The East Anglian air ambulance has been called to a patient in Dereham.
The Anglia One aircraft was dispatched from Norwich at 12.02pm.
It landed in Toftwood, Dereham.
A spokesperson for the air ambulance service said no further information could be given at this time.
A spokesperson for the East of England ambulance service said: 'We were called to reports a patient was choking in Shipdham Road, Dereham, at 11.56am on 15th October.
'A rapid response vehicle, ambulance and the East Anglian Air Ambulance attended the scene. The patient was taken to hospital for further treatment.'
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