Berte Calvin, 88, was last seen at about 1:30 p.m. Wednesday when she left Kaiser Permanente Vallejo Medical Center at 975 Sereno Drive.
Lt. Herman Robinson said Calvin was visiting a family member at the hospital and left about an hour before her son arrived.
Calvin is described as 5 feet 5 inches tall and 135 pounds. She was last seen wearing an orange jacket and brown pants.
Robinson said Calvin was driving a red 2010 Chevrolet Impala with California license plate No. 6JIN714.
Calvin suffers from mild dementia, but family members told police she normally gets around well.
https://patch.com/california/benicia/amp/27366054/elderly-benicia-woman-goes-missing-vallejo-police