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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-05-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001017813</issuerCik>
        <issuerName>PATIENT INFOSYSTEMS INC</issuerName>
        <issuerTradingSymbol>PATY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001321250</rptOwnerCik>
            <rptOwnerName>Pacala Mark L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ESSEX WOODLANDS HEALTH VENTURES</rptOwnerStreet1>
            <rptOwnerStreet2>10001 WOODLOCK FOREST DRIVE, SUITE 175</rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001120812</rptOwnerCik>
            <rptOwnerName>ESSEX WOODLANDS HEALTH VENTURES FUND V LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ESSEX WOODLANDS HEALTH VENTURES</rptOwnerStreet1>
            <rptOwnerStreet2>10001 WOODLOCK FOREST DRIVE, SUITE 175</rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001110080</rptOwnerCik>
            <rptOwnerName>ESSEX WOODLANDS HEALTH VENTURES FUND IV L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ESSEX WOODLANDS HEALTH VENTURES</rptOwnerStreet1>
            <rptOwnerStreet2>10001 WOODLOCK FOREST DRIVE, SUITE 175</rptOwnerStreet2>
            <rptOwnerCity>THE WOODLANDS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77380</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Warrant to Purchase Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.0032</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-05-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>171147</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-05-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-11-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>171147</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>342294</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By fund through escrow</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares are beneficially owned by Essex Woodlands Health Ventures Fund V, L.P. Represents shares held in escrow for the benefit of former stockholders of CCS Consolidated, Inc. whose shares were converted into shares of the Issuer as a result of a merger between CCS Consolidated, Inc. and the Issuer. The Reporting Persons previously reported the ownership of 746,485 shares of the Issuer's common stock on a Form 3 filed on February 6, 2006, which represented the minimum number of shares issuable to Essex Woodlands Health Ventures Fund V, L.P. upon termination of the escrow arrangement and liquidation of the escrow account as of such date.  Essex Woodlands Health Ventures Fund V, L.P. holds a warrant which entitles it to purchase additional shares currently held in the escrow account, subject to the terms thereof.</footnote>
        <footnote id="F2">On February 17, 2006, the warrant became partially exercisable, and on February 22, 2006, the Reporting Persons filed a Form 4 reporting the acquisition of 171,147 shares of the Issuer's common stock underlying such warrant.  On May 17, 2006, the warrant became exercisable for an additional number of shares.  The shares reported herein represent an increase in the minimum number of shares issuable to Essex Woodlands Health Ventures Fund V, L.P. upon termination of the escrow agreement, assuming that the warrant is exercised as to the number of shares for which the warrant is currently exercisable.  To the extent the warrant becomes exercisable for additional shares after the date of this Form 4, the Reporting Persons will file an additional Form 4 reflecting the acquisition of a deriviate security.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Mark L. Pacala</signatureName>
        <signatureDate>2006-05-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: Essex Woodlands Health Ventures V, L.L.C., its General Partner, by /s/ Mark Pacala, Manager</signatureName>
        <signatureDate>2006-05-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: Essex Woodlands Health Ventures IV, L.L.C., its General Partner, by /s/ Mark Pacala, Manager</signatureName>
        <signatureDate>2006-05-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
