('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'.
(..) Yeah. In the spring, on a day like any other... I'll be back in an hour! Honey! Gotta call the ambulance! The baby is coming. Operator, I need an ambulance! Everyone's fine. She's a perfectly healthy baby girl. Honey... (..)2008 The Curious Case of Benjamin Button