Exhibit 99.1 CareDx Reports First Quarter 2024 Results Raises 2024 Revenue Guidance to $274 to $282 Million BRISBANE, Calif., May 9, 2024, CareDx, Inc. (Nasdaq: CDNA) — today reported financial results for the first quarter ended March 31, 2024. First Quarter 2024 Highlights • Reported first quarter revenue of $72.0 million. • Revenue for Testing Services of $53.8 million, an increase of 15% as compared to the fourth quarter 2023. • Grew testing services patients results for the third consecutive quarter to ...