Medicare drug coverage
Gammaked: 2027 Medicare Part D coverage
1,343 of 5,495 Part D plans (24%) list Gammaked on their 2027 formulary, the plan's list of covered drugs (down 10 points from 2026). 92% of those require prior authorization, step therapy, or a quantity limit. Plan counts include both Medicare Advantage plans with drug coverage (5,172 MA-PD) and stand-alone drug plans (323 PDP).
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2027 compared with 2026
Gammaked is number 150 by total Medicare Part D spending in 2024 ($270 million). Plans that list it most often put it on tier 5 (a tier is the cost level a plan puts a drug on; a lower tier usually costs less). Counts use 6 RxNorm products for this name.
| Measure | 2026 | 2027 | Change |
|---|---|---|---|
| Part D plans in the file | 5,518 | 5,495 | -23 |
| Plans that list it | 1,873 (34%) | 1,343 (24%) | -10 points |
| Prior authorization (of plans that list it) | 1,758 (94%) | 1,231 (92%) | -2 points |
| Step therapy (of plans that list it) | 0 (0%) | 0 (0%) | no change |
| Quantity limit (of plans that list it) | 0 (0%) | 0 (0%) | no change |
| Any of the three (of plans that list it) | 1,758 (94%) | 1,231 (92%) | -2 points |
| Not listed or restricted (of all plans) | 5,403 (98%) | 5,383 (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
Every 2027 stand-alone drug plan
Each stand-alone Part D plan (PDP) with Gammaked's 2027 tier and limits. CMS files a PDP once per region, so one plan name can have several plan IDs; the row shows the tier and limits most of them use. Medicare Advantage drug plans are local: pick a state for its plan-by-plan table.
| Plan (PDP) | Plan IDs | 2027 tier | 2027 limits |
|---|---|---|---|
| AARP Medicare Rx Preferred from UHC (PDP) | 39 | Not listed | Not listed |
| AARP Medicare Rx Saver from UHC (PDP) | 34 | Not listed | Not listed |
| Blue Medicare Rx Enhanced (PDP) | 1 | Not listed | Not listed |
| Blue Medicare Rx Standard (PDP) | 1 | Not listed | Not listed |
| Blue MedicareRx Essentials (PDP) | 1 | Not listed | Not listed |
| Blue MedicareRx Plus (PDP) | 1 | Not listed | Not listed |
| Blue MedicareRx Premier (PDP) | 1 | Tier 5 | PA |
| Blue MedicareRx Value (PDP) | 1 | Not listed | Not listed |
| Blue MedicareRx Value Plus (PDP) | 1 | Tier 5 | PA |
| Blue Shield Rx Enhanced (PDP) | 1 | Not listed | Not listed |
| Blue Shield Rx Plus (PDP) | 1 | Not listed | Not listed |
| BlueMedicare Complete Rx (PDP) | 1 | Not listed | Not listed |
| BlueMedicare Premier Rx (PDP) | 2 | Tier 5 | PA (1 of 2 IDs) |
| BlueMedicare Value Rx (PDP) | 1 | Tier 5 | PA |
| BlueRx Enhanced Plus (PDP) | 1 | Not listed | Not listed |
| BlueRx Essential (PDP) | 1 | Not listed | Not listed |
| HealthSpring Assurance Rx (PDP) | 35 | Not listed | Not listed |
| HealthSpring Extra Rx (PDP) | 2 | Not listed | Not listed |
| HealthSpring Extra RX (PDP) | 3 | Not listed | Not listed |
| Horizon Medicare Blue Rx Enhanced (PDP) | 1 | Not listed | Not listed |
| Horizon Medicare Blue Rx Standard (PDP) | 1 | Not listed | Not listed |
| Humana Basic Rx Plan (PDP) | 34 | Not listed | Not listed |
| Humana Premier Rx Plan (PDP) | 34 | Not listed | Not listed |
| Humana Value Rx Plan (PDP) | 34 | Not listed | Not listed |
| MedicareBlue Rx Standard (PDP) | 1 | Not listed | Not listed |
| Prescription Blue Premium (PDP) | 1 | Not listed | Not listed |
| Prescription Blue Select (PDP) | 1 | Not listed | Not listed |
| SilverScript Choice (PDP) | 20 | Not listed | Not listed |
| Wellcare Classic (PDP) | 34 | Not listed | Not listed |
| Wellcare Value Script (PDP) | 34 | Not listed | Not listed |
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
Formulary tier
| Tier | 2026 plans | 2027 plans |
|---|---|---|
| Tier 1 | 30 (2%) | 18 (1%) |
| Tier 2 | 1 (<1%) | 0 (0%) |
| Tier 4 | 3 (<1%) | 0 (0%) |
| Tier 5 | 1,819 (97%) | 1,325 (99%) |
| Tier 6 | 20 (1%) | 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
4,380 plan IDs are in both files. 0 of them (0%) added prior authorization, step therapy, or a quantity limit for Gammaked, and 567 stopped listing it.
