    <SEC-DOCUMENT>0000856982-18-000027-index.html : 20180531
    <SEC-HEADER>0000856982-18-000027.hdr.sgml : 20180531
    <ACCEPTANCE-DATETIME>20180531132801
    ACCESSION NUMBER:		0000856982-18-000027
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		6
    CONFORMED PERIOD OF REPORT:	20180531
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Submission of Matters to a Vote of Security Holders
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20180531
    DATE AS OF CHANGE:		20180531

    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:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-18592
    		FILM NUMBER:		18870884

    	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>8-K
    <SEQUENCE>1
    <FILENAME>a8-k5242018.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a8-k5242018.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>secondamendedandrestatedar.htm
    <DESCRIPTION>EXHIBIT 3.1
    <TEXT>
    Document 2 - file: secondamendedandrestatedar.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.2
    <SEQUENCE>3
    <FILENAME>thirdamendedandrestatedbyl.htm
    <DESCRIPTION>EXHIBIT 3.2
    <TEXT>
    Document 3 - file: thirdamendedandrestatedbyl.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>4
    <FILENAME>pressrelease5312018.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 4 - file: pressrelease5312018.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>a2015mmsilogoaa34.jpg
    <TEXT>
    Document 5 - file: a2015mmsilogoaa34.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>letterheadpressrelease.jpg
    <TEXT>
    Document 6 - file: letterheadpressrelease.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>