The incident happened about 11 p.m. near 11th Street and Orange Avenue. Police said neighbors heard things being thrown in the apartment and a woman crying and saying "No."
Authorities said 20-year-old Jonathen Cabrera of Long Beach was "highly agitated and yelling" at officers who arrived at the scene. Officers said Cabrera cussed at them, threatened to kill them and slammed the door in their face.
Cabrera then allegedly broke a window in the front of the house. The officers took cover behind nearby parked cars and ordered him to come out with his hands up, but Cabrera allegedly refused.
Cabrera then simulated pulling out a gun from his waistband, causing the officers to shoot him in self defense, authorities said.
Police say the woman, Elizabeth Bustamante, was not in the room when the shooting happened. She came out of the house unharmed.
"I just walked out with my hands up and I walked all the way through to the front," Bustamante said with tears in her eyes. "I was scared to come out of the room because there were just too many shots and I didn't know if they would shoot me."
Sometime later, Cabrera surrendered to police without incident.
Bustamante, who is Cabrera's fiancée, said it was excessive force. She said there are more than 30 bullet holes in her apartment.
"It just looked like a terror attack in here," she said.
Authorities said no weapon was found inside the house.
Cabrera was taken to an area hospital to be treated for non life-threatening gunshot wounds to his upper torso.
Bustamante denied any domestic violence occurred, police said.
The Los Angeles District Attorney's Office and the Long Beach Police Department were investigating the shooting.