Exhibit 32.1
CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
I, Peter Maag, Chief Executive Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| 1. | the Annual Report on Form 10-K for the quarter ended December 31, 2015 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| 2. | information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of CareDx, Inc. |
Date: | | March 28, 2016 | | By: | | /s/ Peter Maag |
| | | | | | Peter Maag |
| | | | | | President and Chief Executive Officer (Principal Executive Officer) |
I, Kenneth E. Ludlum, Chief Financial Officer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| 1. | the Annual Report on Form 10-K for the quarter ended December 31, 2015 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| 2. | information contained in such Annual Report Form 10-K fairly presents, in all material respects, the financial condition and results of operations of CareDx, Inc. |
Date: | | March 28, 2016 | | By: | | /s/ Kenneth E. Ludlum |
| | | | | | Kenneth E. Ludlum |
| | | | | | Chief Financial Officer (Principal Accounting and Financial Officer) |
