CareDx, Inc. specializes in creating diagnostic solutions tailored for transplant patients, offering a suite of products that monitor the health and acceptance of organ transplants. Their innovative offerings include AlloSure for kidney, heart, and lung transplant patients, which uses donor-derived cell-free DNA to detect organ rejection. Additionally, CareDx provides AlloMap Heart, a gene expression test for heart transplant recipients, and a range of HLA typing solutions like Olerup SSP and QTYPE. They also offer Ottr, a software for managing transplant patients, and AlloCare, a mobile app designed to support transplant recipients' journeys. Headquartered in South San Francisco, California, CareDx serves its products globally, directly and through distributors.