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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 MdfWiC8MQ/yyRLsHcMTh5zRi4Jlxlae+xhu1eg32DSHZBM1cYD1639TacqyMc48L
 rgMbBkbOXetxZeRHl3PB4w==

<SEC-DOCUMENT>0001005757-03-000021.txt : 20030514
<SEC-HEADER>0001005757-03-000021.hdr.sgml : 20030514
<ACCEPTANCE-DATETIME>20030514161155
ACCESSION NUMBER:		0001005757-03-000021
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030512
FILED AS OF DATE:		20030514

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SICA FRANK V
		CENTRAL INDEX KEY:			0001186223

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		03699276

	MAIL ADDRESS:	
		STREET 1:		CSG SYSTEMS INTERNATIONAL INC
		STREET 2:		7887 E BELLEVIEW AVE STE 1000
		CITY:			ENGEWOOD
		STATE:			CO
		ZIP:			801111

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				470783182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7887 EAST BELLEVIEW AVE
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		7887 E. BELLVIEW AVE.
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001186223d20030514f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<ownershipDocument>    <schemaVersion>X0101</schemaVersion><documentType>4</documentType><periodOfReport>2003-05-12</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001005757</issuerCik>        <issuerName>CSG SYSTEMS INTERNATIONAL INC</issuerName><issuerTradingSymbol>CSGS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001186223</rptOwnerCik>            <rptOwnerName>SICA FRANK V</rptOwnerName>        </reportingOwnerId>        <reportingOwnerAddress>            <rptOwnerStreet1>  </rptOwnerStreet1>            <rptOwnerStreet2>  </rptOwnerStreet2>            <rptOwnerCity>  </rptOwnerCity>            <rptOwnerState>  </rptOwnerState>            <rptOwnerZipCode>  </rptOwnerZipCode>        </reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle></officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner
><derivativeSecurity><securityTitle><value>Stock Options (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>12.2</value></conversionOrExercisePrice><transactionDate><value>2003-05-12</value></transactionDate><deemedExecutionDate><value>2003-05-12</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>18700</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-05-12</value></exerciseDate><expirationDate><value>2013-05-12</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2700</value><footnoteId id="F1"/></underlyingSecurityShares></underlyingSecurity><post
TransactionAmounts><sharesOwnedFollowingTransaction><value>18700</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">The stock option reported in Table II is exercisable in three installments of 2,700; 8,000 and 8,000 shares each, beginning May 12, 2004.</footnote></footnotes><ownerSignature><signatureName>FRANK V SICA</signatureName><signatureDate>2003-05-14</signatureDate></ownerSignature></ownershipDocument>

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