Claimsnet.com inc.

                             1997 STOCK OPTION PLAN

                              Adopted April 5, 1997

I.    Purpose.

      The purpose of the claimsnet.com, inc. 1997 Stock Option Plan (the "Plan")
is to provide a means whereby selected employees, officers, directors, and
consultants of claimsnet.com, inc., a Delaware corporation (the "Company"), or
of any parent or subsidiary (as defined in subsection 5.7 hereof and referred to
hereinafter as "Affiliates") thereof, may be granted incentive stock options
and/or nonqualified stock options to purchase shares of common stock, $.10 par
value (the "Common Stock") in order to attract and retain the services or advice
of such employees, officers, directors, and consultants and to provide
additional incentive for such persons to exert maximum efforts for the success
of the Company and its Affiliates by encouraging stock ownership in the Company.

II.   Administration.

      Subject to Section 2.3 hereof, the Plan shall be administered by the Board
of Directors of the Company (the "Board") or, in the event the Board shall
appoint and/or authorize a committee of two or more members of the Board to
administer the Plan, by such committee. The administrator of the Plan shall
hereinafter be referred to as the "Plan Administrator."

      The foregoing notwithstanding, in the event the Company shall register any
of its equity securities pursuant to Section 12(b) or 12(g) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and any directors are
eligible to receive options under the Plan, then with respect to grants to be
made to directors: (a) the Plan Administrator shall be constituted so as to meet
the requirements of Section 16(b) of the Exchange Act and Rule 16b-3 thereunder,
each as amended from time to time, or (b) if the Plan Administrator cannot be so
constituted, no options shall be granted under the Plan to any directors.

      Section 2.1 Procedures. The Board shall designate one of the members of
the Plan Administrator as chairman. The Plan Administrator may hold meetings at
such times and places as it shall determine. The acts of a majority of the
members of the Plan Administrator present at meetings at which a quorum exists,
or acts approved in writing by all Plan Administrator members, shall be valid
acts of the Plan Administrator.

      Section 2.2 Responsibilities. Except for the terms and conditions
explicitly set forth herein, the Plan Administrator shall have the authority, in
its discretion, to determine all matters relating to the options to be granted
under the Plan, including, without limitation, selection of whether an option
will be an incentive stock option or a nonqualified stock option, selection of
the individuals to be granted options, the number of shares to be subject to
each option, the exercise

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price per share, the timing of grants and all other terms and conditions of the
options. Grants under the Plan need not be identical in any respect, even when
made simultaneously. The Plan Administrator may also establish, amend, and
revoke rules and regulations for the administration of the Plan. The
interpretation and construction by the Plan Administrator of any terms or
provisions of the Plan or any option issued hereunder, or of any rule or
regulation promulgated in connection herewith, shall be conclusive and binding
on all interested parties, so long as such interpretation and construction with
respect to incentive stock options corresponds to the requirements of Internal
Revenue Code of 1986, as amended (the "Code") Section 422, the regulations
thereunder, and any amendments thereto. The Plan Administrator shall not be
personally liable for any action made in good faith with respect to the Plan or
any option granted thereunder.

            2.3 Rule 16b-3 and Section 16(b) Compliance; Bifurcation of Plan. It
is the intention of the Company that the Plan comply in all respects with Rule
16b-3 under the Exchange Act to the extent applicable, and in all events the
Plan shall be construed in favor of its meeting the requirements of Rule 16b-3.
If any Plan provision is later found not to be in compliance with such Rule,
such provision shall be deemed null and void. The Board of Directors may act
under the Plan only if all members thereof are "disinterested persons" as
defined in Rule 16b-3 and further described in Section 4 hereof; and from and
after the date that the Company first registers a class of equity securities
under Section 12 of the Exchange Act, no director or officer or other Company
"insider" subject to Section 16 of the Exchange Act may sell shares received
upon the exercise of an option during the six month period immediately following
the grant of the option. Notwithstanding anything in the Plan to the contrary,
the Board, in its absolute discretion, may bifurcate the Plan so as to restrict,
limit, or condition the use of any provision of the Plan to participants who are
officers and directors or other persons subject to Section 16(b) of the Exchange
Act without so restricting, limiting, or conditioning the Plan with respect to
other participants.

      SECTION 3. 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 600,000 shares
as such Common Stock was constituted on the effective date of the Plan. 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.

      SECTION 4. Eligibility. An incentive stock option may be granted only to
any individual who, at the time the option is granted, is an employee of the
Company or any Affiliate thereof. A nonqualified stock option may be granted to
any employee, officer, director, or consultant of the Company or any Affiliate
thereof, whether an individual or an entity. Any party to whom an option is
granted under the Plan shall be referred to hereinafter as an "Optionee."

