What are "diagnostic codes" primarily used for in healthcare?

Diagnostic codes are primarily used to define the reasons for patient visits and the conditions that necessitate treatment. These codes, found in classifications such as the International Classification of Diseases (ICD), provide essential information that helps healthcare providers document patient encounters accurately. By categorizing diseases, injuries, and other health-related issues, diagnostic codes facilitate effective communication among healthcare professionals, supporting clinical decision-making and care coordination.

Moreover, diagnostic codes play a critical role in healthcare billing and insurance processes, as they justify the medical necessity for treatments and procedures. This also helps in tracking epidemiological trends, evaluating population health, and conducting research related to public health and clinical outcomes. Thus, the primary function of these codes is to clearly articulate why patients seek care, ensuring that healthcare systems can provide appropriate and targeted interventions.