Sadarangani had always found Carlisle the best doctor of his generation, and genuinely praised his work and dedication. They worked together until 1991 when Carlisle's family moved on.
Sadarangani has started working at St. Joseph's sometime after Carlisle's family moved away.
He was surprised to hear from Carlisle when he brought a severely injured Bella into the emergency center, and admitted her into the hospital. After her condition stabilized, Sadarangani asked Carlisle for assistance in a few medical cases that needed his expertise. Seeing that Bella no longer needed him, he complied and left her in Edward's care.