Hazen became the CEO at HCA Healthcare in January. He was previously the chief operating officer at HCA. Hazen replaced R. Milton Johnson, who retired in December 2018. The company continued to perform well in 2019, with admissions growing nearly 6% in the third quarter of 2019 compared with the prior-year period. HCA's dominant stakes in growing markets typically puts the company ahead of its peers in key metrics, including volumes. HCA's revenue grew 11% year-over-year in the third quarter to $12.7 billion.