    <SEC-DOCUMENT>0000950170-23-015287-index.html : 20230427
    <SEC-HEADER>0000950170-23-015287.hdr.sgml : 20230427
    <ACCEPTANCE-DATETIME>20230427161717
    ACCESSION NUMBER:		0000950170-23-015287
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20221231
    FILED AS OF DATE:		20230427
    DATE AS OF CHANGE:		20230427
    EFFECTIVENESS DATE:		20230427

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FIBROGEN INC
    		CENTRAL INDEX KEY:			0000921299
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36740
    		FILM NUMBER:		23857199

    	BUSINESS ADDRESS:
    		STREET 1:		409 ILLINOIS STREET
    		CITY:			SAN FRANCISCO
    		STATE:			CA
    		ZIP:			94158
    		BUSINESS PHONE:		415-978-1200

    	MAIL ADDRESS:
    		STREET 1:		409 ILLINOIS STREET
    		CITY:			SAN FRANCISCO
    		STATE:			CA
    		ZIP:			94158
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>fgen-ars-10k-20221231.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: fgen-ars-10k-20221231.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>