('disapproving') She had a reputation for being an 'ambulance chaser'. [=a lawyer who gets clients by convincing accident victims that they should file a lawsuit about the accident]
She was taken 'by ambulance' [=in an ambulance] to the hospital.
They called (for) an 'ambulance'.
(..) Don't you move. He's got a gun. Get back from the door. You shot him. Someone... Someone call an ambulance! He's dead. We thought you knew. How did you let this get so out of hand? He wouldn't listen to me. (..)1997 The Game
(..) It's not impossible to trace but it'll take time. The photo, the gun, the clown, the ambulance. It's all pending. Breaking and entering we've got solid. Malicious mischief, vandalism, harassment. But that's all. (..)1997 The Game