Medicare drug coverage

Janumet in Indiana: 2027 Part D coverage

140 of 140 Part D plans offered in Indiana (100%) list Janumet on their 2027 formulary, up 3 points from 2026. 98% of those require prior authorization, step therapy, or a quantity limit.

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Indiana compared with the nation

98% of the 140 Part D plans offered in Indiana leave Janumet off the 2027 formulary or restrict it, against 95% nationally (3 points higher). Indiana ranks 27 of 51 from most to least restrictive. A plan offered in several states counts in each.

Janumet in every state and by parent organization

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

2027 compared with 2026

Janumet Part D coverage, 2026 and 2027
Measure20262027Change
Part D plans in the file128140+12
Plans that list it124 (97%)140 (100%)+3 points
Prior authorization (of plans that list it)0 (0%)31 (22%)+22 points
Step therapy (of plans that list it)0 (0%)0 (0%)no change
Quantity limit (of plans that list it)121 (98%)137 (98%)no change
Any of the three (of plans that list it)121 (98%)137 (98%)no change
Not listed or restricted (of all plans)125 (98%)137 (98%)no change

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

Formulary tier

Janumet formulary tier, 2026 and 2027
Tier2026 plans2027 plans
Tier 15 (4%)5 (4%)
Tier 20 (0%)5 (4%)
Tier 3115 (93%)130 (93%)
Tier 64 (3%)0 (0%)

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

Plan by plan, 2026 to 2027

Janumet: plans in both 2026 and 2027
Plan by planPlans
Same plan id in both years112
Listed it in 2026, not in 20270 (0%)
Listed it in 2027, not in 20264 (4%)
Moved it to a higher tier0 (0%)
Added prior authorization20 (18%)
Added step therapy0 (0%)
Added a quantity limit0 (0%)
Added at least one of the three20 (18%)
Removed at least one of the three0 (0%)
Plan ids new in 202728
2026 plan ids not in the 2027 file18

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS 2026 Part D formulary file (basic drugs and plan information), as of September 30, 2026. Publisher page

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Janumet in other states

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

About this data

A plan here is one Part D plan as the CMS formulary files list it: contract, plan, and segment. That covers Medicare Advantage plans with drug coverage and stand-alone drug plans. A plan lists a drug when its formulary has a row for any RxNorm product of that name. When it has several, the row with the lowest tier is the one counted, and restricted means that row has prior authorization, step therapy, or a quantity limit.

A plan with no row for the drug counts as not listing it. That can be a product the file codes another way, so read a low count as a lookup result, not a coverage decision. A state counts every plan the CMS landscape file offers there. Parent organizations are named as CMS names them. The drug list is the top 200 by total Part D spending.

Source: CMS 2027 Part D formulary file (basic drugs and plan information), as of October 8, 2026. Publisher page

Source: CMS CY2027 landscape file (states and parent organizations), as of September 30, 2026. Publisher page

Source: CMS Medicare Part D Spending by Drug, 2024 data, as of June 25, 2026. Publisher page

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