Medicare Part D coverage · glycerol phenylbutyrate · RxCUI 1368453
glycerol phenylbutyrate 1100 MG/ML Oral Solution
Per the CMS 2026 Part D formulary file, glycerol phenylbutyrate 1100 MG/ML Oral Solution is covered by 181 Medicare Part D plans (3.6% of enrollable products), averaging Tier 4, with prior authorization required on 95.1% of covering formularies.
- 3.6%
- Plan coverage
- 181
- Plans covering
- T4
- Avg tier
- 95.1%
- Prior auth required
What the CMS Formulary Data Shows for glycerol phenylbutyrate 1100 MG/ML Oral Solution
Per the CMS 2026 Part D formulary file, glycerol phenylbutyrate 1100 MG/ML Oral Solution (RxNorm concept RXCUI 1368453, generic name glycerol phenylbutyrate) appears on 41 distinct formulary files spanning 181 Medicare Part D plan offerings - 3.6% of enrollable Part D products, selective placement; verify formulary inclusion before enrolling. Tier placement ranges from Tier 1 to Tier 6, with a cross-plan average of Tier 4.
Real-world access to glycerol phenylbutyrate 1100 MG/ML Oral Solution depends on utilization management as much as tier placement: 95.1% of covering formularies require prior authorization. 0% require step therapy. 0% apply quantity limits.
Historical spending context from the CMS Medicare Part D Drug Spending Dashboard shows 87 Part D beneficiaries filled glycerol phenylbutyrate 1100 MG/ML Oral Solution in 2023, with total plan-and-beneficiary spending of $73,454,459 and an average per-beneficiary annual cost of $844,304.13. The plan-by-plan detail below lists exactly which PDP and MA-PD contracts carry glycerol phenylbutyrate 1100 MG/ML Oral Solution today.
Coverage Details
- Formularies covering
- 41
- Plans covering
- 181
- Coverage rate
- 3.6%
- Tier range
- Tier 1 – Tier 6
- Average tier
- Tier 4, Non-Preferred
Restrictions
- Prior authorization required
- 95.1% of formularies
- Step therapy required
- 0% of formularies
- Quantity limits
- 0% of formularies
2023 Medicare Spending
- Beneficiaries
- 87
- Total spending
- $73,454,459
- Avg per beneficiary
- $844,304.13
Tier Distribution Across Plans
Medicare Advantage Plans (MA-PD) Covering glycerol phenylbutyrate 1100 MG/ML Oral Solution
100 Medicare Advantage plans with Part D drug coverage include this drug.
| Plan | Insurer | Tier | PA | Premium | States |
|---|---|---|---|---|---|
| CareAdvantage (HMO D-SNP) | SAN Mateo Health Commission | T1 | Yes | $0 | CA |
| SeniorCare Complete (HMO D-SNP) | South Country Health Alliance | T1 | Yes | $0 | MN |
| AbilityCare (HMO D-SNP) | South Country Health Alliance | T1 | Yes | $0 | MN |
| Alameda Alliance Wellness (HMO D-SNP) | Alameda Alliance FOR Health | T1 | Yes | $0 | CA |
| Community Care's Partnership Program (HMO D-SNP) | Community Care Health Plan, Inc. | T1 | No | $0 | WI |
| Platino Blindao (HMO D-SNP) | Triple S Advantage, Inc. | T1 | Yes | $0 | PR |
| Platino Enlace (HMO D-SNP) | Triple S Advantage, Inc. | T1 | Yes | $0 | PR |
| Platino Advance (HMO D-snp) | Triple S Advantage, Inc. | T1 | Yes | $0 | PR |
| Platino Plus (HMO D-snp) | Triple S Advantage, Inc. | T1 | Yes | $0 | PR |
| CalOptima Health OneCare Complete (HMO D-SNP) | Orange County Health Authority | T1 | Yes | $0 | CA |
| Mass General Brigham SCO (HMO D-SNP) | Mass General Brigham Health Plan, Inc | T1 | Yes | $0 | MA |
| Mass General Brigham One Care (HMO D-SNP) | Mass General Brigham Health Plan, Inc | T1 | Yes | $0 | MA |
| Highmark Wholecare Medicare Assured Diamond (HMO D-SNP) | Gateway Health Plan, Inc. | T1 | Yes | $0 | PA |
| Highmark Wholecare Medicare Assured Diamond (HMO D-SNP) | Gateway Health Plan, Inc. | T1 | Yes | $0 | PA |
| Highmark Health Options Duals (HMO D-SNP) | Highmark Health Options West Virginia Inc. | T1 | Yes | $0 | WV |
| Highmark Health Options Duals (HMO D-SNP) | Highmark Bcbsd, Inc. | T1 | Yes | $0 | DE |
| Gold Dialysis & Kidney Complete (HMO-POS C-SNP) | Gold Kidney OF Florida Inc | T1 | Yes | $4.80 | FL |
| Highmark Wholecare Medicare Assured Ruby (HMO D-SNP) | Gateway Health Plan, Inc. | T1 | Yes | $13.10 | PA |
| Gold Dialysis & Kidney Complete (HMO-POS C-SNP) | Gold Kidney OF Arizona | T1 | Yes | $17.00 | AZ |
| Highmark Wholecare Medicare Assured Ruby (HMO D-SNP) | Gateway Health Plan, Inc. | T1 | Yes | $17.60 | PA |
Show the next 30 plans
| Highmark Health Options Duals Select (HMO D-SNP) | Highmark Bcbsd, Inc. | T1 | Yes | $31.20 | DE |
