Power of Attorney for Suresh Gunasekaran at CareDx, Inc.

Suresh Gunasekaran, a director of CareDx, Inc., has appointed Adil Aslam, Jeff Novack, Colleen Martin-Garcia, and Chande Chang as his attorneys-in-fact. This Power of Attorney authorizes them to execute and file Form 3, 4, or 5 reports on his behalf as required by Section 16(a) of the Securities Exchange Act of 1934. The attorneys-in-fact are also empowered to perform any necessary acts related to these filings and to take any other actions deemed beneficial or legally required. The Power of Attorney remains in effect until Gunasekaran is no longer required to file such reports or until he revokes it in writing. The document was executed on October 15, 2025.