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We propose Health Quest – a Deep Neural Network based Clinical Decision Support (CDS) system, which helps in diagnosing diseases through a patient’s Electronic Health Record (EHR). Health Quest is unique and distinct from existing CDS systems as it is a generalized system, which is not targeted to diagnosing a specific disease and can detect multiple diseases at a time. It utilizes a patient’s medical and family history and incorporates natural language processing to convert this information in a structured text for further processing. Multi-label classification is used to identify multiple diseases at a time. For improved accuracy and precision, Health Quest has been implemented on GPUs. We evaluate Health Quest on a dataset containing 5000 EHR records, with information of patients suffering from multiple diseases. We present the design and implementation of Health Quest and describe evaluation results. It …