Now a day’s cloud computing is used in all emerging area like banking sector, automobile, finance, agricultural sector, health sector etc. It changes the scenario of IT industry by providing services in cost effective and continuous manner without administrative hassle. By using service model of cloud in the form of SAAS, PAAS, IAAS any one can build their infrastructure, worked on any application and any platform without financial impact on any organization that’s make cloud computing more popular in small and mediums scale industry. Cloud technology is emerged and applied to health care sector also in many forms. The main application of these is to centralized storage of Electronic Health Record (EHR) or Electronic Medical Record (EMR). Centralized storage of EHR in cloud is innovative concept but at the same time it arises many security issues related to sharing of , Access control ,privacy issues of EHR .so our main motive is to designed such innovative model for exchange of EHR among Health care organization and Hospitals that it can be user friendly easily share among all Health care organization (HCO) and Hospitals cloud as data sharing vehicle and particularly achieving highest level of security by designing appropriate algorithm and apply on EHR In our work we designed a fragmented EHR Model and two tire security of encryption level at the same time for EHR to be more secure we apply access control on EHR to enhance secrecy. The cloud based model to be proposed to offer secure sharing of EHR between inters HCO which is geographically lactated differently. It is patient centric model (Patient having right to share their EHR