WASHINGTON, D.C. 20549

                                 SCHEDULE 13G/A


                                AMENDMENT NO. 16*

                               CERNER CORPORATION
                                (Name of Issuer)

                                  COMMON STOCK
                         (Title of Class of Securities)

                                 (CUSIP Number)

                                DECEMBER 31, 2001
             (Date of Event Which Requires Filing of this Statement)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities and Exchange Act
of 1934 ("Act") or otherwise subject to the liabilities of that section of the
Act but shall be subject to all other provisions of the Act (however, see the

                                 SCHEDULE 13G/A
                          FILED PURSUANT TO RULE 13d-7

Item 1(a):        Name of Issuer:

                           Cerner Corporation

Item 1(b):        Name of Issuer's Principal Executive Offices:

                           2800 Rockcreek Parkway, 601
                           Kansas City, MO  64117

Item 2(a):        Name of Person Filing:

                           Clifford W. Illig

Item 2(b):        Address or Principal Business Office or, if None, Residence:

                           (i)-(ii) 2800 Rockcreek Parkway, Suite 601
                                     Kansas City, MO 64117

Item 2(c):        Citizenship:

                           United States

Item 2(d):        Title of Class of Securities:

                           Common Stock

Item 2(e):        CUSIP Number:


Item 3: If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b),
check whether the person filing is a:

                           Not Applicable.

Item 4:           Ownership

                           (a)      Amount Beneficially Owned:                                               3,111,631*

                           (b)      Percent of Class:                                                             8.78%

                           (c)      Number of Shares as to which such person has:

                                    (i)      sole power to vote or to direct the vote:                       3,049,538*

                                    (ii)     shared power to vote or to direct the vote:                        62,093

                                    (iii)    sole power to dispose or to direct the disposition of:          3,049,538*

                                    (iv)     shared power to dispose or to direct the disposition of:           62,093

                                             * Such number of shares includes
                                             195,667 shares held by Bonne Illig,
                                             wife of Clifford W. Illig, as
                                             trustee for their minor children.

Item 5:           Ownership of Five Percent or Less of a Class.

                           If this statement is being filed to report the fact
                           that as of the date hereof, the reporting person has
                           ceased to be the beneficial owner of more than five
                           percent of the class of securities, check the
                           following ( ).

Item 6:           Ownership of More than Five Percent on Behalf of Another

                           Shares (constituting a portion of the number of
                           shares reported under Item 4) are held on behalf of
                           Clifford W. Illig by a trustee under the Cerner
                           Corporation Employee Stock Purchase Retirement Plan,
                           the trustee receives the dividends pursuant to the
                           terms of the plan.

Item 7:           Identification and Classification of the Subsidiary Which
                  Acquired the Security Being Reported on By the Parent Holding

                           Not Applicable.

Item 8:           Identification and Classification of Members of the Group.

                           Not Applicable.

Item 9:           Notice of Dissolution of Group.

                           Not Applicable.

Item 10:          Certification

                           Not Applicable.


                  After reasonable inquiry and to the best of my knowledge and
                  belief, I certify that the information set forth in this
                  statement is true, complete and correct.

   Clifford W. Illig
   Vice Chairman

   February 14, 2002