Exhibit 23 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We consent to the incorporation by reference in Registration Statements No. 33-00184 and No. 33-43168 of E-Z-EM, Inc. on Form S-8 of our report dated July 27, 1999, appearing in the Annual Report on Form 10-K of E-Z-EM, Inc. and Subsidiaries for the fifty-two weeks ended May 29, 1999. GRANT THORNTON LLP Melville, New York July 27, 1999 -69-