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            A director shall in no event be eligible for the benefits of the
Plan unless at the time discretion is exercised in the selection of a director
as a person to whom options may be granted, or in the determination of the
number of shares which may be covered by options granted to the director: (a)
the Board of Directors has delegated its discretionary authority over the Plan
to a committee consisting solely of "disinterested persons" (as defined below)
or (b) the Plan otherwise complies with the requirements of Rule 16b-3 under the
Exchange Act. For purposes of this paragraph, a "disinterested person" shall
mean a director (i) who was not during the one year prior to service as Plan
Administrator granted or awarded equity securities pursuant to the Plan or any
other plan of the Company or its Affiliates entitling the participants therein
to acquire equity securities of the Company or its Affiliates except as
permitted by Rule 16b-3(c)(2)(i), or (ii) who is otherwise considered to be a
"disinterested person" in accordance with such Rule 16b-3(c)(2)(i) or any other
applicable rules, regulations, or interpretations of the Securities and Exchange
Commission.

      SECTION 5. Terms and Conditions of Options. Options granted under the Plan
shall be evidenced by written agreements which shall contain such terms,
conditions, limitations, and restrictions as the Plan Administrator shall deem
advisable and which are not inconsistent with the Plan. Notwithstanding the
foregoing, options shall include or incorporate by reference the following terms
and conditions:

            5.1 Number of Shares and Price. The maximum number of shares that
may be purchased pursuant to the exercise of each option, and the price per
share at which such option is exercisable (the "exercise price"), shall be as
established by the Plan Administrator; provided, that the Plan Administrator
shall act in good faith to establish the exercise price which shall be not less
than 100% of the fair market value per share of the Common Stock at the time of
grant of the option with respect to incentive stock options; and provided,
further, that, with respect to incentive stock options granted to greater than
ten percent stockholders, the exercise price shall be as required by Section 6
hereof.

            5.2 Term and Maturity. Subject to the restrictions contained in
Section 6 hereof with respect to granting stock options to greater than ten
percent stockholders, the term of each stock option shall be as established by
the Plan Administrator and, if not so established, shall be ten years from the
date of its grant, but in no event shall the term of any incentive stock option
exceed a ten year period. To ensure that the Company or Affiliate will achieve
the purpose and receive the benefits contemplated in the Plan, any option
granted to any Optionee hereunder shall, unless the condition of this sentence
is waived or modified in the agreement evidencing the option or by resolution
adopted by the Plan Administrator, be exercisable according to the following
schedule:


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            Period of Optionee's
            Continuous Relationship
            With the Company or
            Affiliate From the Date       Portion of Total Option
            the Option is Granted         Which is Exercisable
            ---------------------         --------------------

                  1 year                        25%
                  2 years                       50%
                  3 years                       75%
                  4 years                       100%

            5.3 Exercise. Subject to the vesting schedule described in
subsection 5.2 hereof, each option may be exercised in whole or in part;
provided, that only whole shares may be issued pursuant to the exercise of any
option. Subject to any other terms and conditions herein, the Plan Administrator
may provide that an option may not be exercised in whole or in part for a stated
period or periods of time during which such option is outstanding; provided,
that the Plan Administrator may rescind, modify, or waive any such limitation at
any time and from time to time after the grant date thereof. During an
Optionee's lifetime, any incentive stock options granted under the Plan are
personal to such Optionee and are exercisable solely by such Optionee. Options
shall be exercised by delivery to the Company of notice of the number of shares
with respect to which the option is exercised, together with payment of the
exercise price in accordance with Section 5.4 hereof.

            5.4 Payment of Exercise Price. Payment of the option exercise price
shall be made in full at the time the notice of exercise of the option is
delivered to the Company and shall be in cash, bank certified or cashier's
check, or personal check (unless at the time of exercise the Plan Administrator
in a particular case determines not to accept a personal check) for shares of
Common Stock being purchased.

            The Plan Administrator can determine at the time the option is
granted in the case of incentive stock options, or at any time before exercise
in the case of nonqualified stock options, that additional forms of payment will
be permitted. To the extent permitted by the Plan Administrator and applicable
laws and regulations (including, without limitation, federal tax and securities
laws and regulations and state corporate law), an option may be exercised by:

            (a) delivery of shares of Common Stock of the Company held by an
Optionee having a fair market value equal to the exercise price, such fair
market value to be determined in good faith by the Plan Administrator;

            (b) delivery of a properly executed Notice of Exercise, together
with irrevocable instructions to a broker, all in accordance with the
regulations of the Federal Reserve Board, to promptly deliver to the Company the
amount of sale or loan proceeds to pay the exercise price and

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any federal, state, or local withholding tax obligations that may arise in
connection with the exercise;

            (c) delivery of a properly executed Notice of Exercise, together
with instructions to the Company to withhold from the shares of Common Stock
that would otherwise be issued upon exercise that number of shares of Common
Stock having a fair market value equal to the option exercise price.

