The little girl, aged between eight and 10, was found a few weeks ago in a forest in Uttar Pradesh.
Doctors said she could not communicate and displayed "monkey-like" traits.
A senior police official told BBC Hindi she had been playing with a pack of monkeys and imitating their behaviour when police went to rescue her.
The little girl was spotted by villagers in the Katarniaghat wildlife sanctuary, on the Indian border with Nepal.
The police official, Suresh Yadav, said the monkeys attacked his squad when they arrived to take her away.