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Unithroid is a brand of levothyroxine. 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, 4,855 of 5,492 Medicare Part D and Medicare Advantage drug plans (88.4%) list Unithroid on their formulary, across 184 of 286 formularies. The most common placement is tier 1 (2,387 plans, 49.2% of those covering it). 0 of the covering plans require prior authorization (0%), 0 step therapy and 0 a quantity limit. Generic levothyroxine is on 5,492 of 5,492 plans (100%).
2,662 covering plans charge a flat copay for a 30-day supply at a preferred retail pharmacy after the deductible — median $0, 2,402 of them $0; 2,193 charge coinsurance instead — median 20% 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: 4,920 of 5,496 plans covered it (89.5%); 2027: 4,855 of 5,492 (88.4%).
Of 4,367 plans offered in both years, 43 added it to the formulary and 86 dropped it.
Among plans covering it both years, 38 moved it to a higher tier and 33 to a lower one; 0 added prior authorization and 0 removed it.
| Tier | Plans |
|---|---|
| Tier 1 | 2,387 |
| Tier 2 | 286 |
| Tier 3 | 2,112 |
| Tier 4 | 70 |
| Plan type | Plans covering | Share | Prior auth |
|---|---|---|---|
| Stand-alone Part D (PDP) | 219 of 323 | 67.8% | 0% |
| Medicare Advantage with drugs (MA-PD) | 2,907 of 3,200 | 90.8% | 0% |
| Special needs plans (SNP) | 1,729 of 1,969 | 87.8% | 0% |
| Carrier | Plans covering | Usual tier | Prior auth |
|---|---|---|---|
| Humana | 744 of 846 | Tier 3 | 0 |
| UnitedHealthcare | 830 of 830 | Tier 3 | 0 |
| Devoted Health | 728 of 728 | Tier 1 | 0 |
| Aetna Medicare | 631 of 631 | Tier 1 | 0 |
| Wellcare | 268 of 268 | Tier 1 | 0 |
| HealthSpring | 226 of 226 | Tier 3 | 0 |
| Kaiser Permanente | 0 of 112 | No tier listed | 0 |
| SCAN Health Plan | 83 of 83 | Tier 1 | 0 |
| Highmark Blue Cross Blue Shield or Highmark Blue Shield | 12 of 80 | Tier 3 | 0 |
| Alignment Health Plan | 77 of 77 | Tier 1 | 0 |
| Anthem Blue Cross and Blue Shield | 74 of 74 | Tier 1 | 0 |
| Wellpoint | 63 of 63 | Tier 1 | 0 |
| Priority Health Medicare | 40 of 40 | Tier 2 | 0 |
| CarePlus Health Plans, Inc. | 37 of 37 | Tier 3 | 0 |
| Zing Health | 36 of 36 | Tier 2 | 0 |
| Capital Blue Cross | 35 of 35 | Tier 3 | 0 |
| Prominence Health Plan | 0 of 29 | No tier listed | 0 |
| Medica | 27 of 27 | Tier 1 | 0 |
| Anthem HealthKeepers | 26 of 26 | Tier 1 | 0 |
| Blue Cross Blue Shield of Michigan | 26 of 26 | Tier 3 | 0 |
| State | Plans covering | Share |
|---|---|---|
| Alabama | 108 of 114 | 94.7% |
| Alaska | 6 of 9 | 66.7% |
| American Samoa | 1 of 1 | 100% |
| Arizona | 134 of 147 | 91.2% |
| Arkansas | 80 of 85 | 94.1% |
| California | 296 of 397 | 74.6% |
| Colorado | 82 of 106 | 77.4% |
| Connecticut | 51 of 54 | 94.4% |
| Delaware | 37 of 43 | 86% |
| District of Columbia | 9 of 12 | 75% |
| Florida | 513 of 545 | 94.1% |
| Georgia | 133 of 149 | 89.3% |
| Guam | 1 of 1 | 100% |
| Hawaii | 41 of 50 | 82% |
| Idaho | 41 of 45 | 91.1% |
| Illinois | 128 of 132 | 97% |
| Indiana | 130 of 138 | 94.2% |
| Iowa | 57 of 64 | 89.1% |
| Kansas | 79 of 84 | 94% |
| Kentucky | 115 of 121 | 95% |
| Louisiana | 119 of 125 | 95.2% |
| Maine | 49 of 52 | 94.2% |
| Maryland | 34 of 49 | 69.4% |
| Massachusetts | 86 of 89 | 96.6% |
| Michigan | 173 of 182 | 95.1% |
| Minnesota | 53 of 63 | 84.1% |
| Mississippi | 100 of 104 | 96.2% |
| Missouri | 160 of 170 | 94.1% |
| Montana | 24 of 27 | 88.9% |
| Nebraska | 47 of 51 | 92.2% |
| Nevada | 75 of 100 | 75% |
| New Hampshire | 22 of 25 | 88% |
| New Jersey | 68 of 73 | 93.2% |
| New Mexico | 65 of 68 | 95.6% |
| New York | 183 of 215 | 85.1% |
| North Carolina | 161 of 176 | 91.5% |
| North Dakota | 23 of 26 | 88.5% |
| Northern Mariana Islands | 1 of 1 | 100% |
| Ohio | 156 of 171 | 91.2% |
| Oklahoma | 66 of 81 | 81.5% |
| Oregon | 69 of 92 | 75% |
| Pennsylvania | 257 of 323 | 79.6% |
| Puerto Rico | 27 of 64 | 42.2% |
| Rhode Island | 26 of 29 | 89.7% |
| South Carolina | 83 of 89 | 93.3% |
| South Dakota | 27 of 30 | 90% |
| Tennessee | 148 of 156 | 94.9% |
| Texas | 367 of 407 | 90.2% |
| U.S. Virgin Islands | 1 of 1 | 100% |
| Utah | 46 of 53 | 86.8% |
| Vermont | 11 of 14 | 78.6% |
| Virginia | 133 of 144 | 92.4% |
| Washington | 91 of 114 | 79.8% |
| West Virginia | 52 of 69 | 75.4% |
| Wisconsin | 86 of 96 | 89.6% |
| Wyoming | 10 of 13 | 76.9% |
Medicare Part D paid for 240,780 30-day fills of Unithroid in 2024 for about 26,294 enrollees, at an average total cost of $15.98 per 30-day fill (CMS Part D Prescribers by Geography and Drug, national).
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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.