EXHIBIT 10.4



FIRST AMENDMENT TO

THE EMPLOYMENT AGREEMENT



This First Amendment to the Employment Agreement effective as
of May 6, 2003 (this Amendment) is entered into by and between AdvancePCS f/k/a/ Advance Paradigm, Inc. (the Company) and David D. Halbert (the Employee).



WHEREAS, the Company and Employee (collectively, the Parties)
entered into that certain Employment Agreement (including any Exhibits thereto) effective as of July 11, 2000 (the Agreement); and



WHEREAS, the Parties now desire to amend the Agreement as further described below;



NOW THEREFORE, in consideration of the premises and other good and valuable consideration, the receipt and sufficiency is
hereby acknowledged, the Parties hereby agree to the following:



|1. | Capitalized terms used herein, unless otherwise defined herein, have the meaning ascribed to such terms in the Agreement and, except as expressly provided herein all provision of
the Agreement shall remain in full force and effect.
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|2. | Section 2 of the Agreement is hereby amended by replacing the first sentence thereof in its entirety with the following sentence: Employees employment shall be for the
Employment Period with the initial term commencing on the date of the closing of the purchase of PCS Health Systems, Inc. by the Company, and extending therefrom until October 2, 2004.
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|3. | Section 2 of the Agreement is hereby further amended by adding the following new sentence at the end of Section 2: Notwithstanding the foregoing, if a Change in Control (as
such term is defined in Section 9(a) of this Agreement) shall have occurred during the Employment Period, the Employment Period for purposes of this Agreement shall expire no earlier than the date which is one year following the date of the Change
in Control.
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|4. | Section 8 of the Agreement is hereby amended by replacing Section 8(a) in its entirety with the following:
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(a)(1) In the event that Employees employment is
terminated by the Company prior to a Change in Control while this Agreement is in effect without Good Cause (as that term is defined in Sections 8(c) hereof); or if the Employee leaves the Companys employ for Good Reason (as that term is
defined in Section 8(d) hereof) as a result of the occurrence of an event set forth in Section 8(d)(1) or 8(d)(2) hereof:



(i) The Company shall pay to Employee an aggregate amount of three times his combined then annual salary and target bonus, which payment shall be made
within 90 calendar days of the date of termination. The Company shall continue to keep in full force and effect all plans or policies of medical, accident and life insurance benefits with respect to Employee and his dependents with the same level of
coverage available to employees under the terms of those employee benefit plans for a period of 12 months, upon the same terms, costs and otherwise to the same extent as such plans are in effect for employees of the Company who were similarly
situated to Employee as of the Termination Date, provided such continuation is permitted by law and such insurance policies.



(ii) Shares or options previously awarded to Employee but not yet vested or exercisable shall become fully vested as of the Termination Date and all
vested stock options shall be exercisable for one year commencing on the Termination Date.



(iii) Following the Employment Period, and in addition to that which is provided in paragraph 8(a)(1)(i) above, the Employee shall be eligible for continuation of health and dental insurance coverage pursuant to the
Consolidated Omnibus Budget Reconciliation Act (COBRA) for the 18 months following the Termination Date.



(a)(2) In the event that Employees employment is terminated by the Company on or after a Change in Control (other than for CIC
Cause, as that term is defined in Section 8(c) hereof); or if the Employee leaves the Companys employ for Good Reason as a result of the occurrence of any of the events listed in Sections 8(d)(3) through 8(d)(7) hereof, the Employee shall be
entitled to the following payments and benefits (collectively, the Severance Payments):



(i) a lump-sum severance payment, in cash, equal to three times the sum of (A) the Employees Base Salary as in effect immediately prior to the Date
of Termination, or, if higher, in effect immediately prior to the first occurrence of an event or circumstance constituting Good Reason following a Change in Control, and (B) the Employees target annual bonus under any annual bonus or
incentive plan maintained by the Company in respect of the fiscal year in which occurs the Date of Termination or, if higher, the fiscal year in which occurs the first event or circumstance constituting Good Reason following a Change in Control;



