<SEC-DOCUMENT>0001085146-20-002104-index.html : 20200811
<SEC-HEADER>0001085146-20-002104.hdr.sgml : 20200811
<ACCEPTANCE-DATETIME>20200811104651
ACCESSION NUMBER:		0001085146-20-002104
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200811
DATE AS OF CHANGE:		20200811

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.
		CENTRAL INDEX KEY:			0001232860
		IRS NUMBER:				000000000

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-84460
		FILM NUMBER:		201091467

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		800-441-7762

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNI INTERMEDIATE DURATION FUND INC
		DATE OF NAME CHANGE:	20061026

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MUNI INTERMEDIATE DURATION FUND INC
		DATE OF NAME CHANGE:	20030514

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MACKAY SHIELDS LLC
		CENTRAL INDEX KEY:			0000061227
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				134080466
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		1345 AVENUE OF THE AMERICAS
		STREET 2:		42ND  FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10105
		BUSINESS PHONE:		212-230-3811

	MAIL ADDRESS:	
		STREET 1:		1345 AVENUE OF THE AMERICAS
		STREET 2:		42ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10105

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS FINANCIAL CORP
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>mui_73120.htm
<DESCRIPTION>MACKAY SHIELDS LLC
<TEXT>
Document 1 - file: mui_73120.htm

</DOCUMENT>
</SEC-DOCUMENT>