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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-02-17</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>0001110080</rptOwnerCik>
            <rptOwnerName>ESSEX WOODLANDS HEALTH VENTURES FUND IV L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10001 WOODLOCH FOREST DRIVE, SUITE 175</rptOwnerStreet1>
            <rptOwnerStreet2></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>0001120812</rptOwnerCik>
            <rptOwnerName>ESSEX WOODLANDS HEALTH VENTURES FUND V LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10001 WOODLOCH FOREST DRIVE, SUITE 175</rptOwnerStreet1>
            <rptOwnerStreet2></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>2006-02-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </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>2006-02-17</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>171147</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Fund</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 7, 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 may entitle 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.  The reported number of shares represents an increase in the minimum number of shares issuable to Essex Woodlands Health Ventures Fund V, L.P. upon termination of the escrow arrangement, assuming that the warrant is exercised as to the number of shares for which the warrant is currently exercisable.  To the extent that 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 derivative security.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Mark Pacala</signatureName>
        <signatureDate>2006-02-22</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: Essex Woodlands Health Ventures IV, L.L.C., its General Partner, by Mark Pacala, Manager</signatureName>
        <signatureDate>2006-02-22</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: Essex Woodlands Health Ventures V, L.L.C., its General Partner, by Mark Pacala, Manager</signatureName>
        <signatureDate>2006-02-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
