Peter Hore, the so-called serial pest, has maintained his innocence after appearing in a Sydney court accused of assaulting a law enforcement officer at the Independent Commission Against Corruption (ICAC).

Hore, who is well known for disrupting major events, was dragged out of the public gallery at ICAC hearings on April 4 by six staff after he started screaming out.

ICAC had been investigating Australian Water Holdings (AWH), a company linked to disgraced former Labor MP Eddie Obeid.

During the fray, Hore screamed at Commissioner Megan Latham about his "housemate being murdered", saying "don't assault me" and "I'm Peter Hore, serial pest".

One officer fell and hit his head during efforts to remove Hore and was taken to hospital.

Court papers say the officer suffered bruising, swelling, pain and dizziness.

Hore is charged with assaulting the officer and behaving in an offensive manner.

This morning, as his case was dealt with before Sydney's Downing Centre Local Court, Hore read the newspaper and muttered to himself.

His solicitor, Andrew Justice, said an application would be made for the case to be dealt with under the Mental Health Act.

In the meantime, Hore's bail has been continued until he faces court again.

Outside court the 54-year-old said he would fight the charges.

"What they say is false... the ICAC is corrupt," he told reporters.

He claims ICAC staff assaulted him.