(ii) those other obligations and benefits accrued or earned
and vested (if applicable) by the Employee as of the Date of Termination;



(iii) Notwithstanding any provision of any annual or long-term incentive plan to the contrary, the Company shall pay to the Employee a lump sum amount, in cash, equal to the sum of (A) any unpaid incentive



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compensation which has been allocated or awarded to the Employee for a completed fiscal year or other measuring period preceding the Date of Termination
under any such plan and which, as of the Date of Termination, is contingent only upon the continued employment of the Employee to a subsequent date, and (B) a pro rata portion to the Date of Termination of the aggregate value of all contingent
incentive compensation awards to the Employee for all then uncompleted periods under any such plan, calculated as to each such award by multiplying the award that the Employee would have earned on the last day of the performance award period,
assuming the achievement, at the target level, of the individual and corporate performance goals established with respect to such award, by the fraction obtained by dividing the number of full months and any fractional portion of a month during such
performance award period through the Date of Termination by the total number of months contained in such performance award period; provided, however, that the payments contemplated by this clause (B) shall be offset by any amounts paid to the
Employee, but only with respect to the same performance award period, under any annual or long-term incentive plan in which the Employee participates.



(iv) any stock options or shares granted to the Employee shall become fully vested and all vested stock options shall be exercisable for one year
commencing on the Termination Date; and



(v) For the
thirty-six (36) month period immediately following the Date of Termination (or such longer period as any plan, program, practice or policy may provide), the Company shall arrange to provide the Employee and the Employees dependents with the
benefits to which Employee and the Employees dependents would have been entitled under Section 6(h) immediately prior to the Date of Termination or, if more favorable to the Employee, those provided to the Employee and the Employees
dependents immediately prior to the first occurrence of an event or circumstance constituting Good Reason following a Change in Control, at no greater after-tax cost to the Employee than the after-tax cost to the Employee immediately prior to such
date or occurrence; provided, however, that, unless the Employee consents to a different method (after taking into account the effect of such method on the calculation of parachute payments pursuant to Section 8(a)(2)(vi) hereof), such
benefits shall be provided through a third-party insurer. Benefits otherwise receivable by the Employee pursuant to this Section 8(a)(2)(v) shall be reduced to the extent benefits of the same type are received by or made available to the Employee
during the thirty-six (36) month period following the Employees termination of employment (and any such benefits received by or made available to the Employee shall be reported to the Company by the Employee); provided, however, that the
Company shall reimburse the Employee for the excess, if any, of the after-tax cost of



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such benefits to the Employee over such after-tax cost immediately prior to the Date of Termination or, if more favorable to the Employee, the first
occurrence of an event or circumstance constituting Good Reason following a Change in Control.



| | (vi) | (A) Whether or not the Employee becomes entitled to the Severance Payments, if any of the payments or benefits received or to be received by the Employee in connection with a Change
in Control or the Employees termination of employment (whether pursuant to the terms of this Agreement or any other plan, arrangement or agreement with the Company, any Person whose actions result in a Change in Control or any Person
affiliated with the Company or such Person) (all such payments and benefits, excluding the Gross-Up Payment, being hereinafter referred to as the Total Payments) will be subject to the Excise Tax, the Company shall pay to the Employee an
additional amount (the Gross-Up Payment) such that the net amount retained by the Employee, after deduction of any Excise Tax on the Total Payments and any federal, state and local income and employment taxes and Excise Tax upon the
Gross-Up Payment, and after taking into account the phase out of itemized deductions and personal exemptions attributable to the Gross-Up Payment, shall be equal to the Total Payments.
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(B) For purposes of determining whether any of the Total Payments will be
subject to the Excise Tax and the amount of such Excise Tax, (1) all of the Total Payments shall be treated as parachute payments (within the meaning of section 280G(b)(2) of the Code) unless, in the opinion of tax counsel (Tax
Counsel) reasonably acceptable to the Employee and selected by the accounting firm which was, immediately prior to the Change in Control, the Companys independent auditor (the Auditor), such payments or benefits (in whole or
in part) do not constitute parachute payments, including by reason of section 280G(b)(4)(A) of the Code, (2) all excess parachute payments within the meaning of section 280G(b)(l) of the Code shall be treated as subject to the Excise Tax
unless, in the opinion of Tax Counsel, such excess parachute payments (in whole or in part) represent reasonable compensation for services actually rendered (within the meaning of section 280G(b)(4)(B) of the Code) in excess of the Base Amount
allocable to such reasonable compensation, or are otherwise not subject to the Excise Tax, and (3) the value of any noncash benefits or any deferred payment or benefit shall be determined by the Auditor in accordance with the principles of sections
280G(d)(3) and (4) of the Code. For purposes of determining the amount of the Gross-Up Payment, the Employee shall be deemed to pay federal income tax at the highest marginal



