Cops arrested a doctor following illegal selling of oxycodone, a powerful painkiller, from his Massapequa office across a school.

Based on a tip off, detectives said drugs were bought from Dr Saji Francis without ever being examined or diagnosed.

Nassau County police commissioner Lawrence Mulvey, said, "Dr Francis is the antithesis of the hippocratic oath, to do no harm. His greed and total disregard for the ethics of the medical profession has exacerbated the opiate and heroin abuse in Massapequa."

The doctor charged anywhere from $480 to $600 for the prescriptions, according to authorities.

His clientele included several teenagers and he was selling the painkiller for the past five years from his Merrick Road office located across the street from Massapequa High School.

The doctor, who specializes as an internist, was arrested on Tuesday afternoon.

Francis was accused in First District Court in Hempstead on Wednesday on nine counts of criminal sale of a prescription. A judge ordered him held in lieu of $180,000 bond or $90,000 cash. The doctor faces a maximum of 15 years in prison if convicted. Additional charges were pending, sources said.

Mulvey, at a press conference on Wednesday afternoon, told reporters that by his own omission, Dr Francis admitted to selling Oxycodone prescriptions to at least 40 teenagers in the past six months.

Nassau County District Attorney Kathleen Rice said that the doctor's arrest was an important victory in the area's fight against drugs.