As per the Hospital Social Network List on edbenett.org, U.S. Hospitals that use Social Networking tools mainly rely on Twitter and facebook pages. Though many of these channels are being used for patient communication, very few are internally available to the healthcare providers, mainly for fear of improper use by employees. A well defined social media policy at such institutions is required before it can be opened for more extensive use. Take a look at Social Media Policies followed by a few major hospitals.