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rate of federal income taxation in the calendar year in which the Gross-Up Payment is to be made and state and local income taxes at the highest marginal
rate of taxation in the state and locality of the Employees residence on the Date of Termination (or if there is no Date of Termination, then the date on which the Gross-Up Payment is calculated for purposes of this Section 5), net of the
maximum reduction in federal income taxes which could be obtained from deduction of such state and local taxes.



(C) In the event that the Excise Tax is finally determined to be less than the amount taken into account hereunder in calculating the Gross-Up Payment,
the Employee shall repay to the Company, within five (5) business days following the time that the amount of such reduction in the Excise Tax is finally determined, the portion of the Gross-Up Payment attributable to such reduction (plus that
portion of the Gross-Up Payment attributable to the Excise Tax and federal, state and local income and employment taxes imposed on the Gross-Up Payment being repaid by the Employee), to the extent that such repayment results in a reduction in the
Excise Tax and a dollar-for-dollar reduction in the Employees taxable income and wages for purposes of federal, state and local income and employment taxes, plus interest on the amount of such repayment at 120% of the rate provided in section
1274(b)(2)(B) of the Code. In the event that the Excise Tax is determined to exceed the amount taken into account hereunder in calculating the Gross-Up Payment (including by reason of any payment the existence or amount of which cannot be determined
at the time of the Gross-Up Payment), the Company shall make an additional Gross-Up Payment in respect of such excess (plus any interest, penalties or additions payable by the Employee with respect to such excess) within five (5) business days
following the time that the amount of such excess is finally determined. The Employee and the Company shall each reasonably cooperate with the other in connection with any administrative or judicial proceedings concerning the existence or amount of
liability for Excise Tax with respect to the Total Payments.



(vii) The payments provided in subsections 8(a)(2)(i), 8(a)(2)(iii) and 8(a)(2)(vi) of this Agreement shall be made not later than the fifth day following the Date of Termination (or if there is no Date of Termination, then the date on
which the Gross-Up Payment is calculated for purposes of Section 8(a)(2) of this Agreement); provided, however, that if the amounts of such payments cannot be finally determined on or before such day, the Company shall pay to the Employee on such
day an estimate, as determined in good faith by the Employee or, in the case of payments under Section 8(a)(2)(vi) of this Agreement, in accordance with Section 8(a)(2)(vi) of this Agreement, of the minimum amount of such payments



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to which the Employee is clearly entitled and shall pay the remainder of such payments (together with interest on the unpaid remainder (or on all such
payments to the extent the Company fails to make such payments when due) at 120% of the rate provided in section 1274(b)(2)(B) of the Code) as soon as the amount thereof can be determined but in no event later than the thirtieth (30th) day after the
Date of Termination. In the event that the amount of the estimated payments exceeds the amount subsequently determined to have been due, such excess shall be repaid by the Employee to the Company on the fifth (5th) business day after demand by the
Company (together with interest at 120% of the rate provided in section 1274(b)(2)(B) of the Code). At the time that payments are made under this Agreement, the Company shall provide the Employee with a written statement setting forth the manner in
which such payments were calculated and the basis for such calculations including, without limitation, any opinions or other advice the Company has received from Tax Counsel, the Auditor or other advisors or consultants (and any such opinions or
advice which are in writing shall be attached to the statement).



