Januvia (sitagliptin) is a prescription tablet that helps lower blood sugar in adults with type 2 diabetes, according to its FDA label on DailyMed. It is one of the first 10 drugs with a Medicare negotiated price, and the CMS negotiated price file sets that price at $116.06 for a 30-day supply starting January 1, 2027, after the yearly inflation adjustment. The CMS Drug Price Negotiation Program page does not list Januvia among deselected drugs.
How it works. The negotiated price is what your Part D plan pays for Januvia, before pharmacy dispensing fees. Your share is figured from that price. Under the 2027 standard benefit in the CMS CY2027 Rate Announcement, you pay 100% until you have paid the $700 deductible, then 25%, and nothing more for covered drugs once you reach $2,400 out of pocket in 2027.
What it costs in 2027. On the standard benefit, a monthly Januvia fill costs $116.06 for the first 6 months, about $32 in month 7 when the deductible is met, then about $29 a month (25% of $116.06). That adds up to about $873 for the year. Your real number can be lower or higher: Idaho's 8 standalone Part D plans for 2027 have deductibles from $300 to $700 and premiums from $5.30 to $238 a month, per the CMS CY2027 Landscape file, and many plans charge a flat brand copay instead of 25%. Some 2027 formularies also list another sitagliptin product, so the version and tier your plan covers matter. With Extra Help, a brand-name drug costs no more than $14.40 per prescription in 2027.
What to do next. Open enrollment ends December 7, 2026. Send us your drug list with doses and your pharmacy, and we price Januvia and your other prescriptions against the 2027 plans we represent, Medicare Advantage included. Call or text 208-350-9933. Our help costs you nothing, and we leave medication choices to you and your doctor.
| Medicare negotiated price, 30-day supply, 2027 | $116.06 |
| Standard Part D deductible, 2027 | $700 |
| Your share after the deductible (standard benefit) | 25%, about $29.02 a month |
| Out-of-pocket cap on covered drugs, 2027 | $2,400 |
| Worked example: 12 monthly fills on the standard benefit | About $873 for 2027 |
| Extra Help maximum copay, brand-name drug, 2027 | $14.40 |
| Standalone Part D plans in Idaho, 2027 | 8, premiums $5.30 to $238 a month |
Related on this site: Medicare Part D in Idaho for 2027 · Medicare Part D plans
Sources
- CMS, Selected Drug List and Maximum Fair Price data file (ZIP, file dated September 21, 2026) · accessed October 30, 2026
- CMS, Medicare Drug Price Negotiation Program: selected drugs and negotiated prices (page last modified September 22, 2026) · accessed October 30, 2026
- CMS, CY2027 Medicare Advantage and Part D Rate Announcement (Part D deductible, 25% cost sharing, out-of-pocket threshold, Extra Help copays) · accessed October 30, 2026
- CMS CY2027 Medicare Advantage and Part D Landscape file (202610), Idaho standalone Part D plans · accessed October 30, 2026
- DailyMed (National Library of Medicine), Januvia FDA label · accessed October 30, 2026
This page is general information, not advice about your specific situation, and it is not connected with or endorsed by the U.S. government or the federal Medicare program. Rules and figures change, so confirm current requirements with CMS, Social Security, or a licensed agent before you act. We do not offer every plan available in your area. Currently we represent 5 organizations which offer 300 products in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.