SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549





                                    FORM 8-K

                                 CURRENT REPORT

                         PURSUANT TO SECTION 13 OR 15(d)

                     OF THE SECURITIES EXCHANGE ACT OF 1934

         Date of Report (Date of earliest event reported): APRIL 2, 2003
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                                  BIOGEN, INC.
                                  ------------
             (Exact name of registrant as specified in its charter)




                                                        

     MASSACHUSETTS                  0-12042                       04-3002117
    (State or other               (Commission                 (IRS Employer
jurisdiction of incorporation      File Number)                 Identification No.)




                    14 CAMBRIDGE CENTER, CAMBRIDGE, MA 02142
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               (Address of principal executive offices) (Zip Code)


       Registrant's telephone number, including area code: (617) 679-2000
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ITEM  7. FINANCIAL STATEMENTS AND EXHIBITS.

      (c)   Exhibits.

      99.1  The Registrant's Press Release dated April 2, 2003.


ITEM  9. REGULATION FD DISCLOSURE (ALSO BEING FILED UNDER NEW ITEM 12.
         DISCLOSURE OF RESULTS OF OPERATIONS AND FINANCIAL CONDITION).

      The attached press release includes information with respect to the
Registrant's operating earnings and operating earnings per share, which are
non-GAAP financial measures. Management utilizes these non-GAAP financial
measures to gain an understanding of the comparative operating performance of
the Registrant. Management believes that these measures provide useful
information to investors regarding the Registrant's financial condition and
results of operations because they exclude non-operational and unusual
activities or transactions that are not necessarily relevant to an understanding
of the Registrant's business or the prospects for the Registrant's future
performance.

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                                   SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                         BIOGEN, INC.
                                         (Registrant)

Date: April 4, 2003                      /s/ Anne Marie Cook
                                         ---------------------------------------
                                         Anne Marie Cook
                                         Vice President, Chief Corporate Counsel

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                                  EXHIBIT INDEX



Exhibit
Number            Description
               

99.1              The Registrant's Press Release dated April 2, 2003.




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