CERNER (CERN) 10-Q 2005 Q2 Quarterly report

Exhibit 32.1

CERTIFICATION 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 July 2, 2005 (the Report) by Cerner Corporation (the Company), the undersigned, as the Chief Executive Officer of the Company, hereby certifies pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

/s/Neal L. Patterson

Neal L. Patterson, Chairman of the Board

and Chief Executive Officer

August 11, 2005

A signed original of this written statement required by Section 906 has been provided to Cerner Corporation and will be retained by Cerner Corporation and furnished to the Securities and Exchange Commission or its staff upon request.