Ayesha Kounin et al, International Journal of Computer Science and Mobile Computing, Vol.3 Issue.9, September- 2014, pg. 564-572 © 2014, IJCSMC All Rights Reserved 564 Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology ISSN 2320–088X IJCSMC, Vol. 3, Issue. 9, September 2014, pg.564 – 572 RESEARCH ARTICLE IEHRC - An Approach towards Interoperable E-Health Records over Cloud using ECHISTAR Ayesha Kounin 1 , Mohammed Ali Shaik 2 , K.Pranav Kumar 3 ¹Pursuing M.Tech in CSE & JNTU Hyderabad, India ²Department of CSE ARTI, Warangal, Telangana, India ³Department of CSE ARTI, Warangal, Telangana, India 1 ayeshakounin2015@gmail.com, 2 niharali@gmail.com, 3 pranavkumar47@gmail.com Abstract-- We propose and present a cloud-based approach for designing an interoperable electronic health record (EHR) system implemented in a cloud computing environment that provides several benefits to all the stakeholders or end users among healthcare ecosystem such as patients or providers or payers, etc. Due to lack of data interoperability standards in society proposals of solutions are been considered to be major obstacle in the sharing of healthcare data between different stakeholders. Here in this paper we propose a system that is ECHISTAR: Electronic cloud health information systems technology architecture that achieves electronic semantic interoperability through the use of a generic design methodology that uses a reference model which defines a general purpose set of data structures and architecture type oriented models that define the clinical data attributes. ECHISTAR application components are designed by using the cloud component model approach that consists of loosely coupled components that communicate asynchronously with one another in a brokered fashion by using an approach for electronic semantic interoperability, data integration, and essential security. Keywords— EHR, data integration, electronic health records, healthcare I. INTRODUCTION Electronic ecosystem consists of distinct healthcare providers such as doctors, physicians, consultants, specialists, etc. and distinct areas of end-users or payers such as health insurance companies, pharmaceutical companies, IT recruiter firms, and of course patients. The process includes provision of massive healthcare data that is available in the form of structured data and unstructured data on dissimilar data sources such as relational databases, file servers, flat files, etc. and in various formats. When a patient is admitted to a hospital, his or her information is entered as input to electronic health record (EHR) systems after which the physicians diagnose the patient and the diagnostic information from medical devices such as CT scanners or MRI scanners, etc. are