How do primary care, secondary care, and tertiary care differ in a regional health system?

In a regional health system, medical services are organized into a pyramidal structure of three tiers, characterized by increasing specialization and technical sophistication.1

• Primary Care: This is the point of first contact between a patient and the health system. Provided by general practitioners, pediatricians, or nurses, it focuses on community-based health maintenance, prevention, and basic treatment. The vast majority of patient needs are addressed at this level.123
• Secondary Care: When patients require specialized knowledge or diagnostic tests (such as X-rays) beyond the scope of primary care, they are referred to this tier. It is typically provided by consultants or specialists in local or regional hospitals.142
• Tertiary Care: This level involves highly specialized, complex procedures and treatments. It is provided by major medical centers, such as teaching hospitals or units dedicated to specific conditions (e.g., mental health or specialized surgery), for patients who require advanced, state-of-the-art care.512

These levels are ideally linked by a two-way flow of patients, medical records, and personnel to ensure efficient, coordinated care across the region.2