            5.5 Withholding Tax Requirement. The Company or any Affiliate
thereof shall have the right to retain and withhold from any payment of cash or
Common Stock under the Plan the amount of taxes required by any government to be
withheld or otherwise deducted and paid with respect to such payment. No option
may be exercised unless and until arrangements satisfactory to the Company, in
its sole discretion, to pay such withholding taxes are made. At its discretion,
the Company may require an Optionee to reimburse the Company for any such taxes
required to be withheld by the Company and withhold any distribution in whole or
in part until the Company is so reimbursed. In lieu thereof, the Company shall
have the right to withhold from any other cash amounts due or to become due from
the Company to the Optionee an amount equal to such taxes or retain and withhold
a number of shares having a market value not less than the amount of such taxes
required to be withheld by the Company to reimburse the Company for any such
taxes and cancel (in whole or in part) any such shares of Common Stock so
withheld. If required by Section 16(b) of the Exchange Act, the election to pay
withholding taxes by delivery of shares of Common Stock held by any person who
at the time of exercise is subject to Section 16(b) of the Exchange Act shall be
made either six months prior to the date the option exercise becomes taxable or
at such other times as the Company may determine as necessary to comply with
Section 16(b) of the Exchange Act. Although the Company may, in its discretion,
accept Common Stock as payment of withholding taxes, the Company shall not be
obligated to do so.

            5.6   Nontransferability.

                  5.6.1 Option. Options granted under the Plan and the rights
and privileges conferred hereby may not be transferred, assigned, pledged, or
hypothecated in any manner (whether by operation of law or otherwise) other than
by will or by the applicable laws of descent and distribution or pursuant to a
qualified domestic relations order as defined in Section 414(p) of the Code, or
Title I of the Employee Retirement Income Security Act of 1974, as amended, or
the rules thereunder, and shall not be subject to execution, attachment, or
similar process. Any attempt to transfer, assign, pledge, hypothecate, or
otherwise dispose of any option under the Plan or of any right or privilege
conferred hereby, contrary to the Code or to the provisions of the Plan, or the
sale or levy or any attachment or similar process upon the rights and privileges
conferred hereby shall be null and void ab initio. The designation by an
Optionee of a beneficiary does not, in and of itself, constitute an
impermissible transfer under this subsection 5.6.1.

                  5.6.2 Stock. The Plan Administrator may provide in the
agreement granting the option that (a) the Optionee may not transfer or
otherwise dispose of shares acquired upon

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exercise of an option without first offering such shares to the Company for
purchase on the same terms and conditions as those offered to the proposed
transferee or (b) upon termination of employment of an Optionee the Company
shall have a six month right of repurchase as to the shares acquired upon
exercise, which right of repurchase shall allow for a maximum purchase price
equal to the fair market value of the shares on the termination date. The
foregoing rights of the Company shall be assignable by the Company upon
reasonable written notice to the Optionee.

            5.7 Termination of Relationship. If the Optionee's relationship with
the Company or any Affiliate thereof ceases for any reason other than
termination for cause, death, or total disability, and unless by its terms the
option sooner terminates or expires, then the Optionee may exercise, for a three
month period, that portion of the Optionee's option which is exercisable at the
time of such cessation, but the Optionee's option shall terminate at the end of
the three month period following such cessation as to all shares for which it
has not theretofore been exercised, unless, in the case of a nonqualified stock
option, such provision is waived in the agreement evidencing the option or by
resolution adopted by the Plan Administrator within 90 days of such cessation.
If, in the case of an incentive stock option, an Optionee's relationship with
the Company or Affiliate thereof changes from employee to nonemployee (i.e.,
from employee to a position such as a consultant), such change shall constitute
a termination of an Optionee's employment with the Company or Affiliate and the
Optionee's incentive stock option shall terminate in accordance with this
subsection 5.7.

            If an Optionee is terminated for cause, any option granted hereunder
shall automatically terminate as of the first discovery by the Company of any
reason for termination for cause, and such Optionee shall thereupon have no
right to purchase any shares pursuant to such option. "Termination for cause"
shall mean dismissal for dishonesty, conviction or confession of a crime
punishable by law (except minor violations), fraud, misconduct, or disclosure of
confidential information. If an Optionee's relationship with the Company or any
Affiliate thereof is suspended pending an investigation of whether or not the
Optionee shall be terminated for cause, all Optionee's rights under any option
granted hereunder likewise shall be suspended during the period of
investigation.

