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Healthcare systems worldwide are undergoing rapid transformation due to technological advancement, demographic shifts, increasing disease burden, and rising expectations for quality and accountability. In this context, data has become a critical asset for decision-making, policy formulation, clinical improvement, and operational efficiency. Effective health care management increasingly depends on the systematic collection, integration, and analysis of diverse data sources. Understanding the major sources of healthcare data, along with the role of data architecture and interoperability, is essential for strengthening health analytics and improving outcomes. Healthcare data originates from multiple clinical, administrative, operational, and external sources. One of the most significant sources is Electronic Health Records (EHRs). EHR systems store comprehensive patient information, including medical history, diagnoses, medications, laboratory results, radiology reports, treatment plans, immunization records, and physician notes. These systems provide structured and unstructured data that support clinical decision-making, quality monitoring, and research activities. Because EHRs capture real-time patient interactions within healthcare facilities, they form the backbone of modern health information systems. Another important source is administrative and billing data. Hospitals and insurance providers generate extensive records related to patient registration, admissions, discharges, billing claims, reimbursement processes, and coding systems such as ICD and CPT. This data is primarily used for financial management, performance evaluation, regulatory compliance, and insurance processing. Administrative data is valuable for analyzing cost trends, utilization patterns, and resource allocation within healthcare institutions. Laboratory information systems (LIS) and radiology information systems (RIS) also contribute significantly to healthcare data. Laboratory systems generate test results, including blood tests, pathology reports, and microbiology findings. Radiology systems manage imaging data such as X-rays, CT scans, MRIs, and ultrasounds. These specialized systems produce structured diagnostic information that supports disease detection, treatment monitoring, and research studies. When integrated with EHRs, they enhance the completeness and accuracy of patient records. Pharmacy systems represent another vital source of data. These systems track prescription orders, medication ______ ________ _________ ______ _________ ___ _____ __________ __________ _____.
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