<SEC-DOCUMENT>0000744825-12-000008.txt : 20120618
<SEC-HEADER>0000744825-12-000008.hdr.sgml : 20120618
<ACCEPTANCE-DATETIME>20120618184837
ACCESSION NUMBER:		0000744825-12-000008
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20120404
FILED AS OF DATE:		20120618
DATE AS OF CHANGE:		20120618

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN SHARED HOSPITAL SERVICES
		CENTRAL INDEX KEY:			0000744825
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				942918118
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		FOUR EMBARCADERO CENTER
		STREET 2:		SUITE 3700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111-4107
		BUSINESS PHONE:		415-788-5300

	MAIL ADDRESS:	
		STREET 1:		FOUR EMBARCADERO CENTER
		STREET 2:		SUITE 3700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111-4107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			AMERICAN SHARED HOSPITAL SERVICES
		CENTRAL INDEX KEY:			0000744825
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08789
		FILM NUMBER:		12913473

	BUSINESS ADDRESS:	
		STREET 1:		FOUR EMBARCADERO CENTER
		STREET 2:		SUITE 3700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111-4107
		BUSINESS PHONE:		415-788-5300

	MAIL ADDRESS:	
		STREET 1:		FOUR EMBARCADERO CENTER
		STREET 2:		SUITE 3700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111-4107
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0305</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2012-04-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000744825</issuerCik>
        <issuerName>AMERICAN SHARED HOSPITAL SERVICES</issuerName>
        <issuerTradingSymbol>AMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000744825</rptOwnerCik>
            <rptOwnerName>AMERICAN SHARED HOSPITAL SERVICES</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>FOUR EMBARCADERO CENTER</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 3700</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111-4107</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2012-04-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.2657</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3500</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">THE COMMON STOCK BALANCE INCLUDES 500 RESTRICTED COMMON STOCK THAT WILL VEST IN FULL UPON THE EARLIER OF (I) THE REPORTING PERSON'S COMPLETION OF ONE YEAR OF SERVICE MEASURED FROM JUNE 9, 2011 OR (II) SUCH INDIVIDUAL'S CONTINUATION IN BOARD SERVICE THROUGH THE DAY IMMEDIATELY PRECEDING THE 2012 ANNUAL SHAREHOLDERS MEETING (THE &quot;VESTING DATE&quot;).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>ERIC OHWA ON BEHALF OF SAIM MERT OZYUREK</signatureName>
        <signatureDate>2012-06-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
