23.1 Consent of Independent Certified Public Accountants We have issued our report dated March 26, 1999, accompanying the consolidated financial statements included in the Annual Report of Greenbriar Corporation on Form 10-K for the year ended December 31, 1998. We hereby consent to the incorporation by reference of said report in the Registration Statements of Greenbriar Corporation on Form S-3 (File No. 33-64840) and Form S-8 (File Nos. 33-65856 and 33-33985). /s/ GRANT THORNTON LLP Dallas, Texas April 14, 1999