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The primary function of the Clinical Data Warehouse (CDW) in healthcare is indeed to store and analyze large amounts of clinical data for decision-making. This centralized repository aggregates data from various sources within the healthcare system, including electronic health records, laboratory systems, and other clinical applications. The objective of a CDW is to improve patient care and operational efficiency by enabling healthcare organizations to analyze trends, outcomes, and performance metrics based on comprehensive data analysis.

This function is crucial as it allows healthcare providers to make informed decisions that can enhance patient outcomes, optimize resources, and facilitate research. By systematically organizing and making sense of vast datasets, the CDW contributes significantly to evidence-based practices and clinical improvements.

Other options, while important aspects of healthcare operations, do not specifically relate to the main purpose of a Clinical Data Warehouse. Physician-patient communication, managing hospital finances, and processing insurance claims are distinct elements of healthcare management that do not encompass the primary analytical and storage functions of a CDW.