|5. | Section 8 of the Agreement is hereby further amended by replacing Sections 8(b), 8(c) and 8(d) in their entirety with the following new Sections 8(b), 8(c) and 8(d):
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(b) In the event that Employees
employment is terminated by the Company (i) prior to a Change in Control for Good Cause or (ii) on or after a Change in Control for CIC Cause (as such terms are defined in Section 8(c) hereof):



(1) Any vested shares or stock options previously granted
but unexercised shall be exercisable within 90 days of the termination date. Any shares or stock options unvested at the Termination Date shall be forfeited.



(2) The Companys obligations to Employee shall terminate other than as set forth in Section 8(b)(1) above and other than the
obligation to pay to Employee the portion of Base Salary earned and the balance of the paid time off earned by Employee through the Date of Termination and those other obligations and benefits accrued or earned and vested (if applicable) by the
Employee as of the Date of Termination including the amount of any compensation previously deferred by Employee, if any, consistent with the terms of any applicable plan or program.



(c) For Purposes of this Agreement, Good Cause shall mean: (1) the commission of a proven act of fraud or
dishonesty in the course of employment; (2) the conviction of a crime constituting a felony or in respect of any act of fraud, dishonesty or moral turpitude; (3) the commission of an act which would make the Employee subject to being enjoined,
suspended, barred or otherwise disciplined for violation of federal or state securities laws, rules or regulations, including a statutory disqualification.



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For purposes of this Agreement, CIC Cause shall mean (1) any willful and material act or acts
of personal dishonesty taken by the Employee at the expense of the Company, or (2) any willful and material violation by the Employee of the Employees obligations under this Agreement, or (3) the conviction of the Employee of a felony, or (4)
failure to meet reasonable performance criteria for the Employees position as established by the Company, after Employee fails to cure such non-performance within a reasonable time after receiving notice of the same. For purposes of this
Section 8(c), (1) the term willful shall mean any act of the Employee done in bad faith or without reasonable belief that the Employees action was in the best interest of the Company and (2) with respect to any termination of
employment pursuant to clause (1), (2) or (4) of the definition of CIC Cause contained herein, notwithstanding anything herein to the contrary, a Notice of Termination for such CIC Cause shall include a copy of a resolution duly adopted by the
affirmative vote of not less than two-thirds (2/3) of the entire membership of the Board of Directors at a meeting of the Board of Directors which was called and held for the purpose of considering such termination (after reasonable notice to the
Employee and an opportunity for the Employee, together with the Employees counsel, to be heard before the Board of Directors) finding that, in the good faith opinion of the Board of Directors, the Employee was guilty of conduct set forth in
clause (1), (2) or (4), and specifying the particulars thereof in detail. In the event of a dispute concerning the application of this provision, no claim by the Company that CIC Cause exists shall be given effect unless the Company establishes to
the Board of Directors by clear and convincing evidence that CIC Cause exists.



(d) For purposes of this Agreement, Good Reason shall mean the occurrence of any of the following events (1) after good faith negotiations, the Companys refusal to renew this Agreement; (2) the
Employees duties and responsibilities are materially changed as a result of action by the Board; (3) the occurrence of a Change in Control; (4) the assignment to the Employee of any duties inconsistent in any material respect with the
Employees position authority, duties or responsibilities as contemplated by Sections 1 and 3 of this Agreement, or any other action by the Company which results in a significant diminution in such position, authority, duties or
responsibilities, excluding any isolated and inadvertent action not taken in bad faith and which is remedied by the Company within ten (10) days after receipt of a notice thereof given by the Employee; (5) any failure by the Company to comply with
any of the provisions of Section 6, Compensation of this Agreement other than an isolated and inadvertent failure not taken in bad faith and which is remedied by the Company within ten (10) days after receipt of notice thereof
given by the Employee; (6) the Employee being required to relocate to a principal place of employment more than twenty-five (25) miles from the Employees current principal place of employment; or (7) any purported termination by the Company of
the Employees employment otherwise than as expressly permitted by this Agreement.





