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<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20031201
<FILING-DATE>20031205
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>BARCLAY BRUCE
<CIK>0001266817
</OWNER-DATA>
<FILING-VALUES>
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<ACT>34
<FILE-NUMBER>000-23837
<FILM-NUMBER>031039235
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>CARDIAC SCHIENCE INC
<STREET2>1900 MAIN ST
<CITY>IRVINE
<STATE>CA
<ZIP>92614
<PHONE>9497973844
</BUSINESS-ADDRESS>
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<COMPANY-DATA>
<CONFORMED-NAME>SURMODICS INC
<CIK>0000924717
<ASSIGNED-SIC>2891
<IRS-NUMBER>411356149
<STATE-OF-INCORPORATION>MN
<FISCAL-YEAR-END>0930
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>9924 W 74TH ST
<CITY>EDEN PRAIRIE
<STATE>MN
<ZIP>55344
<PHONE>6128292700
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>9924 WEST 74TH ST
<CITY>EDEN PRAIRIE
<STATE>MN
<ZIP>55344
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>BSI CORP
<DATE-CHANGED>19970506
</FORMER-COMPANY>
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<DESCRIPTION>PRIMARY DOCUMENT
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<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType><periodOfReport>2003-12-01</periodOfReport>
    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000924717</issuerCik>
        <issuerName>SURMODICS INC</issuerName>
        <issuerTradingSymbol>SRDX</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001266817</rptOwnerCik>
            <rptOwnerName>BARCLAY BRUCE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9924 WEST 74TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>EDEN PRAIRIE</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55344</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther><officerTitle>President &amp; COO</officerTitle></reportingOwnerRelationship></reportingOwner><footnotes/><remarks/><ownerSignature><signatureName>Bruce J Barclay</signatureName><signatureDate>2003-12-04</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
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