Abstract
The objective of this paper is to deal with cost evaluation within the healthcare sector and the tools which could be used to collect data related to patients' clinical and diagnostic pathways. The patient-based methodology will be considered both for the application within the healthcare supply funding and as a tool to evaluate each patient's clinical history. Alternative information system and database applications will be taken into consideration to collect information. An adequate application of the methodology will be proposed within the HIV+ patients' context, for the Lombardia Region.