<SEC-DOCUMENT>0001179929-18-000138.txt : 20180703
<SEC-HEADER>0001179929-18-000138.hdr.sgml : 20180703
<ACCEPTANCE-DATETIME>20180703190443
ACCESSION NUMBER:		0001179929-18-000138
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180630
FILED AS OF DATE:		20180703
DATE AS OF CHANGE:		20180703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Barlow Jeff D.
		CENTRAL INDEX KEY:			0001555603

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31719
		FILM NUMBER:		18939054

	MAIL ADDRESS:	
		STREET 1:		300 UNIVERSITY AVENUE, SUITE 100
		CITY:			SACRAMENTO
		STATE:			CA
		ZIP:			95825

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MOLINA HEALTHCARE INC
		CENTRAL INDEX KEY:			0001179929
		STANDARD INDUSTRIAL CLASSIFICATION:	HOSPITAL & MEDICAL SERVICE PLANS [6324]
		IRS NUMBER:				134204626
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		200 OCEANGATE, SUITE 100
		CITY:			LONG BEACH
		STATE:			CA
		ZIP:			90802
		BUSINESS PHONE:		5624353666

	MAIL ADDRESS:	
		STREET 1:		200 OCEANGATE, SUITE 100
		CITY:			LONG BEACH
		STATE:			CA
		ZIP:			90802
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_153065906821891.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-06-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001179929</issuerCik>
        <issuerName>MOLINA HEALTHCARE INC</issuerName>
        <issuerTradingSymbol>MOH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001555603</rptOwnerCik>
            <rptOwnerName>Barlow Jeff D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>300 UNIVERSITY AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>SACRAMENTO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95825</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Legal Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-06-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>296</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>76.68</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>56218</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The shares were acquired under the Molina Healthcare, Inc. 2011 Employee Stock Purchase Plan (the &quot;ESPP&quot;).</footnote>
        <footnote id="F2">Represents the opening price of Issuer's common stock on January 2, 2018, the first trading day of the ESPP offering period. The purchase price is based on the stock's lower market price as of the two following dates: (1) January 1, 2018, the first day of the ESPP offering period, and (2) June 30, 2018, the last day of the ESPP offering period.</footnote>
        <footnote id="F3">The shares vest as follows: (i) 22,259 shares are subject to vesting in one-third increments on each of March 1, 2019, March 1, 2020, and March 1, 2021; (ii) an additional 3,158 shares are subject to vesting on each of March 1, 2019 and March 1, 2020; (iii) 3,132 shares are subject to vesting based on the Company's 2018 after tax profit margin; (iv) 3,132 shares are subject to vesting on March 7, 2019; the remainder of the shares are vested.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Jeff D. Barlow</signatureName>
        <signatureDate>2018-07-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
