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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 dMYXLGFjD5yqC2VtDOy5Yw==

<SEC-DOCUMENT>0001267795-06-000001.txt : 20060921
<SEC-HEADER>0001267795-06-000001.hdr.sgml : 20060921
<ACCEPTANCE-DATETIME>20060921173730
ACCESSION NUMBER:		0001267795-06-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060920
FILED AS OF DATE:		20060921
DATE AS OF CHANGE:		20060921

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QUALITY SYSTEMS INC
		CENTRAL INDEX KEY:			0000708818
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				952888568
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		18191 VON KARMAN AVENUE
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92612
		BUSINESS PHONE:		7147317171

	MAIL ADDRESS:	
		STREET 1:		18191 VON KARMAN AVENUE
		STREET 2:		SUITE 450
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92612

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HUSSEIN AHMED D
		CENTRAL INDEX KEY:			0001267795

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12537
		FILM NUMBER:		061102858

	MAIL ADDRESS:	
		STREET 1:		18191 VON KERMAN AVE STE 405
		CITY:			IRVING
		STATE:			CA
		ZIP:			92612
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-09-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000708818</issuerCik>
        <issuerName>QUALITY SYSTEMS INC</issuerName>
        <issuerTradingSymbol>QSII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001267795</rptOwnerCik>
            <rptOwnerName>HUSSEIN AHMED D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>18191 VON KARMAN AVE STE 405</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>IRVINE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92612</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>39.81</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-09-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-09-20</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-09-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Original grant of 5,000 options dated September 20, 2006 vest in four equal annual installments beginning September 20, 2007.  The options fully vest at the end of the director's term of service if he is not re-elected to the Board, except for voluntary prior withdrawal or prior removal for cause.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Ahmed Hussein</signatureName>
        <signatureDate>2006-09-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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