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DOC’S ‘GAY SEX’ SHOCK

A medical assistant is suing a group of Long Island doctors after allegedly being fired for refusing to cover for a physician she says had sex with his gay lover in the examination room.

Physician’s assistant Antoinette Lloyd, 48, claims she was fired in June 2006 after she refused to change records to falsely show that she was always present in an examination room with Dr. Benjamin Grundfast and a younger male patient.

Grundfast, an orthopedic specialist, “told me he had a sexual affair” with the man, sometimes having sex in the examination room, sometimes elsewhere, Lloyd said.

The doctor “told me he bought a wig and lingerie, so [the patient] could envision he was a girl” when they had sex, she said.

Grundfast, 57, is not a party in the lawsuit. Reached outside his office at Cardiology & Internal Medicine of Long Island, in Massapequa, he said only, “It’s not true.”

Lloyd charged that she was also asked to lie to state officials investigating Grundfast in an unrelated malpractice suit.

Lloyd said that when she refused to lie to investigators or alter patient records, she was told by an office manager, “If you aren’t going to be a team player and change the chart, then we have decided to let you go.”

But the firm’s lawyer, Michael DeSantis, denied all the charges and said the claims in the suit were “the desperate acts of a disgruntled former employee.”

Grundfast’s lawyer could be reached for comment.

kieran.crowley@nypost.com