Mr. Carreyrou has covered a number of topics at the Journal, ranging from Islamist terrorism when he was on assignment in Europe, to the pharmaceutical industry. In 2015, he won a Pulitzer Prize for Investigative Reporting with several colleagues for a series of articles exposing fraud and abuse in Medicare, the federal health program for the elderly and disabled. Earlier in his career, he was also part of a Journal team that won a Pulitzer Prize for Explanatory Reporting for its coverage of corporate scandals. His coverage of the Silicon Valley blood-testing company Theranos has won George Polk, Gerald Loeb and Barlett & Steele awards.