<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2008-02-13</periodOfReport>

    <dateOfOriginalSubmission>2008-02-26</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000798783</issuerCik>
        <issuerName>UNIVERSAL HEALTH REALTY INCOME TRUST</issuerName>
        <issuerTradingSymbol>UHT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001180998</rptOwnerCik>
            <rptOwnerName>FOWLER TIMOTHY J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>UHS OF DELAWARE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3525 PIEDMONT ROAD, N.E.</rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30305</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-02-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>83.232</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>34.27</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Shares Of Beneficial Interest</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>83.232</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares of phantom stock are based on interests held under the Universal Health Services, Inc. Amended and Restated Supplemental Deferred Compensation Plan (the &quot;Plan&quot;).</footnote>
        <footnote id="F2">1-for-1.</footnote>
        <footnote id="F3">On February 19, 2008, Mr. Fowler received a cash distribution in the amount of $2,924.45 in settlement of 83.232 shares of phantom stock credited to his sub-account under the Plan. The Form 4 previously filed to report this transaction included the incorrect date and amount of the distribution.</footnote>
        <footnote id="F4">Immediately.</footnote>
        <footnote id="F5">Shares of phantom stock are settled in cash following a fixed period or retirement from Universal Health Services, Inc. pursuant to the terms of the Plan.</footnote>
        <footnote id="F6">The Form 4 previously filed to report this transaction included the incorrect price of the derivative security.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Timothy J. Fowler</signatureName>
        <signatureDate>2008-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