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|6. | Section 9 of the Agreement is hereby amended by replacing such Section in its entirety by the following:
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| | 9. | Certain Definitions.
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(a) A Change in Control shall be deemed to have occurred if the event set forth in any one of the following paragraphs shall have occurred:



| | (1) | any Person is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing 50% or more of the combined voting power of the Companys then
outstanding securities (the Beneficial Ownership Event); provided, however, a Beneficial Ownership Event shall not constitute a Change in Control under this paragraph 1 if such Beneficial Ownership Event occurs in connection with the
consummation of a merger or consolidation of the Company or any direct or indirect subsidiary of the Company with any other corporation immediately following which the individuals who comprise the Board of Directors immediately prior thereto
constitute at least a majority of the board of directors of the Company, the entity surviving such merger or consolidation or any parent thereof; or
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| | (2) | the following individuals cease for any reason to constitute a majority of the number of directors then serving: individuals who, on the date hereof, constitute the Board of
Directors of the Company and any new director (other than a director whose initial assumption of office is in connection with an actual or threatened election contest, including but not limited to a consent solicitation, relating to the election of
directors of the Company) whose appointment or election by the Board of Directors or nomination for election by the Companys stockholders was approved or recommended by a vote of at least two-thirds (2/3) of the directors then still in office
who either were directors on the date hereof or whose appointment, election or nomination for election was previously so approved or recommended; or
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| | (3) | there is consummated a merger or consolidation of the Company or any direct or indirect subsidiary of the Company with any other corporation, other than a merger or consolidation
immediately following which the individuals who comprise the Board of Directors immediately prior thereto constitute at least a majority of the board of directors of the Company, the entity surviving such merger or consolidation or any parent
thereof; or
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| | (4) | the stockholders of the Company approve a plan of complete liquidation or dissolution of the Company or there is consummated an agreement for the sale or disposition by the Company
of all or substantially all of the Companys assets, other than a sale or disposition by the Company of all or substantially all of the Companys assets immediately following which the individuals who comprise the Board of Directors
immediately prior thereto constitute at least a majority of the board of directors of the entity to which such assets are sold or disposed or any parent thereof.
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Notwithstanding the foregoing, a Change in Control shall not be deemed to have occurred by virtue of the
consummation of any transaction or series of integrated transactions immediately following which the record holders of the common stock of the Company immediately prior to such transaction or series of transactions continue to have substantially the
same proportionate ownership in an entity which owns all or substantially all of the assets of the Company immediately following such transaction or series of transactions.



| | (b) | Affiliate shall have the meaning set forth in Rule 12b-2 promulgated under Section 12 of the Exchange Act.
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| | (c) | Base Amount shall have the meaning set forth in section 280G(b)(3) of the Code.
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| | (d) | Beneficial Owner shall have the meaning set forth in Rule 13d-3 under the Exchange Act.
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| | (e) | Code shall mean the Internal Revenue Code of 1986, as amended from time to time.
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| | (f) | Exchange Act shall mean the Securities Exchange Act of 1934, as amended from time to time.
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| | (g) | Excise Tax shall mean any excise tax imposed under section 4999 of the Code.
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| | (h) | Person shall have the meaning given in Section 3(a)(9) of the Exchange Act, as modified and used in Sections 13(d) and 14(d) thereof, except that such term shall not
include (i) the Company or any of its subsidiaries, (ii) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or any of its Affiliates, (iii) an underwriter temporarily holding securities pursuant to an
offering of such securities, or (iv) a corporation owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company.
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|7. | For purposes of this Amendment, each reference to the term Date of Termination contained herein shall be deemed to be a reference to the term Termination
Date (as defined in Section 2 of the Agreement).
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IN WITNESS WHEREOF, the parties have executed this Amendment as of the date and year first above written.



ADVANCEPCSBy:David D. Halbert






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