ArticleHealth affairs (Project Hope)
The effect of Medicare Part D coverage on drug use and cost sharing among seniors without prior drug benefits.
Article in Health affairs (Project Hope). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 4 of them syntheses that pooled it.
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
39 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Pharmaceutical policies: effects of regulating drug insurance schemes.The Cochrane database of systematic reviews · 2022Pooled it
- Pharmaceutical policies: effects of cap and co-payment on rational use of medicines.The Cochrane database of systematic reviews · 2015Pooled it
- Medicare Part D's effect on the under- and overuse of medications: a systematic review.Journal of the American Geriatrics Society · 2011Pooled it
- Changes in drug use and out-of-pocket costs associated with Medicare Part D implementation: a systematic review.Journal of the American Geriatrics Society · 2010Pooled it
- Racial differences in antilipemic use and lipid control in high-risk older adults: post-Medicare Part D.American heart journal · 2013Trial
- Medicare Part D and Hospital Admissions due to Antimicrobial Resistance.Health economics · 2026Article
- Why do few Medicare beneficiaries switch their Part D prescription drug plans? Insights from behavioral sciences.Journal of public health policy · 2026Review
- Prescribing trends of proton pump inhibitors, antipsychotics and benzodiazepines of medicare part d providers.BMC geriatrics · 2022Article
- Regional Variation in Pharmacist Perception of the Financial Impact of Medicare Part D.Pharmacy (Basel, Switzerland) · 2018Article
- Socioeconomic Disparities in Mortality Among Women With Incident Breast Cancer Before and After Implementation of Medicare Part D.Medical care · 2017Article
- Patterns of Statin Use in Older Medicare Beneficiaries With Traumatic Brain Injury.The Journal of pharmacy technology : jPT : official publication of the Association of Pharmacy Technicians · 2017Article
- How Did Medicare Part D Affect Racial and Ethnic Disparities in Drug Coverage?The journals of gerontology. Series B, Psychological sciences and social sciences · 2016Article
- The Effects of Cost Sharing on Adherence to Medications Prescribed for Concurrent Use: Do Definitions Matter?Journal of managed care & specialty pharmacy · 2015Article
- The introduction of generic aromatase inhibitors and treatment adherence among Medicare D enrollees.Journal of the National Cancer Institute · 2015Article
- Persistence with secondary prevention medications after acute myocardial infarction: Insights from the TRANSLATE-ACS study.American heart journal · 2015Observational
- Gastroprotective agent underuse in high-risk older daily nonsteroidal anti-inflammatory drug users over time.Journal of the American Geriatrics Society · 2014Observational
- Cost sharing and decreased branded oral anti-diabetic medication adherence among elderly Part D Medicare beneficiaries.Journal of general internal medicine · 2013Article
- Effects of Medicare Part D coverage gap on medication adherence.The American journal of managed care · 2013Article
- Dementia and out-of-pocket spending on health care services.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2013Article
- Time trends in medication use and expenditures in older patients with rheumatoid arthritis.The American journal of medicine · 2012Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
This study evaluates the effect of Medicare Part D among seniors who previously lacked drug coverage, using time-trend analyses of patient-level dispensing data from three pharmacy chains. Of 114,766 seniors without drug benefits, 55 percent initiated drug insurance under Part D. After the penalty-free Part D enrollment period, use of statins, clopidogrel, and proton pump inhibitors stabilized at levels ranging from 11 percent to 37 percent above the trend that would have been expected if Part D had not been implemented. Patients reaching the Part D coverage gap (12 percent) experienced a decrease in essential medication use ranging from 5.7 percentage points per month for warfarin to 6.3 percentage points for statins.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.