Bomb technicians from the FBI and Los Angeles County Sheriff's Department went to the hospital around 7 a.m. Monday after a 66-year-old man handed over the object. The man said he found it in a bathroom.
FBI spokeswoman Laura Eimiller says it was reported to be a practice grenade.
Patients and staff were cleared from the emergency room for about two hours until experts could examine the device. Greater Los Angeles VA Police Chief Ed Casey says an X-ray determined that the grenade was inert.
No injuries are reported and no arrests were made.