<ACCESSION-NUMBER>0001564590-18-009839 <TYPE>10-Q <PUBLIC-DOCUMENT-COUNT>75 <PERIOD>20180331 <FILING-DATE>20180430 <DATE-OF-FILING-DATE-CHANGE>20180430 <FILER> <COMPANY-DATA> <CONFORMED-NAME>Inogen Inc <CIK>0001294133 <ASSIGNED-SIC>3842 <IRS-NUMBER>000000000 <STATE-OF-INCORPORATION>DE </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>10-Q <ACT>34 <FILE-NUMBER>001-36309 <FILM-NUMBER>18789967 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>326 BOLLAY DRIVE <CITY>GOLETA <STATE>CA <ZIP>93117 <PHONE>805-562-0500 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>326 BOLLAY DRIVE <CITY>GOLETA <STATE>CA <ZIP>93117 </MAIL-ADDRESS> </FILER>