Emergency medical alarms come in the form of necklaces, pendants, bracelets, or simply devices attached to the bed. Upon pressing the button, a centralized paramedic service is immediately contacted and arrives at the scene, even if the user is unable to communicate via telephone or in any other manner. When purchasing an emergency medical alert, it is crucially important to periodically contact the associated company to perform tests and make sure that the service contract is still active. In many cases, health insurance or Medicare will cover the purchase of these devices, but be sure to contact your provider to verify this.