| Plan by plan | Plans |
|---|---|
| Same plan ID in both years | 4,380 |
| Listed it in 2026, not in 2027 | 567 (13%) |
| Listed it in 2027, not in 2026 | 12 (<1%) |
| Moved it to a higher tier | 7 (<1%) |
| Added prior authorization | 0 (0%) |
| Added step therapy | 0 (0%) |
| Added a quantity limit | 0 (0%) |
| Added at least one of the three | 0 (0%) |
| Removed at least one of the three | 0 (0%) |
| Plan IDs new in 2027 | 1,115 |
| 2026 plan IDs not in the 2027 file | 1,138 |
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
States from most to least restrictive
Share of 2027 Part D plans offered in each state that leave Gammaked off the formulary or list it with prior authorization, step therapy, or a quantity limit. 41 states tie for the highest share, 100%; Maryland ranks last at 80%. States at the same share are ordered by the prior authorization or step therapy share; states equal on both shares share a rank, marked Tied.
| Rank | State | 2027 plans | Not listed or restricted | Prior auth or step therapy | Change from 2026 |
|---|---|---|---|---|---|
| 1 | Tennessee | 157 | 100% | 53% | no change |
| 2 | Alabama | 115 | 100% | 50% | no change |
| 3 | New York | 215 | 100% | 33% | no change |
| Tied 4 | Arizona | 148 | 100% | 29% | no change |
| Tied 4 | Illinois | 133 | 100% | 29% | no change |
| 6 | Pennsylvania | 324 | 100% | 28% | no change |
| Tied 7 | North Carolina | 177 | 100% | 27% | no change |
| Tied 7 | Arkansas | 86 | 100% | 27% | no change |
| Tied 7 | Ohio | 173 | 100% | 27% | no change |
| Tied 10 | Connecticut | 54 | 100% | 26% | no change |
| Tied 10 | Mississippi | 105 | 100% | 26% | no change |
| 12 | Florida | 549 | 100% | 25% | no change |
| 13 | New Hampshire | 25 | 100% | 24% | no change |
| 14 | Indiana | 140 | 100% | 23% | no change |
| Tied 15 | South Carolina | 91 | 100% | 22% | no change |
| Tied 15 | Texas | 412 | 100% | 22% | no change |
| Tied 17 | Missouri | 171 | 100% | 21% | no change |
| Tied 17 | Utah | 53 | 100% | 21% | no change |
| Tied 17 | Massachusetts | 92 | 100% | 21% | no change |
| 20 | Nebraska | 51 | 100% | 20% | no change |
| Tied 21 | New Mexico | 68 | 100% | 19% | no change |
| Tied 21 | Delaware | 43 | 100% | 19% | no change |
| Tied 21 | Oklahoma | 81 | 100% | 19% | no change |
| 24 | Louisiana | 126 | 100% | 18% | no change |
| 25 | Iowa | 64 | 100% | 17% | no change |
| Tied 26 | Maine | 52 | 100% | 15% | no change |
| Tied 26 | Michigan | 183 | 100% | 15% | no change |
| Tied 28 | Vermont | 14 | 100% | 14% | no change |
| Tied 28 | Rhode Island | 29 | 100% | 14% | no change |
| Tied 28 | New Jersey | 74 | 100% | 14% | no change |
| Tied 31 | Kansas | 84 | 100% | 13% | no change |
| Tied 31 | Kentucky | 123 | 100% | 13% | no change |
| 33 | Idaho | 45 | 100% | 7% | no change |
| 34 | Wisconsin | 97 | 100% | 4% | no change |
| 35 | Minnesota | 63 | 100% | 2% | no change |
| Tied 36 | Alaska | 9 | 100% | 0% | no change |
| Tied 36 | Montana | 27 | 100% | 0% | no change |
| Tied 36 | North Dakota | 26 | 100% | 0% | no change |
| Tied 36 | South Dakota | 30 | 100% | 0% | no change |
