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Validation of EHR medication fill data obtained through electronic linkage with pharmacies
Saul Blecker1, Samrachana Adhikari2, Hanchao Zhang2
1Department of Population Health and Department of Medicine, NYU School of Medicine, New York, NY.
Journal of Managed Care & Specialty Pharmacy
|October 1, 2021
Summary
Linked electronic health records (EHRs) and pharmacy data accurately capture medication fills, offering higher adherence estimates than insurance claims for point-of-care interventions.
Area of Science:
- Health Informatics
- Pharmacoeconomics
- Clinical Pharmacy
Background:
- Electronic health records (EHRs) and pharmacy data linkages offer potential for real-time medication adherence assessment.
- Accurate medication adherence data is crucial for effective point-of-care interventions.
Purpose of the Study:
- To validate linked EHR-pharmacy data against insurance claims for patients in a large healthcare system.
- To assess the reliability of EHR-pharmacy data for point-of-care medication adherence monitoring.
Main Methods:
- Retrospective cohort study of adult patients with antihypertensive medication orders.
- Linked EHR-pharmacy data (Surescripts, PBM) compared with institutional insurance claims data.
- Medication adherence estimated using proportion of days covered (PDC).
Main Results:
- Linked EHR-pharmacy data captured medication fills for 87.5% of patients.
- High concordance (91.3%-98.9%) observed between linked EHR-pharmacy and insurance claims data.
- Medication adherence estimates were significantly higher using linked EHR-pharmacy data (42%) versus insurance claims (30%).
Conclusions:
- Linked EHR-pharmacy data reliably capture medication fills for most patients.
- EHR-pharmacy data provide higher medication adherence estimates than insurance claims.
- Pharmacy fill data within EHRs are suitable for point-of-care adherence assessment.
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