X0206 3 2018-05-10 0 0001092662 CHEMBIO DIAGNOSTICS, INC. CEMI 0001740793 Potthoff John Gary 3661 HORSEBLOCK ROAD MEDFORD NY 11763 true None 0 D Option to Purchase Common Stock 8.15 2018-05-10 2023-05-10 Common Stock 9375 D Option to Purchase Common Stock 8.15 2019-05-10 2023-05-10 Common Stock 9375 D Option to Purchase Common Stock 8.15 2020-05-10 2023-05-10 Common Stock 9375 D Option to Purchase Common Stock 8.15 2021-05-10 2023-05-10 Common Stock 9375 D Option to Purchase Common Stock 8.15 2022-05-10 2023-05-10 Common Stock 9375 D No securities beneficially owned immediately prior to appointment Closing trading price on May 10, 2018, as reported by NASDAQ. /s/ John Potthoff 2018-05-16