A Long Island pharmacy owner was busted yesterday for illegally supplying prescription pills to the drugged-out teen driver who wiped out a retired doctor as she mowed her front lawn.

Authorities hauled off Lutful Chowdhury, 61, of Westbury, and charged him with 14 felony forgery counts. He was arrested at the Aim Pharmacy in Baldwin, which he owns and where he is the supervising pharmacist.

He is accused of coaching his customers on how to steal or forge prescriptions so they can get their fixes.

Chowdhury’s pharmacy filled a stolen, forged oxycodone prescription for Kayla Gerdes, who was on the drug when she floored the gas pedal in a van, mounted a lawn and killed Dr. Rebecca Twine-Wright, 69, last year, authorities said.