS negotiated a maximum fair price of $113.00 for a 30-day supply of Januvia, effective January 1, 2026. That is a 79% discount from the $527.00 list price CMS recorded for 2023, the deepest cut of the ten drugs in the first negotiation round. Januvia accounted for $4.1 billion in Part D gross covered drug costs in 2023, with 843,000 Part D enrollees using it.
As with Farxiga, that negotiated price is not automatically the best price available. A cash payer using Merck’s channel pays $84.57, and a cash payer buying the generic through Cost Plus pays $40.89 plus shipping. Both are below $113.00. What Part D still buys a Medicare enrollee is progress toward the 2026 out-of-pocket cap: once your covered Part D drug spending reaches $2,100 in a calendar year you move to catastrophic coverage and pay nothing more for covered drugs. Cash purchases do not count toward that cap, and Merck’s program terms make you acknowledge in writing that your payments will not be applied to any deductible or annual out-of-pocket total.
For commercial insurance, the comparison is simpler. If your plan’s copay on Januvia is above $84.57, or above roughly $46 for the generic delivered, the cash route wins on a single fill. Weigh that against the deductible credit you give up. Our fair price checker is a fast sanity check on any quote you are handed.
One catch worth flagging: Merck’s terms require you to agree not to submit the purchase to any insurance plan for reimbursement, and to notify your commercial plan that the medicine was bought outside its prescription benefit. That is standard for direct-purchase programs, but it means you cannot use both routes on the same fill.
How to Pay Less
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Price the generic through a transparent pharmacy first. Cost Plus Drugs publishes its arithmetic on sitagliptin 100 mg: $31.21 to manufacture 30 tablets, a $4.68 markup, $5.00 of pharmacy labor, and $5.25 of shipping, landing at $40.89 plus shipping. That is the cheapest verified route on this page.
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Check TrumpRx before every refill. The federal site carries both a brand Januvia page and a generic sitagliptin page, and it shows home-delivery and nearby pickup prices side by side so you can see the eight-fold spread for yourself.
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Use the Merck Cash-Pay Gateway if you want the brand. $84.57 for a 30-day supply, dispensed and delivered by EVERSANA Pharmacy. Your prescriber sends the prescription there directly, so this is a conversation to have at the appointment.
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Apply to the Merck Patient Assistance Program if you qualify. It provides Januvia free of charge to eligible people, primarily the uninsured, with income limits of $63,840 for an individual, $86,560 for a couple, and $132,000 for a family of four as of September 2026. One application can cover up to a year, and you can reapply as many times as you need to.
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Run a discount card if you fill locally. SingleCare’s September 2026 data on brand Januvia showed a $39.17 price at CVS against a $681.99 no-card average, a spread of more than $600 on one bottle. Our comparison of GoodRx vs. SingleCare explains how to check both cards on the same fill.
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Budget for the visit, not just the pills. A free or sliding-scale clinic can handle prescribing and follow-up at little or no cost, and a routine cash-pay doctor visit typically runs $100 to $300 if you go that route instead.
Bottom Line
Budget $41 to $46 a month if you fill generic sitagliptin through a transparent mail pharmacy, and $84.57 a month if you want brand Januvia through Merck’s own cash channel. Budget $682 only if you hand a paper prescription to a counter and ask no questions, because that is what the average unhelped cash fill costs.
The most useful thing to take away is that “generic” and “cheap” have come apart on this drug. The same generic tablet was $40.89 at one pharmacy and $321.70 at another in the same week, so a price check is worth more here than brand loyalty in either direction. For the SGLT2 inhibitors most often prescribed alongside or instead of this one, see our Farxiga cost guide, where the generic is now under $10, and our Jardiance cost guide, where no generic exists yet and the cash price is still three figures. For the rest of the diabetes shelf on cash, our insulin cost guide covers the $35 programs and our GLP-1 cost guide covers the injectables.