This paper deals with medical data extraction from electronic patient record (EPR) system. Most of the medical data are stored in patient record systems, and data that are much valuable for medical research. If a researcher wants to extract medical information today, it has to be done manually because the data are stored in unstructured textual format in a system created by hospital staff. There is no way of extracting data in structure way. This paper is going to introduce an information extraction application for EPR system that allows the researcher to set up a study with inclusion and parameters for extraction for retrospective surveys in a webuser-interface environment. Inclusion is what the researcher would like to study (a defined category or criteria) and parameters specify the characteristics of inclusion the criteria. Result of this application provides an extracted clinical data that is used for retrospective surveys, downloadable to an MS-Excel file.