DaVita Inc. provides kidney dialysis services through a network of 2,816 outpatient dialysis centers in the United States, serving 204,200 patients, and 321 outpatient dialysis centers in 10 other countries serving 3,200 patients. The company primarily treats end-stage renal disease (ESRD), which requires patients to undergo dialysis 3 times per week for the rest of their lives unless they receive a donor kidney. The company has a 37% market share in the U.S. dialysis market. It is organized in Delaware and based in Denver. The company is ranked 271st on the Fortune 500.