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

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-03-29</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001828182</issuerCik>
        <issuerName>Signify Health, Inc.</issuerName>
        <issuerTradingSymbol>SGFY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001842579</rptOwnerCik>
            <rptOwnerName>Peterson Kyle B.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SIGNIFY HEALTH, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4055 VALLEY VIEW LN, SUITE 700</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75244</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-03-29</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>14672</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On March 29, 2023, pursuant to that certain Agreement and Plan of Merger, dated September 2, 2022, between the Issuer, CVS Pharmacy, Inc. (&quot;Parent&quot;) and Noah Merger Sub, Inc. (the &quot;Merger Agreement&quot;), each restricted stock unit with respect to shares of the Issuer's Class A Common Stock (each, an &quot;Issuer RSU&quot;), that was (i) outstanding immediately prior to the effective time of the merger (the &quot;Effective Time&quot;) to the extent vested and unsettled and (ii) any Issuer RSU that was outstanding immediately prior to the Effective Time and was held by any person who is a non-employee director, consultant or independent contractor engaged by the Issuer (each, a &quot;Cash-Out RSU&quot;), was cancelled and converted into the right to receive an amount in cash equal to (1) to $30.50 (the &quot;Per Share Consideration&quot;) multiplied by (2) the number of shares of the Issuer's Class A Common Stock subject to such Cash-Out RSU.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Adam McAnaney, as attorney-in-fact for Kyle B. Peterson</signatureName>
        <signatureDate>2023-03-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
