Cerner Corporation (NASDAQ: CERN) is an international health care information technology corporation that specializes in providing complete systems for hospitals and other medical organizations to manage and integrate all electronic medical records, computerized physician order entry (CPOE), and financial information.

Cerner claims to be the largest provider of electronic medical systems in the United States. Its largest competitor, McKesson, is larger in size but McKesson has income from other non-technology medical sources.

As of Second Quarter 2009 its systems are licensed by 8,000 facilities around the world including 2,100 hospitals, 1,500 pharmacies, and 3,300 physician practices representing 30,000 physicians.

It has more than 10,000 employees. As of June 2006^[update], approximately 1,900 associates in the United States and 600 associates in India were involved full-time in the software development aspect of the company. Cerner has more than 6,000 clients worldwide.

Cerner was founded in 1979 by Neal Patterson, Paul Gorup, and Cliff Illig, who were colleagues at Arthur Andersen. Its original name was PGI & Associates. It was renamed Cerner in 1984 when it rolled out its first system, PathNet. It went public in 1986.