Police were called to Merrielands Crescent, Dagenham, at 5.45pm on Monday, 25 October by London Ambulance Service to reports of stabbing.
A 16-year-old boy was found with stab wounds.
He was treated by paramedics at the scene before being taken to the hospital.
His condition is not life-threatening or life-changing.
There have been no arrests. A crime scene has been put in place.