1 Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the registration statements of Genzyme Corporation on Form S-8 (File Nos. 33-8881, 33-15616, 33-26329, 33-29918, 33-35067, 33-37236, 33-41933, 33-55656, 33-68188, 33-58359, 33-60437, 333-10003, 33-30007, 33-68208, 33-58351, 333-10005, 33-22464, 33-29440, 33-51416, 33-68186, 33-58353, 33-58355, 33-60435, 33-21241) and on Form S-3 (File Nos. 33-61853, 333-15597) of our reports, dated February 27, 1997 on our audits of the consolidated financial statements and financial statement schedule of Genzyme Corporation, the combined financial statements and financial statement schedule of Genzyme General Division and the combined financial statements and financial statement schedule of Genzyme Tissue Repair Division as of December 31, 1996 and 1995, and for each of the three years in the period ended December 31, 1996, which reports are included in this Annual Report on Form 10-K. /s/ COOPERS & LYBRAND L.L.P. Boston, Massachusetts March 28, 1997