Medicare drug coverage

Wegovy in Montana: 2027 Part D coverage

27 of 27 Part D plans offered in Montana (100%) list Wegovy on their 2027 formulary. 100% of those require prior authorization, step therapy, or a quantity limit.

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Montana compared with the nation

100% of the 27 Part D plans offered in Montana leave Wegovy off the 2027 formulary or restrict it, against 100% nationally (the same). Montana ranks 27 of 51 from most to least restrictive. A plan offered in several states counts in each.

Wegovy 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

Wegovy Part D coverage, 2026 and 2027
Measure20262027Change
Part D plans in the file3627-9
Plans that list it0 (0%)27 (100%)+100 points
Prior authorization (of plans that list it)027 (100%)+100 points
Step therapy (of plans that list it)00 (0%)no change
Quantity limit (of plans that list it)027 (100%)+100 points
Any of the three (of plans that list it)027 (100%)+100 points
Not listed or restricted (of all plans)36 (100%)27 (100%)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

Wegovy formulary tier, 2026 and 2027
Tier2026 plans2027 plans
Tier 202 (7%)
Tier 3025 (93%)

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

Wegovy: plans in both 2026 and 2027
Plan by planPlans
Same plan id in both years24
Listed it in 2026, not in 20270 (0%)
Listed it in 2027, not in 202624 (100%)
Moved it to a higher tier0 (0%)
Added prior authorization0 (0%)
Added step therapy0 (0%)
Added a quantity limit0 (0%)
Added at least one of the three0 (0%)
Removed at least one of the three0 (0%)
Plan ids new in 20273
2026 plan ids not in the 2027 file12

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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Wegovy 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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