Before helping direct HCA's clinical efforts on coronavirus, Perlin oversaw initiatives that continued to push impressive metrics across the chain: a 23% increase in its sepsis survival rate, a 39-minute median for door-to-needle time for stroke care (60 minutes is national target), a maternal mortality rate of 4.2 per 100,000, compared with the national rate of 14.2 per 100,000, and more.