-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001294133-10-000005.txt : 20100713
<SEC-HEADER>0001294133-10-000005.hdr.sgml : 20100713
<ACCEPTANCE-DATETIME>20100713134730
ACCESSION NUMBER:		0001294133-10-000005
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20100713
DATE AS OF CHANGE:		20100713
EFFECTIVENESS DATE:		20100713

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Inogen Inc
		CENTRAL INDEX KEY:			0001294133
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-66427
		FILM NUMBER:		10949953

	BUSINESS ADDRESS:	
		STREET 1:		326 BOLLAY DRIVE
		CITY:			GOLETA
		STATE:			CA
		ZIP:			93117
		BUSINESS PHONE:		805-562-0500

	MAIL ADDRESS:	
		STREET 1:		326 BOLLAY DRIVE
		CITY:			GOLETA
		STATE:			CA
		ZIP:			93117
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001294133</cik>
        <entityName>Inogen Inc</entityName>
        <issuerAddress>
            <street1>326 BOLLAY DRIVE</street1>
            <city>GOLETA</city>
            <stateOrCountry>CA</stateOrCountry>
            <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
            <zipCode>93117</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>805-562-0500</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Raymond</firstName>
                <lastName>Huggenberger</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Inogen, Inc.</street1>
                <street2>326 Bollay Drive</street2>
                <city>Goleta</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>93117</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Heath</firstName>
                <lastName>Lukatch</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Novo A/S</street1>
                <street2>Krogshoejvej 41</street2>
                <city>Bagsvaerd</city>
                <stateOrCountry>G7</stateOrCountry>
                <stateOrCountryDescription>DENMARK</stateOrCountryDescription>
                <zipCode>DK-2880</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Shephen</firstName>
                <middleName>E.</middleName>
                <lastName>Cooper</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1311 Hampton Court</street1>
                <city>Discovery Bay</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94514</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>J.</middleName>
                <lastName>Link</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Versant Ventures</street1>
                <street2>450 Newport Center Dr., #380</street2>
                <city>Goleta</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>93117</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Chalres</firstName>
                <middleName>E.</middleName>
                <lastName>Larson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Accuitive Medical Ventures</street1>
                <street2>795 Promontory Dr. West</street2>
                <city>Newport Beach</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>92660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Alison</firstName>
                <lastName>Perry</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Inogen, Inc.</street1>
                <street2>326 Bollay Drive</street2>
                <city>Goleta</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>93117</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Health Care</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001294133-10-000004</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-02-16</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>10000000</totalOfferingAmount>
            <totalAmountSold>9645996</totalAmountSold>
            <totalRemaining>354004</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>8</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Inogen Inc</issuerName>
                <signatureName>/s/ Alison Perry</signatureName>
                <nameOfSigner>Alison Perry</nameOfSigner>
                <signatureTitle>CFO, VP of Finance</signatureTitle>
                <signatureDate>2010-07-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
