Moonbeam, your Doc writing to the consultant is standard practice. Two years ago, when I had an ultrasound scan for suspected gallstones, extensive liver fat was found. My GP did a liver function test which was normal but wrote to the specialist re liver fat. Don't forget GP stands for General Practitioner, meaning they don't know everything about everything. The specialist then wrote back giving suggestions as to what might be the cause. My GP then did other tests which ruled out the serious causes and it was decided it was just because I am overweight.
So don't panic, chances are the cause is no big deal. I'm sure that if the result was very high he would have sent you straight to the specialist.