Medicare Part D Drug Coverage List

According to the Centers for Medicare & Medicaid Services (CMS) 2026 Part D formulary data, this list covers 6,046 drugs across Medicare Part D plans, sorted by how broadly each is covered. Under the Inflation Reduction Act, Part D out-of-pocket costs are capped at $2,000 a year in 2026; see our methodology for how coverage breadth is calculated.

Coverage varies by plan and geography. Verify drug coverage with your specific plan before making decisions.

Overview Browse Drugs Part D Plans Rankings

Drug Name	Plans Covering	Coverage %	Avg Tier	PA %	2023 Benes
doravirine 100 MG Oral Tablet [Pifeltro] doravirine	5,067	100%	T4	0%	4,371
doravirine 100 MG / lamivudine 300 MG / tenofovir disoproxil fumarate 300 MG Oral Tablet [Delstrigo] doravirine	5,067	100%	T4	0%	4,371
cannabidiol 100 MG/ML Oral Solution [Epidiolex] cannabidiol	5,067	100%	T4	99.1%	4,236
iloperidone 1 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 2 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 4 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 6 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 8 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 10 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
iloperidone 12 MG Oral Tablet [Fanapt] iloperidone	5,067	100%	T4	60.6%	4,164
{2 (iloperidone 1 MG Oral Tablet [Fanapt]) / 2 (iloperidone 2 MG Oral Tablet [Fanapt]) / 2 (iloperidone 4 MG Oral Tablet [Fanapt]) / 2 (iloperidone 6 MG Oral Tablet [Fanapt]) } Pack [Fanapt Titration Pack] iloperidone	5,067	100%	T3	60.6%	4,164
lamivudine 10 MG/ML Oral Solution lamivudine	5,067	100%	T2	0%	4,096
lamivudine 150 MG / zidovudine 300 MG Oral Tablet lamivudine	5,067	100%	T3	0%	4,096
lamivudine 300 MG / tenofovir disoproxil fumarate 300 MG Oral Tablet [Cimduo] lamivudine	5,067	100%	T4	0%	4,096
lamivudine 150 MG Oral Tablet lamivudine	5,067	100%	T2	0%	4,096
lamivudine 100 MG Oral Tablet lamivudine	5,067	100%	T2	0.3%	4,096
lamivudine 300 MG Oral Tablet lamivudine	5,067	100%	T2	0%	4,096
ceftriaxone 250 MG Injection ceftriaxone	5,067	100%	T3	0%	3,930
ceftriaxone 500 MG Injection ceftriaxone	5,067	100%	T3	0%	3,930
ampicillin 2000 MG / sulbactam 1000 MG Injection ampicillin	5,067	100%	T3	7.9%	3,864
ampicillin 500 MG Oral Capsule ampicillin	5,067	100%	T2	0%	3,864
podofilox 5 MG/ML Topical Solution podofilox	5,067	100%	T3	0%	3,737
thioridazine 10 MG Oral Tablet thioridazine	5,067	100%	T2	17.3%	3,595
thioridazine 25 MG Oral Tablet thioridazine	5,067	100%	T2	17.3%	3,595
thioridazine 50 MG Oral Tablet thioridazine	5,067	100%	T2	17.3%	3,595
thioridazine 100 MG Oral Tablet thioridazine	5,067	100%	T2	17.3%	3,595
isavuconazonium sulfate 186 MG Oral Capsule [Cresemba] isavuconazonium sulfate	5,067	100%	T4	91.8%	3,570
lotilaner 2.5 MG/ML Ophthalmic Solution [Xdemvy] lotilaner	5,067	100%	T4	87.6%	3,568
tetrabenazine 12.5 MG Oral Tablet tetrabenazine	5,067	100%	T3	87.6%	3,523
tetrabenazine 25 MG Oral Tablet tetrabenazine	5,067	100%	T4	87.6%	3,523
