It is always instructed to a patient to not eat any meal before getting your blood test because it may always interfere with the results. If you ate a meal before getting your blood drawn, your results will be high and after consulting your doctor, he would probably prescribed you medications on how to lower it. Lab technician wouldn't really know if you cheated unless they ask you if you had eaten before getting your blood drawn and if you admit it, they'll probably reschedule your blood test and explain what might be affected if you taken a meal before the test.
The CPT code reported for the visit is the physical exam
code. This is chosen base on the status of the patient and the patient’s age.
With the help of the URI, there is a capability of reporting the status of the
patient’s visit. This code will be reported because of the visit that had occurred
on the patient.