DOI

10.17077/etd.tg6695hp

Document Type

Dissertation

Date of Degree

Fall 2016

Degree Name

PhD (Doctor of Philosophy)

Degree In

Pharmacy

First Advisor

Urmie, Julie M.

First Committee Member

Carnahan, Ryan M.

Second Committee Member

Doucette, William R.

Third Committee Member

Polgreen, Linnea A.

Fourth Committee Member

Sorofman, Bernard A.

Abstract

Background: In response to high cost and inadequate quality, the healthcare system is in the midst of a transition from paying for volume to paying for value. Billions of dollars could be saved through more effective medication use, and evidence supports the role of the community pharmacist in lowering healthcare cost and improving healthcare quality through medication optimization. Despite this, value-based payment models for community pharmacies are rare, and those that do exist have not been critically evaluated and implementation in a commercially insured population is rare.

Objective: The first objective was to design and test a conceptual model of pharmacy value. The second objective was to evaluate variation in the value community pharmacies provide a commercial insurer by assessing the relationship between attributed patients’ healthcare quality and cost.

Methods: This study used prescription and medical claims data for 2012 and 2013 from a large commercial insurer in Iowa and South Dakota. Patients were attributed to the pharmacy filling the majority of their prescriptions. Pharmacies’ weekly prescription volume and Sunday prescription filling behavior were used as structural measures of healthcare quality. Percent of days covered (PDC) metrics for beta-blockers, statins, renin-angiotensin system antagonists and non-insulin diabetes agents were used as process metrics. Pharmacies were excluded if the denominator for any PDC metric was less than 15. Outcome metrics consisted of a non-trauma, non-cancer, unplanned hospitalization rate and a non-trauma ED visit rate. Cost impact was categorized into pharmaceutical, medical, and total cost of care. High quality pharmacies with typical or low associated costs or low cost pharmacies with typical to high quality were identified as high value and vice versa for low value. All metrics were risk-adjusted using mixed effect models with a random pharmacy intercept. The ratio between observed and expected quality scores was used for quality scoring. Quality outliers were identified by comparing the 95% CI around pharmacies’ risk-adjusted scores to the all-pharmacy risk-adjusted score mean. A t-test was used to assess variation in pharmacy value.

Results: There were 171 pharmacies and 74,581 patients eligible for scoring on all quality metrics. Mixed effects models observed a small but significant impact of pharmacy on process and outcome healthcare quality. No relationship between structures and processes, processes and outcomes was detected. Ten pharmacies were scored as high quality and nine as low quality. Similar numbers were identified for cost outliers, and significant variation in value was detected.

Implications/conclusions: Results support the hypothesis that high and low value pharmacies exist. A well-designed value-based payment model could be used to create incentives for pharmacists to enhance care for commercially insured patients, but validation is needed to ensure that incentives are aligned appropriately.

Public Abstract

Every consumer wants to get their money’s worth out of the things they buy. Unfortunately, in healthcare, it’s too often true that patients, insurers and the government are spending too much and getting too little in return. In short, the US healthcare system lacks value.

One opportunity for improving healthcare quality and reducing the cost of healthcare is optimizing how medications are used. Hundreds of billions of dollars can be saved every year by using medications better and more optimal use of medications can keep patients healthier longer.

Pharmacy, the profession most closely aligned with medication use, has been shifting the focus of pharmacists’ work away from dispensing medications towards improving patients’ health through closer oversight of medication use. Evidence suggests that there are community pharmacists who, through the course of their normal work, are making a difference in their patients’ health.

This study sought to identify pharmacies where pharmacists are adding value to the healthcare system by improving their patients’ health as well as pharmacies where pharmacists could be doing a better job. Using advanced statistical methods and insurance billing information, the results found that high value and low value pharmacies exist. This variation in pharmacy value could be used to create new payment models that reward pharmacists for a job well done, but more work is needed to ensure that systems to assess value are accurate.

Keywords

Donabedian, Outcomes, Pharmacy, Quality, Risk adjustment, Value

Pages

xi, 217 pages

Bibliography

Includes bibliographical references (pages 196-217).

Copyright

Copyright © 2016 Benjamin Y. Urick

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