A NYPD cop was arrested early Friday in the Bronx for allegedly assaulting his girlfriend, authorities said.

Jermack Romero, 39, is accused of scratching his 19-year-old girlfriend on the neck and arm during a squabble in his home near Oxford Avenue and Tulfan Terrace in the Kingsbridge section, cops said.

Romero was busted around midnight and charged with assault and criminal mischief, police said.

His girlfriend was treated on the scene, police said.

Romero was suspended without pay, authorities said.