EXHIBIT 99.1
 
CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO TITLE 18, UNITED STATES CODE, SECTION 1350, AS ADOPTED
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
 
In connection with the Quarterly Report of Natus Medical Incorporated (the “Company”) on Form 10-Q for the quarterly period ended September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Tim C. Johnson, President and Chief Executive Officer of the Company, certify, pursuant to Title 18, United States Code, Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:
 
(1)    The Report fully complies with the requirements of Section 13(a) or 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/  Tim C. Johnson        

   
Print Name:  Tim C. Johnson
   
Title:  President and Chief Executive Officer
   
Date:  November 8, 2002
 
 
In connection with the Quarterly Report of Natus Medical Incorporated (the “Company”) on Form 10-Q for the quarterly period ended September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Glenn A. Bauer, Chief Financial Officer of the Company, certify, pursuant to Title 18, United States Code, Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:
 
(1)    The Report fully complies with the requirements of Section 13(a) or 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/  Glenn A. Bauer

   
Print Name:  Glenn A. Bauer
   
Title:  Chief Financial Officer
   
Date:  November 8, 2002