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UNITED STATES Securities and Exchange Commission Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or 0 TRANSITION REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to CHEMBIO Commission File No.0-30379 DIAGNOSTICS , INC . CHEMBIO DIAGNOSTICS , INC . ( Exact name of registrant as specified in its charter ) Nevada ( State or other jurisdiction of incorporation or organization ) 555 Wireless , Boulevard , Hauppauge , NY ( Address of principal executive offices ) Title of each class Common Stock , $ 0.01 par value 88-0425691 ( I.R.S. Employer Identification No. ) Registrant's telephone number , including area code (631)924-1135 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol CEMI 11788 ( Zip Code ) Name of each exchange on which registered The NASDAQ Stock Market LLC Securities registered pursuant to Section 12 ( g ) of the Act : None ( Title of Class ) Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by checkmark whether the registrant has filed a report on and attestation to it's management's assessment of the effectiveness of internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Yes No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No