EXHIBIT 23.1

  CONSENT OF INDEPENDENT ACCOUNTANTS

  We hereby consent to the incorporation by reference in the
Registration Statements on Form S-8 (Nos. 33-50480, 33-85330, 33-97176,
333-33891 and 333-80663) of Regeneron Pharmaceuticals, Inc. of our
report, which is based in part on the report of other auditors, dated
February 8, 2000 relating to the financial statements, which appears in
this Form 10-K.

                    PricewaterhouseCoopers LLP

New York, New York
March 3, 2000