<SEC-DOCUMENT>0000950123-01-503642-index.html : 20010621

<SEC-HEADER>0000950123-01-503642.hdr.sgml : 20010621

ACCESSION NUMBER:		0000950123-01-503642

CONFORMED SUBMISSION TYPE:	10-K/A

PUBLIC DOCUMENT COUNT:		4

CONFORMED PERIOD OF REPORT:	20001231

FILED AS OF DATE:		20010620


FILER:


	COMPANY DATA:	

		COMPANY CONFORMED NAME:			MERCK & CO INC

		CENTRAL INDEX KEY:			0000064978

		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]

		IRS NUMBER:				221109110

		STATE OF INCORPORATION:			NJ

		FISCAL YEAR END:			1231


	FILING VALUES:

		FORM TYPE:		10-K/A

		SEC ACT:		

		SEC FILE NUMBER:	001-03305

		FILM NUMBER:		1663985


	BUSINESS ADDRESS:	

		STREET 1:		ONE MERCK DR

		STREET 2:		P O BOX 100

		CITY:			WHITEHOUSE STATION

		STATE:			NJ

		ZIP:			08889-0100

		BUSINESS PHONE:		9084234044


	MAIL ADDRESS:	

		STREET 1:		ONE MERCK DR

		STREET 2:		PO BOX 100 WS3AB-05

		CITY:			WHITEHOUSE STATION

		STATE:			NJ

		ZIP:			08889-0100

</SEC-HEADER>

<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>y48789a1e10-ka.txt
<DESCRIPTION>AMENDMENT # 1 TO FORM 10-K
<TEXT>
Document 1 - file: y48789a1e10-ka.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A
<SEQUENCE>2
<FILENAME>y48789a1ex99-a.txt
<DESCRIPTION>FINANCIAL STATEMENTS
<TEXT>
Document 2 - file: y48789a1ex99-a.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.B
<SEQUENCE>3
<FILENAME>y48789a1ex99-b.txt
<DESCRIPTION>FINANCIAL STATEMENTS
<TEXT>
Document 3 - file: y48789a1ex99-b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.C
<SEQUENCE>4
<FILENAME>y48789a1ex99-c.txt
<DESCRIPTION>FINANCIAL STATEMENTS
<TEXT>
Document 4 - file: y48789a1ex99-c.txt

</DOCUMENT>
</SEC-DOCUMENT>