The victim was hit in the back while playing video games inside his home.
The gunman fired multiple rounds on the 1500 block of Adams Avenue just before 1:30 a.m. Monday.
Authorities on the scene said there were several other people inside the home where the teen was hit.
He's expected to recover.
Anyone with information can call or text Philadelphia police at 215-686-TIPS (8477) or submit an anonymous tip online.
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