The Manhattan V.A. Hospital — which was damaged severely by Sandy — will partly re-open next March, according to the U.S. Department of Veterans Affairs. But officials don't know when the heart of the 170-bed facility will come back online.

Resuming full-time care, including the ability to perform surgery and keep patients overnight, will require many more repairs, officials said.

Flooding from Sandy caused the "catastrophic failure" of many of the hospital's systems, including electricity, heat, water, elevators, fire protection and computers, according to the VA.

Patients are currently going to other VA facilities in all five boroughs.

Nearby, hard-hit Bellevue and NYU have already begun to accept patients for same-day, outpatient treatment.