    <SEC-DOCUMENT>0001193125-19-236247-index.html : 20190903
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    <ACCEPTANCE-DATETIME>20190903125917
    ACCESSION NUMBER:		0001193125-19-236247
    CONFORMED SUBMISSION TYPE:	N-CSRS
    PUBLIC DOCUMENT COUNT:		18
    CONFORMED PERIOD OF REPORT:	20190630
    FILED AS OF DATE:		20190903
    DATE AS OF CHANGE:		20190903
    EFFECTIVENESS DATE:		20190903

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BlackRock Health Sciences Trust
    		CENTRAL INDEX KEY:			0001314966
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE

    	FILING VALUES:
    		FORM TYPE:		N-CSRS
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-21702
    		FILM NUMBER:		191071557

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		(888) 825-2257

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
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    <TYPE>N-CSRS
    <SEQUENCE>1
    <FILENAME>d744292dncsrs.htm
    <DESCRIPTION>BLACKROCK HEALTH SCIENCES TRUST
    <TEXT>
    Document 1 - file: d744292dncsrs.htm

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    <TYPE>EX-99.CERT
    <SEQUENCE>2
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    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
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    Document 2 - file: d744292dex99cert.htm

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    <TYPE>EX-99.906 CERT
    <SEQUENCE>3
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    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
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    Document 3 - file: d744292dex99906cert.htm

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    <TYPE>EX-99.NOTICE
    <SEQUENCE>4
    <FILENAME>d744292dex99notice.htm
    <DESCRIPTION>SECTION 19 NOTICE
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    Document 4 - file: d744292dex99notice.htm

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    <DESCRIPTION>GRAPHIC
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    <DESCRIPTION>GRAPHIC
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