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                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------

                                  FORM 20-F/A

                                AMENDMENT NO. 1
[ ]   REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE
     SECURITIES EXCHANGE ACT OF 1934

                                       OR

[X]   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
     SECURITIES EXCHANGE ACT OF 1934
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 2001

                                       OR

[ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
     SECURITIES EXCHANGE ACT OF 1934

                        COMMISSION FILE NUMBER --------
                            ------------------------

                   FRESENIUS MEDICAL CARE AKTIENGESELLSCHAFT
             (Exact name of Registrant as specified in its charter)

                       FRESENIUS MEDICAL CARE CORPORATION
                (Translation of Registrant's name into English)

                                    GERMANY
                (Jurisdiction of incorporation or organization)

                            ------------------------

               ELSE-KRONER STRASSE 1, 61352 BAD HOMBURG, GERMANY
                    (Address of principal executive offices)

     SECURITIES REGISTERED OR TO BE REGISTERED PURSUANT TO SECTION 12(b) OF THE
ACT:

<Table>
<Caption>
    TITLE OF EACH CLASS                                     NAME OF EACH EXCHANGE ON WHICH REGISTERED
    -------------------                                     -----------------------------------------
    <S>                                                     <C>
    AMERICAN DEPOSITARY SHARES REPRESENTING PREFERENCE      NEW YORK STOCK EXCHANGE
    SHARES

    PREFERENCE SHARES, NO PAR VALUE                         NEW YORK STOCK EXCHANGE(1)

    AMERICAN DEPOSITARY SHARES REPRESENTING ORDINARY        NEW YORK STOCK EXCHANGE
    SHARES

    ORDINARY SHARES, NO PAR VALUE                           NEW YORK STOCK EXCHANGE(1)
</Table>

     SECURITIES REGISTERED OR TO BE REGISTERED PURSUANT TO SECTION 12(g) OF THE
ACT: None

    SECURITIES FOR WHICH THERE IS A REPORTING OBLIGATION PURSUANT TO SECTION
    15(d) OF THE ACT: 7 7/8% USD TRUST PREFERRED SECURITIES DUE 2008, 7 3/8% DM
    TRUST PREFERRED SECURITIES DUE 2008, 7 7/8% USD TRUST PREFERRED SECURITIES
    DUE 2011, 7 3/8% EURO TRUST PREFERRED SECURITIES DUE 2011
------------------

(1) Not for trading, but only in connection with the registration of American
    Depositary Shares representing such shares.

     Indicate the number of outstanding shares of each of the issuer's classes
of capital or common stock as of the close of the period covered by the annual
report:

     Preference Shares, no par value 26,176,508

     Ordinary Shares, no par value 70,000,000

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports) and (2) has been subject to such
filing requirements for the past 90 days.

                               Yes [X]     No [ ]

     Indicate by check mark which financial statement item the registrant has
elected to follow.

                          Item 17 [ ]     Item 18 [X]
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     The registrant hereby amends its annual report on Form 20F filed April 3,
2002 in the following respects:

                                    PART III

ITEM 19.  EXHIBITS

10.1 Consent of KPMG Deutsche Treuhand-Gesellschaft Aktiengesellschaft
Wirtschaftsprufungsgesellschaft.

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                                   SIGNATURES

     The Registrant hereby certifies that it meets all of the requirements for
filing on Form 20-F and that it has duly caused and authorized the undersigned
to sign this annual report on its behalf.

     DATE: April 9, 2002

                                      FRESENIUS MEDICAL CARE
                                      AKTIENGESELLSCHAFT

                                          /s/ DR. BEN LIPPS
                                      By:
                                      ------------------------------------------

                                         Name: Dr. Ben Lipps
                                         Title:  Chairman of the Management
                                          Board

                                          /s/ DR. ULF M. SCHNEIDER
                                      By:
                                      ------------------------------------------

                                         Name: Dr. Ulf M. Schneider
                                         Title:  Chief Financial Officer

                                        2