            If an Optionee's relationship with the Company or any Affiliate
thereof ceases because of a total disability, the Optionee's option shall not
terminate or, in the case of an incentive stock option, cease to be treated as
an incentive stock option until the end of the 12 month period following such
cessation (unless by its terms it sooner terminates and expires). As used in the
Plan, the term "total disability" refers to a mental or physical impairment of
the Optionee which is expected to result in death or which has lasted or is, in
the opinion of the Company and two independent physicians, expected to last for
a continuous period of 12 months or more and which causes or is, in such
opinion, expected to cause the Optionee to be unable to perform his or her
duties for the Company and to be engaged in any substantial gainful activity.
Total disability shall be deemed to have occurred on the first day after the
Company and the two independent physicians have furnished their opinion of total
disability to the Plan Administrator.


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            For purposes of this subsection 5.7, a transfer of relationship
between or among the Company and/or any Affiliate thereof shall not be deemed to
constitute a cessation of relationship with the Company or any of its
Affiliates. For purposes of this subsection 5.7, with respect to incentive stock
options, employment shall be deemed to continue while the Optionee is on
military leave, sick leave, or other bona fide leave of absence (as determined
by the Plan Administrator). The foregoing notwithstanding, employment shall not
be deemed to continue beyond the first 90 days of such leave, unless the
Optionee's reemployment rights are guaranteed by statute or by contract.

            As used herein, the term "Affiliate" shall be defined as follows:
(a) when referring to a subsidiary corporation, "Affiliate" shall mean any
corporation (other than the Company) in, at the time of the granting of the
option, an unbroken chain of corporations ending with the Company, if stock
possessing 50% or more of the total combined voting power of all classes of
stock of each of the corporations other than the Company is owned by one of the
other corporations in such chain; and (b) when referring to a parent
corporation, "Affiliate" shall mean any corporation in an unbroken chain of
corporations ending with the Company if, at the time of the granting of the
option, each of the corporations other than the Company owns stock possessing
50% or more of the total combined voting power of all classes of stock in one of
the other corporations in such chain.

            5.8 Death of Optionee. If an Optionee dies while he or she has a
relationship with the Company or any Affiliate thereof or within the three month
period (or 12 month period in the case of totally disabled Optionees) following
cessation of such relationship, any option held by such Optionee, to the extent
that the Optionee would have been entitled to exercise such option, may be
exercised within one year after his or her death by the personal representative
of his or her estate or by the person or persons to whom the Optionee's rights
under the option shall pass by will or by the applicable laws of descent and
distribution.

            5.9 Status of Stockholder. Neither the Optionee nor any party to
which the Optionee's rights and privileges under the option may pass shall be,
or have any of the rights or privileges of, a stockholder of the Company with
respect to any of the shares issuable upon the exercise of any option granted
under the Plan unless and until such option has been exercised.

            5.10 Continuation of Employment. Nothing in the Plan or in any
option granted pursuant to the Plan shall confer upon any Optionee any right to
continue in the employ of the Company or of an Affiliate thereof, or to continue
to be engaged as a consultant to the Company or such Affiliate, or to interfere
in any way with the right of the Company or of any such Affiliate to terminate
his or her employment or other relationship with the Company at any time.

            5.11 Modification and Amendment of Option. Subject to the
requirements of Section 422 of the Code with respect to incentive stock options
and to the terms and conditions and within the limitations of the Plan,
including, without limitation, Section 9.1 hereof, the Plan Administrator may
modify or amend outstanding options granted under the Plan. The modification

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or amendment of an outstanding option shall not, without the consent of the
Optionee, impair or diminish any of his or her rights or any of the obligations
of the Company under such option. Except as otherwise provided herein, no
outstanding option shall be terminated without the consent of the Optionee.
Unless the Optionee agrees otherwise, any changes or adjustments made to
outstanding incentive stock options granted under the Plan shall be made in such
a manner so as not to constitute a "modification" as defined in Section 424(h)
of the Code and so as not to cause any incentive stock option issued hereunder
to fail to continue to qualify as an incentive stock option as defined in
Section 422(b) of the Code.

