DaVita Inc. (NYSE: DVA) stock surged on Tuesday after the company reported upbeat fourth-quarter earnings and fiscal 2026 guidance.Earnings SummaryThe kidney care provider reported adjusted earnings of $3.40 per share, beating the consensus of $3.16.Sales came in at $3.62 billion, up 5.8% year over year, beating the consensus of $3.497 billion.Revenue per treatment jumped from $410.59 to $422.60.The quarter change was primarily driven by increases in average reimbursement rates and other normal fluctuations ...