The study will evaluate the impact of a "Wireless Monitoring" intervention for chronically ill individuals with diabetes, hypertension, and arrhythmias. This project utilizes the concept of 'hot-spotting' in that investigators will aim to target individuals with the highest health care needs, which investigators have defined to be patients with these diagnoses who showed the highest health care utilization rates over the previous 12-month period based on reimbursement data from a large health care third party administrator. Investigators aim to determine if wireless monitoring can reduce health care service utilization and thus health care costs for the small number of patients who spend the greatest number of health care dollars, thereby cutting the overall amount of health care spending dramatically.