Little Maxlee Gell was riding with his mother, Natalia, on the third floor shortly after 7 p.m. when he stooped to pick up a bottle of water he dropped and "his finger got caught in the escalator," the mom said.
Cops rushed the severed digit on ice to Bellevue Hospital, where doctors were attempting to reattach it last night.
Macy's spokeswoman Elina Kazan said the escalators are properly maintained but declined to comment on anything specific because the accident is under investigation.