            5.12 Limitation on Value for Incentive Stock Options. As to all
incentive stock options granted under the terms of the Plan, to the extent that
the aggregate fair market value (determined at the time of the grant of the
incentive stock option) of the shares of Common Stock with respect to which
incentive stock options are exercisable for the first time by the Optionee
during any calendar year (under the Plan and all other incentive stock option
plans of the Company, an Affiliate thereof or a predecessor corporation) exceeds
$100,000, such options shall be treated as nonqualified stock options. The
foregoing sentence shall not apply, and the limitation shall be that provided by
the Code or the Internal Revenue Service, as the case may be, if such annual
limit is changed or eliminated by (a) amendment of the Code or (b) issuance by
the Internal Revenue Service of (i) a Revenue ruling, (ii) a Private Letter
ruling to any of the Company, any Optionee, or any legatee, personal
representative, or distributee of any Optionee, or (iii) regulations.

            5.13  Valuation of Common Stock Received Upon Exercise.

                  5.13.1 Exercise of Options Under Sections 5.4(a) and (c). The
value of Common Stock received by the Optionee from an exercise under Sections
5.4(a) and 5.4(c) hereof shall be the fair market value as determined by the
Plan Administrator, provided, that if the Common Stock is traded in a public
market, such valuation shall be the average of the high and low trading prices
or bid and asked prices, as applicable, of the Common Stock for the date of
receipt by the Company of the Optionee's delivery of shares under Section 5.4(a)
hereof or delivery of the Notice of Exercise under Section 5.4(c) hereof,
determined as of the trading day immediately preceding such date (or, if no sale
of shares is reported for such trading day, on the next preceding day on which
any sale shall have been reported).

                  5.13.2 Exercise of Option Under Section 5.4(b). The value of
Common Stock received by the Optionee from an exercise under Section 5.4(b)
hereof shall equal the sales price received for such shares.

      SECTION 6. Greater Than Ten Percent Stockholders.

            6.1 Exercise Price and Term of Incentive Stock Options. If incentive
stock options are granted under the Plan to employees who, at the time of such
grant, own greater than ten percent of the total combined voting power of all
classes of stock of the Company or any Affiliate thereof, the term of such
incentive stock options shall not exceed five years and the

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exercise price shall be not less than 110% of the fair market value of the
Common Stock at the time of grant of the incentive stock option. This provision
shall control notwithstanding any contrary terms contained in an option
agreement or any other document. The term and exercise price limitations of this
provision shall be amended to conform to any change required by a change in the
Code or by ruling or pronouncement of the Internal Revenue Service.

            6.2 Attribution Rule. For purposes of subsection 6.1, in determining
stock ownership, an employee shall be deemed to own the stock owned, directly or
indirectly, by or for his or her brothers, sisters, spouse, ancestors, and
lineal descendants. Stock owned, directly or indirectly, by or for a
corporation, partnership estate, or trust shall be deemed to be owned
proportionately by or for its stockholders, partners, or beneficiaries. If an
employee or a person related to the employee owns an unexercised option or
warrant to purchase stock of the Company, the stock subject to that portion of
the option or warrant which is unexercised shall not be counted in determining
stock ownership. For purposes of this Section 6, stock owned by an employee
shall include all stock owned by him or her which is actually issued and
outstanding immediately before the grant of the incentive stock option to the
employee.

      SECTION 7. Adjustments Upon Changes in Capitalization. The aggregate
number and class of shares for which options may be granted under the Plan, the
number and class of shares covered by each outstanding option, and the exercise
price per share thereof (but not the total price), and each such option, shall
all be proportionately adjusted for any increase or decrease in the number of
issued shares of Common Stock of the Company resulting from a split or
consolidation of shares or any like capital adjustment, or the payment of any
stock dividend.

            7.1.  Effect of Liquidation, Reorganization, or Change in Control.

                  7.1.1 Cash, Stock, or Other Property for Stock. Except as
provided in subsection 7.1.2 hereof, upon a merger (other than a merger of the
Company in which the holders of Common Stock immediately prior to the merger
have the same proportionate ownership of common stock in the surviving
corporation immediately after the merger), consolidation, acquisition of
property or stock, separation, reorganization (other than mere reincorporation
or creation of a holding company), or liquidation of the Company (each, an
"event"), as a result of which the stockholders of the Company receive cash,
stock, or other property in exchange for, or in connection with, their shares of
Common Stock, any option granted hereunder shall terminate, but the time during
which such options may be exercised shall be accelerated as follows: the
Optionee shall have the right immediately prior to any such event to exercise
such Optionee's option in whole or in part whether or not the vesting
requirements set forth in the option agreement have been satisfied.

