At 11, Payton Herres received a donated heart; at 26, she needed viral posts, advocates and Mark Cuban's pharmacy to keep accessing her anti-rejection drug

At 11, Payton Herres received a donated heart after years of health problems caused by Ebstein’s anomaly. Fifteen years later, she faced a fight to access everolimus, the anti-rejection medicine she had relied on since 2013. After her insurer stopped covering…