| PHP (HMO C-snp) | Aids Healthcare Foundation | T4 | Yes | $0 | CA |
| VNS Health Total (HMO D-SNP) | VNS Choice | T4 | Yes | $0 | NY |
| VNS Health EasyCare Plus (HMO D-SNP) | VNS Choice | T4 | Yes | $51.60 | NY |
| Community Blue Medicare HMO Signature (HMO) | Highmark Western and Northeastern New York Inc. | T5 | Yes | $0 | NY |
| Community Blue Medicare HMO Merit (HMO) | Highmark Western and Northeastern New York Inc. | T5 | Yes | $0 | NY |
| Community Blue Medicare PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Community Blue Medicare Plus PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Merit (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Distinct (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Community Blue Medicare Plus PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue Plus PPO Merit (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Community Blue Medicare PPO Signature (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Merit (PPO) | Highmark Senior Health Company | T5 | Yes | $0 | PA |
| Community Blue Medicare HMO Signature (HMO) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Security Blue HMO-POS ValueRx (HMO-POS) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Community Blue Medicare HMO Signature (HMO) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Together Blue Medicare HMO Signature (HMO) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Community Blue Medicare HMO Distinct (HMO) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Complete Blue HMO Distinct (HMO) | Highmark Choice Company | T5 | Yes | $0 | PA |
| Complete Blue PPO Distinct (PPO) | Highmark Senior Solutions Company | T5 | Yes | $0 | WV |
| Complete Blue PPO Signature (PPO) | Highmark Senior Solutions Company | T5 | Yes | $0 | WV |
| Complete Blue PPO Signature (PPO) | Highmark Senior Solutions Company | T5 | Yes | $0 | WV |
| Complete Blue PPO Merit (PPO) | Highmark Senior Solutions Company | T5 | Yes | $0 | WV |
| Complete Blue PPO Signature (PPO) | Highmark Bcbsd Inc. | T5 | Yes | $0 | DE |
| MCS Classicare RxMax (HMO) | MCS Advantage, Inc. | T5 | Yes | $0 | PR |
| MCS Classicare Platino Ideal (HMO D-SNP) | MCS Advantage, Inc. | T5 | Yes | $0 | PR |
Showing top 50 of 100 plans.
Frequently Asked Questions
Is glycerol phenylbutyrate 1100 MG/ML Oral Solution covered by Medicare Part D?
Yes, glycerol phenylbutyrate 1100 MG/ML Oral Solution is covered by 181 Medicare Part D plans (3.6% of all Part D formularies).
What tier is glycerol phenylbutyrate 1100 MG/ML Oral Solution on Medicare Part D plans?
glycerol phenylbutyrate 1100 MG/ML Oral Solution averages Tier 4 across Part D plans, ranging from Tier 1 to Tier 6.
Does glycerol phenylbutyrate 1100 MG/ML Oral Solution require prior authorization?
95.1% of Part D formularies require prior authorization for glycerol phenylbutyrate 1100 MG/ML Oral Solution. Step therapy: 0%. Quantity limits: 0%.
How much does Medicare spend on glycerol phenylbutyrate 1100 MG/ML Oral Solution?
In 2023, total Medicare Part D spending on glycerol phenylbutyrate 1100 MG/ML Oral Solution was $73,454,459, covering 87 beneficiaries. The average spend per beneficiary was $844,304.13.
Read our methodology - how this data is sourced, computed, and verified.
Nationwide similar Part D drugs
Data-derived peers across the CMS Part D formulary extract: nearest average tier placement and nearest prior-authorization rate. Not therapeutic alternatives or same-generic strengths.
Closest average formulary tier
- dihydroergotamine mesylate 0.5 MG/ACTUAT Metered Dose Nasal Spray T4
- 0.5 ML darbepoetin alfa 0.2 MG/ML Prefilled Syringe [Aranesp] T4
- amoxicillin 250 MG / omeprazole 10 MG / rifabutin 12.5 MG Delayed Release Oral Capsule [Talicia] T4
- timolol hemihydrate 5 MG/ML Ophthalmic Solution [Betimol] T4
- deflazacort 18 MG Oral Tablet [Jaythari] T4
- bepotastine besilate 15 MG/ML Ophthalmic Solution [Bepreve] T4
Similar prior-authorization rate
- amikacin liposomal 70.3 MG/ML Inhalation Suspension [Arikayce] 95.1% PA
- lidocaine 0.05 MG/MG Medicated Patch [Tridacaine] 95% PA
- miglustat 100 MG Oral Capsule 95% PA
- lidocaine 0.05 MG/MG Medicated Patch [Lidocan] 95.2% PA
- maralixibat 10 MG Oral Tablet [Livmarli] 95.2% PA
- monomethyl fumarate 95 MG Delayed Release Oral Capsule [Bafiertam] 95.2% PA