Sec Form 4 Filing - Meller Gary @ CHEMBIO DIAGNOSTICS, INC. - 2018-02-26

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Meller Gary 2. Issuer Name and Ticker or Trading Symbol CHEMBIO DIAGNOSTICS, INC. [ CEMI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1756 SE 9TH STREET 3. Date of Earliest Transaction (MM/DD/YY) 02/26/2018 (Street) FORT LAUDERDALE, FL33316 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/26/2018 M 36,875 ( 1 ) A $ 3.48 151,875 D Common Stock 02/26/2018 F 17,272 ( 1 ) D 134,603 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Options to purchase common stock $ 3.48 02/26/2018 M 8,750 06/19/2015 06/19/2019 Common Stock 8,750 $ 0 0 D Options to purchase common stock $ 3.48 02/26/2018 M 9,375 06/19/2016 06/19/2019 Common Stock 9,375 $ 0 0 D Options to purchase common stock $ 3.48 02/26/2018 M 9,375 06/19/2017 06/19/2019 Common Stock 9,375 $ 0 0 D Options to purchase common stock $ 3.48 02/26/2018 M 9,375 02/25/2018 06/19/2019 Common Stock 9,375 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Meller Gary 1756 SE 9TH STREET FORT LAUDERDALE, FL33316 X Signatures /s/ Gary Meller 02/27/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reporting person did not sell any shares of common stock. Rather, the reporting person exercised options to acquire 19,603 shares of common stock by submitting and relinquishing to the issuer options to purchase an additional 17,272 shares of common stock. These additional options to purchase 17,272 shares of common stock constituted the entire exercise price, using the 10-day volume weighted average trading price ended February 23, 2018 of $7.4297. As a result of this transaction, the reporting person increased his stock ownership by 19,603 shares of common stock and reduced the number of options owned by 36,875 (19,603 options exercised plus 17,272 options used to pay the exercise price for the 19,603 options exercised to purchase the 19,603 shares of common stock).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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