Author

David Armstrong is a reporter at ProPublica, specializing in health care investigations. He was a senior enterprise reporter for STAT, where he wrote about abuses in the addiction treatment industry, the rise of fentanyl and the recruiting of college football players with histories of concussions. Armstrong previously worked in the investigative unit at Bloomberg News, where he reported on the overuse of cardiac stents, problematic back surgeries and excesses in the pain industry.