EXHIBIT 1 February 26, 2003 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 Gentlemen: We have read Item 4 of Form 8-K dated February 26, 2003 of Claimsnet.com, Inc. and are in agreement with the statements contained in Item 4 (a) paragraphs (1), (2), (4) and (5) therein. We have no basis to agree or disagree with other statements of the registrant contained therein. Very truly yours, ERNST & YOUNG LLP