                  7.1.2 Conversion of Options on Stock for Exchange Stock. If
the stockholders of the Company receive capital stock of another corporation
("Exchange Stock") in exchange for their shares of Common Stock in any
transaction involving a merger (other than a merger of the Company in which the
holders of Common Stock immediately prior to the merger

                                      - 9 -


have the same proportionate ownership of common stock in the surviving
corporation immediately after the merger), consolidation, acquisition of
property or stock, separation, or reorganization (other than mere
reincorporation or creation of a holding company), all options granted hereunder
shall be converted into options to purchase shares of Exchange Stock unless the
Company and corporation issuing the Exchange Stock, in their sole discretion,
determine that any or all such options granted hereunder shall not be converted
into options to purchase shares of Exchange Stock but instead shall terminate in
accordance with the provisions of subsection 7.1.1 hereof. The amount and price
of converted options shall be determined by adjusting the amount and price of
the options granted hereunder in the same proportion as used for determining the
number of shares of Exchange Stock the holders of the Common Stock receive in
such merger, consolidation, acquisition, separation, or reorganization. Unless
the Board determines otherwise, the converted options shall be fully vested
whether or not the vesting requirements set forth in the option agreement have
been satisfied.

            7.2 Fractional Shares. In the event of any adjustment in the number
of shares covered by an option, any fractional shares resulting from such
adjustment shall be disregarded and each such option shall cover only the number
of full shares resulting from such adjustment.

            7.3 Determination of Board to Be Final. Except as otherwise required
for the Plan to qualify for the exemption afforded by Rule 16b-3 under the
Exchange Act, all adjustments under this Section 7 shall be made by the Board,
and its determination as to what adjustments shall be made, and the extent
thereof, shall be final, binding, and conclusive. Unless an Optionee agrees
otherwise, any change or adjustment to an incentive stock option shall be made
in such a manner so as not to constitute a "modification" as defined in Section
425(h) of the Code and so as not to cause the incentive stock option issued
hereunder to fail to continue to qualify as an incentive stock option as defined
in Section 422(b) of the Code.

      SECTION 8. Securities Law Compliance. Shares shall not be issued with
respect to an option granted under the Plan unless the exercise of such option
and the issuance and delivery of such shares pursuant thereto shall comply with
all relevant provisions of law, including, without limitation, any applicable
state securities laws, the Securities Act of 1933, as amended (the "Act"), the
Exchange Act, the rules and regulations promulgated thereunder, and the
requirements of any stock exchange upon which the shares may then be listed, and
shall be further subject to the approval of counsel for the Company with respect
to such compliance, including, without limitation, the availability of an
exemption from registration for the issuance and sale of any shares hereunder.
Inability of the Company to obtain from any regulatory body having jurisdiction,
the authority deemed by the Company's counsel to be necessary for the lawful
issuance and sale of any shares hereunder or the unavailability of an exemption
from registration for the issuance and sale of any shares hereunder shall
relieve the Company of any liability in respect of the nonissuance or sale of
such shares as to which such requisite authority shall not have been obtained.

      As a condition to the exercise of an option, if, in the opinion of counsel
for the Company, assurances are required by any relevant provision of the
aforementioned laws, the Company may

                                     - 10 -


require the Optionee to give written assurances satisfactory to the Company at
the time of any such exercise (a) as to the Optionee's knowledge and experience
in financial and business matters (and/or to employ a purchaser representative
reasonably satisfactory to the Company who is knowledgeable and experienced in
financial and business matters) and that such Optionee is capable of evaluating,
either alone or with the purchaser representative, the merits and risks of
exercising the option or (b) that the shares are being purchased only for
investment and without any present intention to sell or distribute such shares.
The foregoing requirements shall be inoperative if the issuance of the shares
upon the exercise of the option has been registered under a then currently
effective registration statement under the Act.

      At the option of the Company, a stop-transfer order against any shares may
be placed on the official stock books and records of the Company, and a legend
indicating that the stock may not be pledged, sold, or otherwise transferred
unless an opinion of counsel is provided (concurred in by counsel for the
Company) stating that such transfer is not in violation of any applicable law or
regulation, may be stamped on stock certificates in order to assure exemption
from registration. The Plan Administrator may also require such other action or
agreement by the Optionees as may from time to time be necessary to comply with
the federal and state securities laws. NONE OF THE ABOVE SHALL BE CONSTRUED TO
IMPLY AN OBLIGATION ON THE PART OF THE COMPANY TO UNDERTAKE REGISTRATION OF THE
OPTIONS OR STOCK HEREUNDER.

      Should any of the Company's capital stock of the same class as the stock
subject to options granted hereunder be listed on a national securities exchange
or on the NASDAQ National Market, all stock issued hereunder if not previously
listed on such exchange or market shall, if required by the rules of such
exchange or market, be authorized by that exchange or market for listing thereon
prior to the issuance thereof.

      SECTION 9. Use of Proceeds. The proceeds received by the Company from the
sale of shares pursuant to the exercise of options granted hereunder shall
constitute general funds of the Company.

      SECTION 10.  Amendment and Termination.

