The journalist alleged Malik pushed the channel's cameraman down a flight of stairs. She said he also smashed their mobile phones.
Malik, who denied that he had assaulted her, said the reporter did not seek permission to enter his bedroom.
The chairman of the Jammu and Kashmir Liberation Front (JKLF) said he had taken away her mobile phone because he thought she was using it as a recorder.
"She had lied to my sister that she had an appointment with me. The fact is she never called for an appointment," he told reporters at a press conference here.
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"Is this journalism? The Indian media has raped journalistic ethics," he said.
A senior police official said the police had received a complaint.
"After studying it, we will take action. The law will take its own course," he said.
The journalist later said she and the cameraperson had made a "legal and ethical entry" into his house.
"Malik could have asked us to leave the location. Instead, he smashed our mobile phones. He assaulted the cameraperson, and pushed him from the stairs."
She said he had accused them of trying a "sting operation" on him.
Malik was also asked at the conference about the NIA registering a case on the funding of separatist leaders.
"I am not concerned with what NIA has to do," he said.