<SEC-DOCUMENT>0001251638-16-000005.txt : 20160623
<SEC-HEADER>0001251638-16-000005.hdr.sgml : 20160623
<ACCEPTANCE-DATETIME>20160623155656
ACCESSION NUMBER:		0001251638-16-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160621
FILED AS OF DATE:		20160623
DATE AS OF CHANGE:		20160623

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:			TROTMAN STANLEY S JR
		CENTRAL INDEX KEY:			0001251638

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08789
		FILM NUMBER:		161728651
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-06-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001251638</rptOwnerCik>
            <rptOwnerName>TROTMAN STANLEY S JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></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>2016-06-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>500</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>327111</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.25</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2016-06-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2017-06-20</value>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2023-06-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This represents an award of restricted stock units.  Each unit will entitle the reporting person to one share of the issuer's common stock upon vesting.  The units will vest in full upon the earlier of (I) the reporting person's completion of one year of service measured from June 21, 2016, or (II) such individual's continuation in Board service through the day immediately preceding the 2017 Annual Shareholders Meeting (the &quot;Vesting Date&quot;).</footnote>
        <footnote id="F2">Includes 500 shares subject to the reported restricted stock unit award which will vest in full on the Vesting Date.</footnote>
        <footnote id="F3">The reported stock option will vest in full upon the earlier of (I) the reporting person's completion of one year of service measured from June 21, 2016, or (II) such individual's continuation in Board service through the day immediately preceding the 2017 Annual Shareholders Meeting (the &quot;Vesting Date&quot;).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Chloe Tagawa on behalf of Stanley S. Trotman, Jr.</signatureName>
        <signatureDate>2016-06-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
