David Armstrong is a senior reporter at ProPublica, specializing in health care investigations. He joined ProPublica in March, 2018. Before that, 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.

Armstrong was also a reporter for nine years at the Wall Street Journal, where he reported on the influence of pharmaceutical and medical device companies on the practice of medicine – and the resulting harm to patients. He was part of the Journal staff awarded the 2002 Pulitzer Prize for breaking news reporting for coverage of the attacks of Sept. 11. Armstrong was a reporter for the Boston Globe from 1993 to 2000, where his investigation of safety flaws in elevators and escalators won a George Polk Award and the Investigative Reporters and Editors award.