Estimates of health spending are based on a common boundary defining the range of health care services and medical goods to be included. These items are aggregated into broad categories of care, based on their purpose or mode of provision. For all OECD countries, curative and rehabilitative care services make up the bulk of health spending, and are primarily delivered through inpatient and outpatient services – these two categories typically account for 60% of all health spending (). Medical goods (mostly pharmaceuticals) take up a further 19%, followed by a growing share spent on long-term care (LTC) services, which in 2019 averaged around 15% of health spending. Administration and overall governance of the health system, together with preventive care, account for the remainder, with spending on disease prevention averaging only 2.7% of health spending. Both the level and the structure of spending can vary across countries due to factors such as how care is organised and prioritised across providers, input costs and population needs.