    <SEC-DOCUMENT>0000856982-18-000060-index.html : 20180629
    <SEC-HEADER>0000856982-18-000060.hdr.sgml : 20180629
    <ACCEPTANCE-DATETIME>20180629152645
    ACCESSION NUMBER:		0000856982-18-000060
    CONFORMED SUBMISSION TYPE:	11-K
    PUBLIC DOCUMENT COUNT:		3
    CONFORMED PERIOD OF REPORT:	20171231
    FILED AS OF DATE:		20180629
    DATE AS OF CHANGE:		20180629

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MERIT MEDICAL SYSTEMS INC
    		CENTRAL INDEX KEY:			0000856982
    		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
    		IRS NUMBER:				870447695
    		STATE OF INCORPORATION:			UT
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		11-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-18592
    		FILM NUMBER:		18929100

    	BUSINESS ADDRESS:
    		STREET 1:		1600 WEST MERIT PARK WAY
    		CITY:			SOUTH JORDAN
    		STATE:			UT
    		ZIP:			84095
    		BUSINESS PHONE:		8012531600

    	MAIL ADDRESS:
    		STREET 1:		1600 WEST MERIT PARKWAY
    		CITY:			SOUTH JORDAN
    		STATE:			UT
    		ZIP:			84095
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>11-K
    <SEQUENCE>1
    <FILENAME>mmsi-1231201711xk.htm
    <DESCRIPTION>11-K
    <TEXT>
    Document 1 - file: mmsi-1231201711xk.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>2
    <FILENAME>exhibit231-2017.htm
    <DESCRIPTION>EXHIBIT 23.1
    <TEXT>
    Document 2 - file: exhibit231-2017.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a2015mmsilogoaa32.jpg
    <TEXT>
    Document 3 - file: a2015mmsilogoaa32.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>