A 62-year-old Oceanside nanny saved the baby boy she was caring for by pushing his stroller out of the way of an oncoming vehicle Thursday afternoon in Rockville Centre, authorities said.

The woman, who is being treated at South Nassau Communities Hospital, is in a medically induced coma, Lt. James Vafeades of the Rockville Centre Police Department said.

“Witnesses said she pushed the baby out of the way and took the hit,” Vafeades said of the nanny, calling her a hero.

Vafeades said he is usually reluctant to use the term “hero” as it can be overused, but added that it applies in this case.

“I was skeptical, but — and this is not coming from the cops, but from witnesses — she really pushed that baby out of the way,” he said.

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The child, a 9-month-old boy, was unharmed. His stroller came to rest safely at a curb. Paramedics examined him at the scene.

The crash occurred around 2:48 p.m., he said.

The nanny, whose name was not released, was pushing the stroller north on Hempstead Avenue when she was hit by a woman making a left turn at a green light at North Village Avenue.

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The nanny had the right of way, Vafeades said. The driver was supposed to yield to pedestrians, “but it’s not criminal,” he added.

As a result, he said, the driver will not be charged.