Exhibit 23.3 [BDO LETTERHEAD] Consent of Independent Certified Public Accountants Genesis Health Ventures, Inc. 148 West State Street Kennett Square, Pennsylvania 19348 We hereby consent to the incorporation by reference in the Prospectus constituting a part of Amendment No. 1 to the Registration Statement of Form S-3 (333-11847) for the registration of 176,355 shares of your common stock, of our report dated August 20, 1996, relating to the consolidated financial statements of Geriatrics & Medical Companies, Inc. as of May 31, 1996 and for each of the years in the two-year period ended May 31, 1996 included in the Genesis Health Ventures, Inc.'s current report on Form 8-K/A dated July 11, 1996 filed with the Securities and Exchange Commission. We also consent to us being named as "Experts" in the Prospectus. /s/ BDO Seidman, LLP -------------------------- BDO Seidman, LLP Philadelphia, Pennsylvania December 16, 1996