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Mirabegron is the generic ingredient; brand versions: Myrbetriq. What agents check before quoting it: how many 2027 Part D plans cover it, on which tier, with what restrictions and copays, by plan type, carrier and state.
In 2027, 4,944 of 5,492 Medicare Part D and Medicare Advantage drug plans (90%) list Mirabegron on their formulary, across 239 of 286 formularies. The most common placement is tier 3 (3,805 plans, 77% of those covering it). 0 of the covering plans require prior authorization (0%), 26 step therapy and 3,398 a quantity limit.
1,026 covering plans charge a flat copay for a 30-day supply at a preferred retail pharmacy after the deductible — median $5, 421 of them $0; 3,918 charge coinsurance instead — median 21% of the drug's cost. Once a member's out-of-pocket drug spending reaches $2,400 in 2027, covered drugs cost $0 for the rest of the year.
2026: 5,456 of 5,496 plans covered it (99.3%); 2027: 4,944 of 5,492 (90%).
Of 4,367 plans offered in both years, 0 added it to the formulary and 253 dropped it.
Among plans covering it both years, 65 moved it to a higher tier and 554 to a lower one; 0 added prior authorization and 0 removed it.
| Tier | Plans |
|---|---|
| Tier 1 | 111 |
| Tier 2 | 858 |
| Tier 3 | 3,805 |
| Tier 4 | 170 |
| Plan type | Plans covering | Share | Prior auth |
|---|---|---|---|
| Stand-alone Part D (PDP) | 285 of 323 | 88.2% | 0% |
| Medicare Advantage with drugs (MA-PD) | 2,885 of 3,200 | 90.2% | 0% |
| Special needs plans (SNP) | 1,774 of 1,969 | 90.1% | 0% |
| Carrier | Plans covering | Usual tier | Prior auth |
|---|---|---|---|
| Humana | 846 of 846 | Tier 3 | 0 |
| UnitedHealthcare | 796 of 830 | Tier 3 | 0 |
| Devoted Health | 414 of 728 | Tier 2 | 0 |
| Aetna Medicare | 631 of 631 | Tier 3 | 0 |
| Wellcare | 268 of 268 | Tier 2 | 0 |
| HealthSpring | 226 of 226 | Tier 3 | 0 |
| Kaiser Permanente | 112 of 112 | Tier 4 | 0 |
| SCAN Health Plan | 83 of 83 | Tier 3 | 0 |
| Highmark Blue Cross Blue Shield or Highmark Blue Shield | 80 of 80 | Tier 3 | 0 |
| Alignment Health Plan | 77 of 77 | Tier 3 | 0 |
| Anthem Blue Cross and Blue Shield | 74 of 74 | Tier 3 | 0 |
| Wellpoint | 63 of 63 | Tier 3 | 0 |
| Priority Health Medicare | 40 of 40 | Tier 3 | 0 |
| CarePlus Health Plans, Inc. | 37 of 37 | Tier 3 | 0 |
| Zing Health | 0 of 36 | No tier listed | 0 |
| Capital Blue Cross | 35 of 35 | Tier 3 | 0 |
| Prominence Health Plan | 29 of 29 | Tier 3 | 0 |
| Medica | 27 of 27 | Tier 3 | 0 |
| Anthem HealthKeepers | 26 of 26 | Tier 3 | 0 |
| Blue Cross Blue Shield of Michigan | 26 of 26 | Tier 3 | 0 |
| State | Plans covering | Share |
|---|---|---|
| Alabama | 99 of 114 | 86.8% |
| Alaska | 8 of 9 | 88.9% |
| American Samoa | 1 of 1 | 100% |
| Arizona | 131 of 147 | 89.1% |
| Arkansas | 75 of 85 | 88.2% |
| California | 386 of 397 | 97.2% |
| Colorado | 97 of 106 | 91.5% |
| Connecticut | 45 of 54 | 83.3% |
| Delaware | 39 of 43 | 90.7% |
| District of Columbia | 11 of 12 | 91.7% |
| Florida | 491 of 545 | 90.1% |
| Georgia | 141 of 149 | 94.6% |
| Guam | 1 of 1 | 100% |
| Hawaii | 36 of 50 | 72% |
| Idaho | 33 of 45 | 73.3% |
| Illinois | 111 of 132 | 84.1% |
| Indiana | 115 of 138 | 83.3% |
| Iowa | 54 of 64 | 84.4% |
| Kansas | 77 of 84 | 91.7% |
| Kentucky | 111 of 121 | 91.7% |
| Louisiana | 115 of 125 | 92% |
| Maine | 43 of 52 | 82.7% |
| Maryland | 31 of 49 | 63.3% |
| Massachusetts | 74 of 89 | 83.1% |
| Michigan | 160 of 182 | 87.9% |
| Minnesota | 61 of 63 | 96.8% |
| Mississippi | 93 of 104 | 89.4% |
| Missouri | 155 of 170 | 91.2% |
| Montana | 24 of 27 | 88.9% |
| Nebraska | 45 of 51 | 88.2% |
| Nevada | 99 of 100 | 99% |
| New Hampshire | 21 of 25 | 84% |
| New Jersey | 70 of 73 | 95.9% |
| New Mexico | 60 of 68 | 88.2% |
| New York | 175 of 215 | 81.4% |
| North Carolina | 159 of 176 | 90.3% |
| North Dakota | 25 of 26 | 96.2% |
| Northern Mariana Islands | 1 of 1 | 100% |
| Ohio | 146 of 171 | 85.4% |
| Oklahoma | 74 of 81 | 91.4% |
| Oregon | 75 of 92 | 81.5% |
| Pennsylvania | 307 of 323 | 95% |
| Puerto Rico | 64 of 64 | 100% |
| Rhode Island | 24 of 29 | 82.8% |
| South Carolina | 83 of 89 | 93.3% |
| South Dakota | 29 of 30 | 96.7% |
| Tennessee | 138 of 156 | 88.5% |
| Texas | 381 of 407 | 93.6% |
| U.S. Virgin Islands | 1 of 1 | 100% |
| Utah | 48 of 53 | 90.6% |
| Vermont | 11 of 14 | 78.6% |
| Virginia | 133 of 144 | 92.4% |
| Washington | 101 of 114 | 88.6% |
| West Virginia | 68 of 69 | 98.6% |
| Wisconsin | 91 of 96 | 94.8% |
| Wyoming | 12 of 13 | 92.3% |
Medicare Part D paid for 455,185 30-day fills of Mirabegron in 2024 for about 118,635 enrollees, at an average total cost of $294.61 per 30-day fill (CMS Part D Prescribers by Geography and Drug, national).
Price Mirabegron and the rest of a client's list on every plan in their county.
Estimate Mirabegron costs by plan
Free tools for licensed insurance agents. Data from CMS public files; verify with plan documents before advising a client.
Counts are over every Medicare Advantage drug plan and stand-alone Part D plan in the CMS monthly formulary files, excluding employer plans. A plan counts as covering a drug when any strength or form of it is on the plan’s formulary; the tier, prior authorization, step therapy and quantity limit shown are the most favorable version on that formulary. Copays are for a 30-day supply at a preferred retail pharmacy after the deductible. This is a reference for licensed agents, not a plan recommendation; verify with the plan’s formulary before advising a client. Source: CMS Part D formulary files (release 10/08/2026). CMS formulary data.