ArticleHealth services research2023
The influence of Medicare Part D on the list pricing of brand drugs.
Article in Health services research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
4 citing papers in PubMed.
- Eluxadoline Utilization in Medicare Part D, 2016-23: National Trends, Geographic Variation, Prescriber-Type Patterns, and Spending.Drugs - real world outcomes · 2026Article
- Lagged-price reimbursement contracts: The impact of medicare Part B on pharmaceutical price growth.Journal of public economics · 2026Article
- Medicare Part D Protected-Class Policy Is Associated With Lower Drug Rebates.Health affairs (Project Hope) · 2024Article
- Reforming Drug Price Regulation: Using Tools That Work.Inquiry : a journal of medical care organization, provision and financingArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo compare the Medicare Part D market share of brand drugs with their net-to-list price ratio. DATA SOURCES AND STUDY
settingSSR Health Brand Net Price Tool and Medical Expenditure Panel Survey, 2007-2019. STUDY
designFor each drug, we calculated the ratio of net to list price and the percent of users that were Medicare-eligible. We compared these cross-sectionally in each year and estimated a difference-in-differences model comparing drugs with high or low Medicare market shares (MMS) after following changes to program incentives in 2010. DATA COLLECTION/EXTRACTION
methodsThe sample included brand drugs without generic competitors appearing in both datasets. PRINCIPAL
findingsNet-to-list price ratios were negatively correlated with MMS in the later years of our sample. In 2019, a 10% increase in MMS was associated with a significant 4.6% [95% CI: 2.1%, 7.1%] decrease in net-to-list ratio. Difference-in-differences showed net-to-list price ratios of drugs with above median MMS fell relative to those with below median MMS. By 2019, we observe an absolute reduction of -0.2 [95% CI: -0.29, -0.11], representing 28% reduction relative to the average ratio in 2010.
conclusionsGreater exposure to the Medicare Part D market was associated with larger differences between net and list prices of drugs.
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Registered trials
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