The covered entity (CE), Harris County Hospital District dba Harris Health System, reported that a software application exposed the protected health information (PHI) of 455,676 individuals. The PHI involved included names, dates of birth, addresses, Social Security and drivers’ license numbers, diagnoses, lab results, medications, and other treatment information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards to better protect PHI.