The Centers for Medicare and Medicaid Services (CMS) discovered a bug in their Blue Button 2.0, prompting them to temporarily shut down the data-sharing tool. Blue Button 2.0 is designed to allow Medicare beneficiaries to share their claims data with third-party software applications (apps), services and research programs. The bug caused more than 200 beneficiaries’ claims data to be shared with the wrong app; thousands more had their data assigned to the wrong person. CMS has stressed that the security issue only impacts Blue Button 2.0, not Plan Finder or Medicare.gov. [Included] is more on the bug, which apps were impacted and what CMS is doing to remedy the issue.

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