Exhibit 32.1

CERTIFICATION FURNISHED PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the filing of the Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2017 (the "Report") by Cerner Corporation (the "Company"), the undersigned Interim Chief Executive Officer of the Company hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/Clifford W. Illig                              

Clifford W. Illig, Chairman of the Board

and Interim Chief Executive Officer

(Principal Executive Officer)

Date: October 27, 2017