International comparisons always raise difficult problems, more especially when they deal with services which are jointly financed by households and government in varying shares with varying procedures in each country. This is obvious in the case of health where the area itself, the principles of economic analysis and the UN method of National Accounting appear to be either vague or unwieldy. Before any proposal it is necessary to review what is involved in the concept of service and the possibility of delimiting the health field inside which economic measures are feasible. Then using the SNA concept and with the help of six interdependent tables we propose two aggregates: the National Medical Consumption and the Current National Expenditure on health. The detailed and harmonized breakdowns of these global results make it possible to compare the structures of values, prices and quantities on an international base.