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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000893160-05-000007.txt : 20050310
<SEC-HEADER>0000893160-05-000007.hdr.sgml : 20050310
<ACCEPTANCE-DATETIME>20050310122922
ACCESSION NUMBER:		0000893160-05-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050308
FILED AS OF DATE:		20050310
DATE AS OF CHANGE:		20050310

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GROGAN THOMAS
		CENTRAL INDEX KEY:			0001134547

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20931
		FILM NUMBER:		05671455

	MAIL ADDRESS:	
		STREET 1:		1910 INNOVATION PARK DR
		CITY:			TUCSON
		STATE:			AZ
		ZIP:			85737

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VENTANA MEDICAL SYSTEMS INC
		CENTRAL INDEX KEY:			0000893160
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				942976937
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1910 INNOVATION PARK DRIVE
		CITY:			TUCSON
		STATE:			AZ
		ZIP:			85737
		BUSINESS PHONE:		800-227-2155

	MAIL ADDRESS:	
		STREET 1:		1910 INNOVATION PARK DRIVE
		CITY:			TUCSON
		STATE:			AZ
		ZIP:			85737
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
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    <footnotes>
        <footnote id="F1">Stock options vest monthly over a five year period with full vesting on May 6,2004.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Nicholas Malden as attorney in fact for Thomas Grogan</signatureName>
        <signatureDate>2005-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----