            10.1 Board Action. The Board may at any time suspend, amend, or
terminate the Plan, provided, that no amendment shall be made without
stockholder approval within 12 months before or after adoption of the Plan if
such approval is necessary to comply with any applicable tax or regulatory
requirement, including any such approval as may be necessary to satisfy the
requirements for exemptive relief under Rule 16b-3 of the Exchange Act or any
successor provision. Rights and obligations under any option granted before
amendment of the Plan shall not be altered or impaired by any amendment of the
Plan unless the Company requests the consent of the person to whom the option
was granted and such person consents in writing thereto.


                                     - 11 -


            10.2 Automatic Termination. Unless sooner terminated by the Board,
the Plan shall terminate ten years from the earlier of (a) the date on which the
Plan is adopted by the Board or (b) the date on which the Plan is approved by
the stockholders of the Company. No option may be granted after such termination
or during any suspension of the Plan. The amendment or termination of the Plan
shall not, without the consent of the option holder, alter or impair any rights
or obligations under any option theretofore granted under the Plan.

      SECTION 11. Effectiveness of the Plan. The Plan shall become effective
upon adoption by the Board so long as it is approved by the holders of a
majority of the Company's outstanding shares of voting capital stock at any time
within 12 months before or after the adoption of the Plan by the Board.



                                     - 12 -



                          claimsnet.com, inc.

           [INCENTIVE][NONQUALIFIED] STOCK OPTION LETTER AGREEMENT

TO: ______________________

      We are pleased to inform you that you have been selected by the Plan
Administrator of the claimsnet.com, inc. (the "Company") 1997 Stock Option Plan
(the "Plan") to receive a(n) [incentive] [nonqualified] option for the purchase
of ________ shares of the Company's common stock, $.10 par value, at an exercise
price of $____ per share (the "exercise price"). A copy of the Plan is attached
and the provisions thereof, including, without limitation, those relating to
withholding taxes, are incorporated into this Agreement by reference.

      The terms of the option are as set forth in the Plan and in this
Agreement. The most important of the terms set forth in the Plan are summarized
as follows:

      Term. The term of the option is ten years from date of grant, unless
sooner terminated.

      Exercise. During your lifetime only you can exercise the option. The Plan
also provides for exercise of the option by the personal representative of your
estate or the beneficiary thereof following your death. You may use the Notice
of Exercise in the form attached to this Agreement when you exercise the option.

      Payment for Shares.  The option may be exercised by the delivery of:

      (a) Cash, personal check (unless at the time of exercise the Plan
Administrator determines otherwise), or bank certified or cashier's checks;

      (b) Unless the Plan Administrator in its sole discretion determines
otherwise, shares of the capital stock of the Company held by you having a fair
market value at the time of exercise, as determined in good faith by the Plan
Administrator, equal to the exercise price;

      (c) Unless the Plan Administrator in its sole discretion determines
otherwise, a properly executed Notice of Exercise, together with instructions to
the Company to withhold from the shares that would otherwise be issued upon
exercise that number of shares having a fair market value equal to the option
exercise price; or

      (d) Unless the Plan Administrator in its sole discretion determines
otherwise, a properly executed Notice of Exercise, together with irrevocable
instructions to a broker to promptly deliver to the Company the amount of sale
or loan proceeds to pay the exercise price.

      Termination. The option will terminate immediately upon termination for
cause, as defined in the Plan, or three months after cessation of your
relationship with the Company or an Affiliate

                                      - 1 -


thereof, unless cessation is due to death or total disability, in which case the
option shall terminate 12 months after cessation of such relationship.

      Transfer of Option. The option is not transferable except by will or by
the applicable laws of descent and distribution or pursuant to a qualified
domestic relations order.

      Vesting.  The option is vested according to the following schedule:

            Period of Optionee's
            Continuous Relationship
            With the Company or
            Affiliate From the Date       Portion of Total Option
            the Option is Granted         Which is Exercisable
            ---------------------         --------------------

                  1 year                          25%
                  2 years                         50%
                  3 years                         75%
                  4 years                         100%

      Date of Grant.  The date of grant of the option is _______________.

