Hi Fuzzysofa - Happyelf is right - MOST Doctors will make you see them first and then usually again after the test.
If the price of a Liver Panel Blood test is of concern, you can get an accurate one without a Doctor by using "Health Tests Direct" (contact via the internet).
After you purchase "the test" (which you can pay for with a credit card) they email you a form and give you the address of a professional blood draw lab near your location (with 10 miles usually). You dont even need to make an appointment. Just print out and take the Email authorization to the blood draw lab, they do the test, and mail the sample to a professional lab via overnight mail, and then you get emailed with 24 hours with the results (showing which enzymes are in the "normal range" and which are not).
The whole thing costs about $25, thats for Everything.....Good Luck