CLAIMSNET.COM INC.

                             1997 STOCK OPTION PLAN

                      AMENDMENT EFFECTIVE OCTOBER 20, 2000


         The Claimsnet.com inc. 1997 Stock Option Plan (the "Plan") is hereby
amended in the following particular only. Section III, "Stock Subject to The
Plan", shall be replaced in its entirety as follows.


III.     Stock Subject to The Plan.
         -------------------------

         The stock subject to this Plan shall be the Common Stock, presently
authorized but unissued or subsequently acquired by the Company. Subject to
adjustment as provided in Section 7 hereof, the aggregate amount of Common Stock
to be delivered upon the exercise of all options granted under the Plan shall
not exceed in the aggregate 1,307,692 shares as such Common Stock was
constituted on the effective date of the most recent Plan amendment, October 20,
2000. If any option granted under the Plan shall expire, be surrendered,
exchanged for another option, canceled, or terminated for any reason without
having been exercised in full, the unpurchased shares subject thereto shall
thereupon again be available for purposes of the Plan, including for replacement
options which may be granted in exchange for such surrendered, canceled, or
terminated options.