<SEC-DOCUMENT>0001104659-23-124994-index.html : 20231211
<SEC-HEADER>0001104659-23-124994.hdr.sgml : 20231211
<ACCEPTANCE-DATETIME>20231211160951
ACCESSION NUMBER:		0001104659-23-124994
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		15
CONFORMED PERIOD OF REPORT:	20230930
FILED AS OF DATE:		20231211
DATE AS OF CHANGE:		20231211
EFFECTIVENESS DATE:		20231211

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			abrdn Healthcare Investors
		CENTRAL INDEX KEY:			0000805267
		IRS NUMBER:				046564285
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		N-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04889
		FILM NUMBER:		231478222

	BUSINESS ADDRESS:	
		STREET 1:		1900 MARKET STREET
		STREET 2:		SUITE 200
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
		BUSINESS PHONE:		6177728515

	MAIL ADDRESS:	
		STREET 1:		1900 MARKET STREET
		STREET 2:		SUITE 200
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TEKLA HEALTHCARE INVESTORS
		DATE OF NAME CHANGE:	20141015

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	H&Q HEALTHCARE INVESTORS
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<TYPE>N-CSR
<SEQUENCE>1
<FILENAME>tm2325130d1_ncsr.htm
<DESCRIPTION>N-CSR
<TEXT>
Document 1 - file: tm2325130d1_ncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>tm2325130d1_ex99-cert.htm
<DESCRIPTION>EXHIBIT 99.CERT
<TEXT>
Document 2 - file: tm2325130d1_ex99-cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.SECTION 19(A)
<SEQUENCE>3
<FILENAME>tm2325130d1_ex99-sec19xa.htm
<DESCRIPTION>EXHIBIT 99.SECTION 19(A)
<TEXT>
Document 3 - file: tm2325130d1_ex99-sec19xa.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.IND PUB ACCT
<SEQUENCE>4
<FILENAME>tm2325130d1_ex99-indpubacct.htm
<DESCRIPTION>EXHIBIT 99.IND PUB ACCT
<TEXT>
Document 4 - file: tm2325130d1_ex99-indpubacct.htm

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<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>5
<FILENAME>tm2325130d1_ex99-906cert.htm
<DESCRIPTION>EXHIBIT 99.906CERT
<TEXT>
Document 5 - file: tm2325130d1_ex99-906cert.htm

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<SEQUENCE>6
<FILENAME>tm2325130d1hqhar25130d2i001.jpg
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<TEXT>
Document 6 - file: tm2325130d1hqhar25130d2i001.jpg

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Document 7 - file: tm2325130d1hqhar25130d2i002.jpg

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Document 8 - file: tm2325130d1hqhar25130d2i003.jpg

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Document 9 - file: tm2325130d1hqhar25130d2i004.jpg

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Document 10 - file: tm2325130d1hqhar25130d2i005.jpg

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Document 11 - file: tm2325130d1hqhar25130d2i006.jpg

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<SEQUENCE>12
<FILENAME>tm2325130d1hqhar25130d2i007.jpg
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<TEXT>
Document 12 - file: tm2325130d1hqhar25130d2i007.jpg

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<FILENAME>tm2325130d1hqhar25130d2i008.jpg
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Document 13 - file: tm2325130d1hqhar25130d2i008.jpg

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<TEXT>
Document 14 - file: tm2325130d1hqhar25130d2i009.jpg

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<FILENAME>tm2325130d1hqhar25130d2i010.jpg
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<TEXT>
Document 15 - file: tm2325130d1hqhar25130d2i010.jpg

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