| Tied 36 | West Virginia | 70 | 100% | 0% | no change |
| Tied 36 | Wyoming | 13 | 100% | 0% | no change |
| 42 | Nevada | 100 | 97% | 5% | -3 points |
| 43 | Oregon | 92 | 96% | 30% | no change |
| 44 | Virginia | 145 | 96% | 14% | no change |
| 45 | Georgia | 151 | 95% | 25% | no change |
| 46 | Colorado | 106 | 90% | 30% | +3 points |
| 47 | Hawaii | 50 | 88% | 48% | no change |
| 48 | California | 397 | 88% | 3% | no change |
| 49 | Washington | 114 | 86% | 23% | +1 point |
| 50 | District of Columbia | 21 | 86% | 5% | -2 points |
| 51 | Maryland | 49 | 80% | 41% | -4 points |
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
By parent organization
164 parent organizations offer 2027 Part D plans. Humana Inc. has the most, 884, and 100% of them leave Gammaked off or restrict it.
| Parent organization | 2027 plans ↑ | List it | Restrict it (of listing) | Not listed or restricted | Change from 2026 | Plans that added a restriction |
|---|---|---|---|---|---|---|
| AIDS Healthcare Foundation | 1 | 0% | none list it | 100% | no change | 0 |
| Alameda Alliance for Health | 1 | 0% | none list it | 100% | no change | 0 |
| AllCare Health, Inc. | 1 | 0% | none list it | 100% | no change | 0 |
| AlohaCare | 1 | 0% | none list it | 100% | no change | 0 |
| BCBS MN, MT, NE, ND, WY, Wellmark IA and SD | 1 | 0% | none list it | 100% | no change | 0 |
| CareOregon, Inc. | 1 | 100% | 100% | 100% | no change | 0 |
| Contra Costa Health Services | 1 | 0% | none list it | 100% | no change | 0 |
| DLP Marquette Health Plan, LLC | 1 | 0% | none list it | 100% | no change | 0 |
| Health Plan of San Mateo | 1 | 0% | none list it | 100% | no change | 0 |
| IMPERIAL COUNTY LOCAL HEALTH AUTHORITY | 1 | 0% | none list it | 100% | no change | 0 |
| INLAND EMPIRE HEALTH PLAN | 1 | 0% | none list it | 100% | no change | 0 |
| Itasca County | 1 | 100% | 100% | 100% | no change | 0 |
| Kern Health Systems (KHS) | 1 | 0% | none list it | 100% | no change | 0 |
| Local Initiative Health Authority for LA County | 1 | 0% | none list it | 100% | no change | 0 |
| Muscogee Creek Nation | 1 | 0% | none list it | 100% | new in 2027 | 0 |
| Orange County Health Authority | 1 | 0% | none list it | 100% | no change | 0 |
| SAN FRANCISCO HEALTH AUTHORITY | 1 | 0% | none list it | 100% | no change | 0 |
| SAN JOAQUIN COUNTY HEALTH COMMISSION | 1 | 0% | none list it | 100% | no change | 0 |
| SANTA BARBARA SAN LUIS OBISPO REGIONAL HEALTH AUTH | 1 | 0% | none list it | 100% | no change | 0 |
| SANTA CLARA COUNTY HEALTH AUTHORITY | 1 | 0% | none list it | 100% | no change | 0 |
| SANTA CRUZ MONTEREY MERCED SAN BENITO MARIPOSA MAN | 1 | 0% | none list it | 100% | no change | 0 |
| Samaritan Health Services, Inc. | 1 | 0% | none list it | 100% | no change | 0 |
| The Schroer Group, Inc. | 1 | 0% | none list it | 100% | no change | 0 |
| Ventura County Medi-Cal Managed Care Commission | 1 | 0% | none list it | 100% | no change | 0 |
| BayCare Health System, Inc. | 2 | 100% | 100% | 100% | no change | 0 |
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
Near it by Part D spending
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