DaVita Inc. provides kidney dialysis services through a network of 2,675 outpatient centers in the United States, serving 200,800 patients, and 367 outpatient centers in 11 other countries serving 49,400 patients. The company primarily treats end-stage renal disease (ESRD), which requires patients to undergo kidney dialysis 3 times per week for the rest of their lives unless they receive a kidney transplant via organ donation. The company has a 37% market share in the U.S. dialysis market[citation needed]. It is incorporated in Delaware and headquartered in Denver.