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+--------+
| FORM 4 |                       U.S. SECURITIES AND EXCHANGE COMMISSION
+--------+                               WASHINGTON, D.C. 20549
[_] Check this box if
    no longer subject         STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
    to Section 16.
    Form 4 or Form 5       Filed pursuant to Section 16(a) of the Securities
    obligations may           Exchange Act of 1934, Section 17(a) of the
    continue. See            Public Utility Holding Company Act of 1935 or
    Instruction 1(b).      Section 30(f) of the Investment Company Act of 1940

(Print or Type Responses)

--------------------------------------------------------------------------------
1.  Name and Address of Reporting Person*

     Mello                          Joseph
--------------------------------------------------------------------------------
        (Last)                      (First)                        (Middle)

21250 Hawthorne Blvd., #800
--------------------------------------------------------------------------------
                                   (Street)

Torrance                              CA                              90503
--------------------------------------------------------------------------------
        (City)                      (State)                           (Zip)


2.  Issuer Name and Ticker or Trading Symbol      DaVita  (DVA)
                                             -----------------------------------

3.  IRS or Identification Number of Reporting Person if an entity
    (Voluntary)
                --------------

4.  Statement for Month/Year                5/01
                             ---------------------------------------------------

5.  If Amendment, Date of Original (Month/Year)
                                               ---------------------------------


6.  Relationship of Reporting Person(s) to Issuer (Check all applicable)


    [ ] Director    [X] Officer             [ ] 10% Owner    [ ] Other
                        (give title below)                       (specify below)

                 Chief Operating Officer
    ----------------------------------------------------------------

7.  Individual or Joint/Group Filing (Check Applicable Line)

    _X__ Form filed by One Reporting Person
    ____ Form filed by More than One Reporting Person

TABLE I--NON-DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
1. Title              2. Trans-  3. Trans-       4. Securities Acquired (A)        5. Amount of         6. Owner-     7. Nature
   of                    action     action          or Disposed of (D)                Securities           ship          of In-
   Security              Date       Code            (Instr. 3, 4 and 5)               Beneficially         Form:         direct
   (Instr. 3)            (Month/    (Instr. 8)                                        Owned at             Direct        Bene-
                         Day/    -----------------------------------------------      End of               (D) or        ficial
                         Year)                                                        Month                Indirect      Owner-
                                  Code       V   Amount        (A) or    Price        (Instr. 3 and 4)     (I)           ship
                                                               (D)                                         (Instr. 4)    (Instr. 4)
------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>        <C>         <C> <C>           <C>       <C>       <C>                  <C>           <C>

------------------------------------------------------------------------------------------------------------------------------------
Common Stock           05/14/01   M             30,000         A      $5.3125
------------------------------------------------------------------------------------------------------------------------------------
Common Stock           05/14/01   M             30,000         A      $5.4375
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Common Stock           05/14/01   S              9,086         D      $18.7435
------------------------------------------------------------------------------------------------------------------------------------
Common Stock           05/15/01   S             37,100         D      $18.7081
------------------------------------------------------------------------------------------------------------------------------------
Common Stock           05/16/01   S             13,814         D      $18.6596
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</TABLE>
Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.
* If this form is filed by more than one reporting person, see Instruction
  4(b)(v).
<PAGE>


FORM 4 (continued)

 TABLE II--DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
        (e.g., puts, calls, warrants, options, convertible securities)

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------------------------------
 1. Title of Derivative            2. Conver-          3. Trans-           4. Transac-            5. Number of Deriv-
    Security (Instr. 3)               sion or             action              tion Code              ative Securities
                                      Exercise            Date                (Instr. 8)             Acquired (A) or
                                      Price of            (Month/                                    Disposed of (D)
                                      Deriv-              Day/                                       (Instr. 3, 4, and 5)
                                      ative               Year)
                                      Security

                                                                           ---------------------------------------------------
                                                                           Code      V                 (A)         (D)

-----------------------------------------------------------------------------------------------------------------------------
<S>                                <C>                 <C>                 <C>       <C>          <C>              <C>
Stock Options
(right to buy)                      $5.3125             5/14/01             M                                       30,000
-----------------------------------------------------------------------------------------------------------------------------
Stock Options
(right to buy)                      $5.4375             5/14/01             M                                       30,000
-----------------------------------------------------------------------------------------------------------------------------

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</TABLE>

 TABLE II--DERIVATIVE SECURITIES ACQUIRED, DISPOSED OF, OR BENEFICIALLY OWNED
   (e.g., puts, calls, warrants, options, convertible securities)--CONTINUED
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                              6. Date Exer-     7. Title and Amount of       8. Price    9. Number       10. Owner-    11. Na-
                                 cisable and       Underlying Securities        of          of Deriv-        ship          ture
                                 Expiration        (Instr. 3 and 4)             Deriv-      ative            Form          of In-
                                 Date                                           ative       Secur-           of De-        direct
                                 (Month/Day/                                    Secur-      ities            rivative      Bene-
                                 Year)                                          ity         Bene-            Secu-         ficial
                                                                                (Instr.     ficially         rity:         Owner-
                               --------------------------------------------     5)          Owned            Direct        ship
                               Date     Expira-              Amount or                      at End           (D) or        (Instr.
                               Exer-    tion         Title   Number of                      of               Indi-         4)
                               cisable  Date                 Shares                         Month            rect (1)
                                                                                            (Instr. 4)       (Instr. 4)
------------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>       <C>     <C>          <C>             <C>         <C>             <C>           <C>
                                                  Common
                               (1)      6/15/05   Stock       30,000                      195,000              D
------------------------------------------------------------------------------------------------------------------------------------
                                                  Common
                               (2)      6/16/05   Stock       30,000                      195,000              D
------------------------------------------------------------------------------------------------------------------------------------

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</TABLE>

Explanation of Responses:

1.   The vesting of the indicated options was accelerated on 10/25/00 due to
DaVita's stock price closing at $10.1355 or above for 10 of 20 consecutive
trading days.
2.   The vesting of the indicated options was accelerated on 10/23/00 due to
DaVita's stock price closing at $9.9025 or above for 10 or 20 consecutive
trading days.


**  Intentional misstatements or omissions of facts constitute Federal Criminal
    Violations.
    See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note:  File three copies of this Form, one of which must be manually signed.
       If space provided is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained
in this form are not required to respond unless the form displays a currently
valid OMB Number.


                              /s/ Joseph Mello                     6/7/01
                              -------------------------------  -----------------
                              **Signature of Reporting Person        Date
