<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2004-02-10</periodOfReport>

    <dateOfOriginalSubmission>2004-02-20</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001094561</issuerCik>
        <issuerName>QUOVADX INC</issuerName>
        <issuerTradingSymbol>QVDX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001280173</rptOwnerCik>
            <rptOwnerName>RANGELL MARK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>QUOVADX INC</rptOwnerStreet1>
            <rptOwnerStreet2>6400 S FIDDLER'S GREEN CR SUITE 1000</rptOwnerStreet2>
            <rptOwnerCity>ENGLEWOOD</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>SVP of Marketing and Corporate</officerTitle>
            <otherText>Services</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.25</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2009-03-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>60300</value>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.7</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2009-09-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>66800</value>
                    <footnoteId id="F4"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.938</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <value>2010-09-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>30000</value>
                    <footnoteId id="F6"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.53</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-11-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20000</value>
                    <footnoteId id="F8"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.61</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F11"/>
            </exerciseDate>
            <expirationDate>
                <value>2012-12-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>30000</value>
                    <footnoteId id="F10"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Held by the reporting person and his spouse as tenant-in-common.</footnote>
        <footnote id="F2">Grant to reporting person of an option to buy 60,300 shares of Quovadx common stock under the Company's Amended and Restated 1997 Stock Plan.</footnote>
        <footnote id="F3">The shares underlying the option, listed in column 3 of Table II, have vested in full as follows: 25% of the shares subject to the option vested on March 16, 2000 and 1/48th of the shares subject to the option vested each month thereafter.  Only 4,409 shares underlying the vested option remain exercisable.</footnote>
        <footnote id="F4">Grant to reporting person of an option to buy 66,800 shares of Quovadx common stock under the Company's Amended and Restated 1997 Stock Plan.</footnote>
        <footnote id="F5">The shares underlying the option, listed in column 3 of Table II, have vested in full as follows: 25% of the shares subject to the option vested on September 7, 2000 and 1/48th of the shares subject to the option vested each month thereafter.</footnote>
        <footnote id="F6">Grant to reporting person of an option to buy 30,000 shares of Quovadx common stock under the Company's Amended and Restated 1997 Stock Plan.</footnote>
        <footnote id="F7">The vesting terms of the shares underlying the option, listed in column 3 of Table II, are as follows: 25% of the shares subject to the option vested on September 21, 2001 and 1/48th of the shares subject to the option vested or shall vest each month thereafter, provided that the reporting person continues to be an employee of the Company on such dates.</footnote>
        <footnote id="F8">Grant to reporting person of an option to buy 20,000 shares of Quovadx common stock under the Company's Amended and Restated 1997 Stock Plan.</footnote>
        <footnote id="F9">The vesting terms of the shares underlying the option, listed in column 3 of Table II, are as follows: 25% of the shares subject to the option vested on November 15, 2002 and 1/48th of the shares subject to the option vested or shall vest each month thereafter, provided that the reporting person continues to be an employee of the Company on such dates.</footnote>
        <footnote id="F10">Grant to reporting person of an option to buy 30,000 shares of Quovadx common stock under the Company's Amended and Restated 1997 Stock Plan.</footnote>
        <footnote id="F11">The vesting terms of the shares underlying the option, listed in column 3 of Table II, are as follows: 25% of the shares subject to the option vested on December 20, 2003 and 1/48th of the shares subject to the option shall vest each month thereafter, provided that the reporting person continues to be an employee of the Company on such dates.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Linda K. Wackwitz as Attorney-in-Fact for Mark Rangell</signatureName>
        <signatureDate>2004-02-20</signatureDate>
    </ownerSignature>
</ownershipDocument>