0.5 ML meningococcal group B vaccine 0.1 MG/ML / Neisseria meningitidis serogroup B recombinant FHBP fusion protein antigen 0.1 MG/ML / Neisseria meningitidis serogroup B recombinant NHBA fusion protein antigen 0.1 MG/ML / Neisseria meningitidis serogroup B strain NZ98/254 outer membrane vesicle 0.05 MG/ML Prefilled Syringe [Bexsero] meningococcal group B vaccine	5,067	100%	T2	1.8%	3,444
ixazomib 2.3 MG Oral Capsule [Ninlaro] ixazomib	5,067	100%	T4	99.4%	3,384
ixazomib 3 MG Oral Capsule [Ninlaro] ixazomib	5,067	100%	T4	99.4%	3,384
ixazomib 4 MG Oral Capsule [Ninlaro] ixazomib	5,067	100%	T4	99.4%	3,384
dihydroergotamine mesylate 0.5 MG/ACTUAT Metered Dose Nasal Spray dihydroergotamine mesylate	5,067	100%	T4	62.7%	3,239
tipiracil 8.19 MG / trifluridine 20 MG Oral Tablet [Lonsurf] tipiracil	5,067	100%	T4	99.1%	3,222
tipiracil 6.14 MG / trifluridine 15 MG Oral Tablet [Lonsurf] tipiracil	5,067	100%	T4	99.1%	3,222
thiothixene 1 MG Oral Capsule thiothixene	5,067	100%	T3	13.3%	3,213
thiothixene 2 MG Oral Capsule thiothixene	5,067	100%	T3	13.3%	3,213
thiothixene 5 MG Oral Capsule thiothixene	5,067	100%	T3	13.3%	3,213
thiothixene 10 MG Oral Capsule thiothixene	5,067	100%	T3	13.3%	3,213
0.5 ML hepatitis B surface antigen vaccine 0.04 MG/ML Prefilled Syringe [Heplisav-B] hepatitis B surface antigen vaccine	5,067	100%	T2	100%	3,197
0.25 ML paliperidone palmitate 156 MG/ML Prefilled Syringe [Invega] paliperidone palmitate	5,067	100%	T3	10.6%	2,964
0.5 ML paliperidone palmitate 156 MG/ML Prefilled Syringe [Invega] paliperidone palmitate	5,067	100%	T4	10.6%	2,964
0.75 ML paliperidone palmitate 156 MG/ML Prefilled Syringe [Invega] paliperidone palmitate	5,067	100%	T4	10.6%	2,964
1 ML paliperidone palmitate 156 MG/ML Prefilled Syringe [Invega] paliperidone palmitate	5,067	100%	T4	10.6%	2,964
1.5 ML paliperidone palmitate 156 MG/ML Prefilled Syringe [Invega] paliperidone palmitate	5,067	100%	T4	10.6%	2,964
flucytosine 500 MG Oral Capsule flucytosine	5,067	100%	T4	39.7%	2,899
abacavir 300 MG Oral Tablet abacavir	5,067	100%	T3	0%	2,809
abacavir 600 MG / dolutegravir 50 MG / lamivudine 300 MG Oral Tablet [Triumeq] abacavir	5,067	100%	T4	0%	2,809
abacavir 60 MG / dolutegravir 5 MG / lamivudine 30 MG Tablet for Oral Suspension [Triumeq] abacavir	5,067	100%	T3	0%	2,809
abacavir 20 MG/ML Oral Solution abacavir	5,067	100%	T3	0%	2,809
abacavir 600 MG / lamivudine 300 MG Oral Tablet abacavir	5,067	100%	T3	0%	2,809
amikacin liposomal 70.3 MG/ML Inhalation Suspension [Arikayce] amikacin liposomal	5,067	100%	T4	95.2%	2,801
felbamate 120 MG/ML Oral Suspension felbamate	5,067	100%	T3	2.4%	2,759
felbamate 400 MG Oral Tablet felbamate	5,067	100%	T3	2.1%	2,759
felbamate 600 MG Oral Tablet felbamate	5,067	100%	T3	2.1%	2,759
etravirine 25 MG Oral Tablet [Intelence] etravirine	5,067	100%	T3	0%	2,742
etravirine 100 MG Oral Tablet etravirine	5,067	100%	T4	0%	2,742
etravirine 200 MG Oral Tablet etravirine	5,067	100%	T4	0%	2,742
nitazoxanide 500 MG Oral Tablet nitazoxanide	5,067	100%	T4	10.9%	2,613
acalabrutinib 100 MG Oral Tablet [Calquence] acalabrutinib	5,067	100%	T4	99.1%	2,590
tiagabine hydrochloride 12 MG Oral Tablet tiagabine hydrochloride	5,067	100%	T3	0%	2,484
tiagabine hydrochloride 16 MG Oral Tablet tiagabine hydrochloride	5,067	100%	T3	0%	2,484
