This chapter provides an overview of the healthcare delivery system. A figure illustrates how six different parts of the system relate to each other. The primary care level plays a key role in many countries by representing the gate, in which referrals to secondary care are being made. Tertiary care is principally of two types depending on patients’ prognosis: chronic care or rehabilitation. In addition to the three care levels, there are two parts with quite different roles: pharmacies provide pharmaceuticals, and sickness benefit schemes compensate the sick for their income losses. A recurrent policy challenge is to make each provider level take into account the resource implications of their isolated decisions outside of their own budgets. A brief discussion is included on the scope for ‘internal markets’.