What are the main types of health data?

Health data includes structured data (coded diagnoses, medications, observations), unstructured data (clinical letters, notes, reports), imaging data (DICOM format — X-rays, CT, MRI), genomic data (whole genome sequencing, gene panels), device and sensor data (continuous monitoring, wearables), and administrative/operational data (waiting times, bed occupancy, workforce data). Each type has different storage, processing, governance, and interoperability requirements.