      YOUR PARTICULAR ATTENTION IS DIRECTED TO SECTION 8 OF THE PLAN WHICH
DESCRIBES CERTAIN IMPORTANT CONDITIONS RELATING TO FEDERAL AND STATE SECURITIES
LAWS THAT MUST BE SATISFIED BEFORE THE OPTION CAN BE EXERCISED AND BEFORE THE
COMPANY CAN ISSUE ANY SHARES TO YOU. THE COMPANY HAS NO OBLIGATION TO REGISTER
THE SHARES THAT WOULD BE ISSUED UPON THE EXERCISE OF YOUR OPTION, AND IF IT
NEVER REGISTERS THE SHARES, YOU WILL NOT BE ABLE TO EXERCISE THE OPTION UNLESS
AN EXEMPTION FROM REGISTRATION IS AVAILABLE. AT THE PRESENT TIME, EXEMPTIONS
FROM REGISTRATION UNDER FEDERAL AND STATE SECURITIES LAWS ARE VERY LIMITED AND
MIGHT BE UNAVAILABLE TO YOU PRIOR TO THE EXPIRATION OF THE OPTION. CONSEQUENTLY,
YOU MIGHT HAVE NO OPPORTUNITY TO EXERCISE THE OPTION AND TO RECEIVE SHARES UPON
SUCH EXERCISE. IN ADDITION, YOU SHOULD CONSULT WITH YOUR TAX ADVISOR CONCERNING
THE RAMIFICATIONS TO YOU OF HOLDING OR EXERCISING YOUR OPTIONS OR HOLDING OR
SELLING THE SHARES UNDERLYING SUCH OPTIONS.

      You understand that, during any period in which the shares which may be
acquired pursuant to your option are subject to the provisions of Section 16 of
the Securities Exchange Act of 1934, as amended (and you yourself are also so
subject), in order for your transactions under the Plan to qualify for the
exemption from Section 16(b) provided by Rule 16b-3, a total of six months must
elapse between the grant of the option and the sale of shares underlying the
option.

                                      - 2 -


      Please execute the Acceptance and Acknowledgement set forth below on the
enclosed copy of this Agreement and return it to the undersigned.

                                                      Very truly yours,

                                                      claimsnet.com, inc.



                                                      By:______________________
                                                         Name:
                                                         Title:

                                      - 3 -


                         ACCEPTANCE AND ACKNOWLEDGEMENT

      I, a resident of the State of __________, accept the stock option
described above granted under the claimsnet.com, inc. 1997 Stock Option Plan,
and acknowledge receipt of a copy of this Agreement, including a copy of the
Plan. I have read and understand the Plan, including the provisions of Section 8
thereof.

Dated: _____________________

_______________________________________    ___________________________________
Taxpayer I.D. Number                              Signature


      By his or her signature below, the spouse of the Optionee, if such
Optionee is legally married as of the date of such Optionee's execution of this
Agreement, acknowledges that he or she has read this Agreement and the Plan and
is familiar with the terms and provisions thereof, and agrees to be bound by all
the terms and conditions of this Agreement and the Plan.

Dated: _____________________


                                                      _________________________
                                                      Spouse's Signature


                                                      _________________________
                                                      Printed Name


                                      - 4 -


                               NOTICE OF EXERCISE


      The undersigned, pursuant to a(n) [incentive] [nonqualified] Stock Option
Letter Agreement (the "Agreement") between the undersigned and claimsnet.com,
inc. (the "Company"), hereby irrevocably elects to exercise purchase rights
represented by the Agreement, and to purchase thereunder _______ shares (the
"Shares") of the Company's common stock, $.10 par value ("Common Stock"),
covered by the Agreement and herewith makes payment in full therefor.

      1. If the sale of the Shares and the resale thereof has not, prior to the
date hereof, been registered pursuant to a registration statement filed and
declared effective under the Securities Act of 1933, as amended (the "Act"), the
undersigned hereby agrees, represents, and warrants that:

            (a) the undersigned is acquiring the Shares for his or her own
account (and not for the account of others), for investment and not with a view
to the distribution or resale thereof;

            (b) By virtue of his or her position, the undersigned has access to
the same kind of information which would be available in a registration
statement filed under the Act;

            (c) the undersigned is a sophisticated investor;

            (d) the undersigned understands that he or she may not sell or
otherwise dispose of the Shares in the absence of either (i) a registration
statement filed under the Act or (ii) an exemption from the registration
provisions thereof; and

            (e) The certificates representing the Shares may contain a legend to
the effect of subsection (d) of this Section 1.

      2. If the sale of the Shares and the resale thereof has been registered
pursuant to a registration statement filed and declared effective under the Act,
the undersigned hereby represents

                                      - 1 -


and warrants that he or she has received the applicable prospectus and a copy of
the most recent annual report, as well as all other material sent to
stockholders generally.

      3. The undersigned acknowledges that the number of shares of Common Stock
subject to the Agreement is hereafter reduced by the number of shares of Common
Stock represented by the Shares.

                                    Very truly yours,



                                    ____________________________________
                                     (type name under signature line)


                                    Social Security No. ________________


                                    Address: ___________________________

                                    ____________________________________






                                      - 2 -