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Purpose
To evaluate the validity of ICD‐10‐CM code‐based algorithms as proxies for influenza in inpatient and outpatient settings in the USA.
Methods
Administrative claims data (2015–2018) from the largest commercial insurer in New Jersey (NJ), USA, were probabilistically linked to outpatient and inpatient electronic health record (EHR) data containing influenza test results from a large NJ health...