tiagabine hydrochloride 2 MG Oral Tablet tiagabine hydrochloride	5,067	100%	T3	0%	2,484
tiagabine hydrochloride 4 MG Oral Tablet tiagabine hydrochloride	5,067	100%	T3	0%	2,484
letermovir 240 MG Oral Tablet [Prevymis] letermovir	5,067	100%	T4	73.6%	2,391
letermovir 480 MG Oral Tablet [Prevymis] letermovir	5,067	100%	T4	73.6%	2,391
trametinib 0.5 MG Oral Tablet [Mekinist] trametinib	5,067	100%	T4	99.4%	2,289
trametinib 2 MG Oral Tablet [Mekinist] trametinib	5,067	100%	T4	99.4%	2,289
trametinib 0.05 MG/ML Oral Solution [Mekinist] trametinib	5,067	100%	T4	99.4%	2,289
{5 (cedazuridine 100 MG / decitabine 35 MG Oral Tablet [Inqovi]) } Pack [Inqovi 5 Tablet Pack] cedazuridine	5,067	100%	T4	99.4%	2,272
rufinamide 200 MG Oral Tablet rufinamide	5,067	100%	T3	54.8%	2,232
rufinamide 400 MG Oral Tablet rufinamide	5,067	100%	T4	54.8%	2,232
rufinamide 40 MG/ML Oral Suspension rufinamide	5,067	100%	T4	55.2%	2,232
alosetron 0.5 MG Oral Tablet alosetron	5,067	100%	T3	62.7%	2,223
alosetron 1 MG Oral Tablet alosetron	5,067	100%	T4	62.7%	2,223
ethosuximide 50 MG/ML Oral Solution ethosuximide	5,067	100%	T2	0%	2,145
ethosuximide 250 MG Oral Capsule ethosuximide	5,067	100%	T2	0%	2,145
dabrafenib 75 MG Oral Capsule [Tafinlar] dabrafenib	5,067	100%	T4	99.4%	2,120
dabrafenib 50 MG Oral Capsule [Tafinlar] dabrafenib	5,067	100%	T4	99.4%	2,120
dabrafenib 10 MG Tablet for Oral Suspension [Tafinlar] dabrafenib	5,067	100%	T4	99.4%	2,120
rilpivirine 25 MG Oral Tablet [Edurant] rilpivirine	5,067	100%	T4	0%	2,114
rilpivirine 2.5 MG Tablet for Oral Suspension [Edurant] rilpivirine	5,067	100%	T4	0%	2,114
phenelzine 15 MG Oral Tablet phenelzine	5,067	100%	T2	0%	2,029
regorafenib 40 MG Oral Tablet [Stivarga] regorafenib	5,067	100%	T4	99.4%	2,004
pimozide 1 MG Oral Tablet pimozide	5,067	100%	T3	13.3%	1,976
pimozide 2 MG Oral Tablet pimozide	5,067	100%	T3	13.3%	1,976
atazanavir 50 MG Oral Powder [Reyataz] atazanavir	5,067	100%	T4	0%	1,861
atazanavir 300 MG / cobicistat 150 MG Oral Tablet [Evotaz] atazanavir	5,067	100%	T4	0%	1,861
erythromycin 0.005 MG/MG Ophthalmic Ointment erythromycin	5,067	100%	T2	0%	1,861
atazanavir 150 MG Oral Capsule atazanavir	5,067	100%	T3	0%	1,861
atazanavir 200 MG Oral Capsule atazanavir	5,067	100%	T3	0%	1,861
atazanavir 300 MG Oral Capsule atazanavir	5,067	100%	T3	0%	1,861
danazol 100 MG Oral Capsule danazol	5,067	100%	T3	13.6%	1,840
ciprofloxacin 250 MG Oral Tablet ciprofloxacin	5,067	100%	T1	0%	1,810
ciprofloxacin 500 MG Oral Tablet ciprofloxacin	5,067	100%	T1	0%	1,810
ciprofloxacin 750 MG Oral Tablet ciprofloxacin	5,067	100%	T1	0%	1,810
ciprofloxacin 3 MG/ML Ophthalmic Solution ciprofloxacin	5,067	100%	T2	0%	1,810
efavirenz 600 MG / emtricitabine 200 MG / tenofovir disoproxil fumarate 300 MG Oral Tablet efavirenz	5,067	100%	T3	0%	1,779

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Source: CMS Quarterly Prescription Drug Plan Formulary PUF 2026. 6,046 drugs with RXCUI identifiers from NLM RxNorm. Coverage percentages based on 0 active Part D plans.

Compiled by Plainmedicare Editorial, Health Insurance Editorial Team