Ontology development is a systematic technique to represent the existing and new knowledge about a specific domain by using some models to present the system in which conceptualization is involved. This thesis presents the use of ontologies to formally represent ontology-based competence model for potential users of quality registry report in a healthcare organization. The model describes the professional and occupational interests and needs of the users through structuring and describing their skills and qualifications. There are individual competences model having two main parts: general competence and occupational competence. The model is implemented in an ontology editor. Although our competence model gives the general view about all medical areas in a hospital, from implementation point of view, we have considered only Cardiology area in detail. The potential users of quality registry are medical staff, county council staff and Pharmaceutical staff. In this report we have also used different classifications of education, occupational fields and diseases. A user can get information about the patient and specific disease with treatment tips by using various organizational resources: i.e. quality registries, electronic medical reports, and online journals. Our model also provides a support of information filtering which filters the information according to the need and the competencies of the users.