Police say Chad Michael Busto caused a scare during Barrymore's appearance at the 92nd Street Y on Monday.
He allegedly approached the stage during the event in Manhattan, and tried to talk to Barrymore.
Police say he was then spotted again Wednesday on the east end of Long Island, asking for directions for Barrymore's farmhouse.
She was not home at the time.
He was arrested Thursday by East Hampton police, on a misdemeanor stalking charge.
Busto, of Washington, D.C., pleaded not guilty in Southampton Town Justice Court Friday morning.
He was released without bail. He was ordered to stay away from Barrymore.
He will have to wear a tracking device for 60 days.
Busto will be back in court on September 12.
He has a lengthy criminal record of arrests from around the country, including for stalking, harassment and criminal trespass.
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