Quest Diagnostics

Quest Diagnostics operates as a medical laboratory company that provides a wide range of diagnostic testing services to healthcare providers, patients, and employers. Its core offerings include routine blood work, advanced genetic testing, oncology diagnostics, and wellness screenings that support clinical decision‑making. The organization serves a broad market across the United States, delivering laboratory results that assist in disease detection, monitoring, and prevention. By maintaining a network of patient service centers and laboratories, it enables timely access to test information for clinicians and individuals. Its services are designed to integrate with electronic health records to facilitate efficient information exchange.

In November 2016, Quest Diagnostics experienced a security incident involving unauthorized access to its mobile health application, which exposed personal health information for approximately 34,000 individuals. The compromised data included patient names, dates of birth, laboratory results, and some telephone numbers, while Social Security numbers, credit card details, and other financial information remained unaffected. Following the discovery, the organization notified all affected parties and conducted an investigation that found no evidence of misuse of the exposed information. The incident highlighted the company’s responsibility to safeguard patient data under regulations such as HIPAA and prompted improvements to its mobile application security measures. This event remains a notable example of how the organization responds to privacy breaches while continuing to deliver its diagnostic services.