The Patient Protection and Affordable Care Act (PPACA) required the establishment of health insurance marketplaces to assist individuals in obtaining private health insurance coverage. The Department of Health and Human Services' CMS is responsible for overseeing the establishment of these marketplaces, including creating the website for obtaining coverage. The marketplaces became operational on October 1, 2013. As requested, this report examines the security and privacy of the Healthcare.gov website. GAO (1) describes the planned exchanges of information between the Healthcare.gov website and other organizations and (2) assesses the effectiveness of the programs and controls implemented by CMS to protect the security and privacy of the information and IT systems used to support Healthcare.gov. GAO compared the implementation of controls over Healthcare.gov's supporting systems with privacy and security requirements and guidelines. This is a public version of a limited official use only report that GAO issued in September 2014. Certain information on technical issues has been omitted from this version.