C-peptide test is an indicator used to test the function of pancreatic islets , which usually costs about 250 dollars, depending on each hospital. Due to the different situation of each hospital, the charges will also be different, C peptide test need to check fasting venous blood, drink sugar water 1 hour after the blood draw, 2 hours and then another blood draw, through the results of the pancreatic islet function judgment, the general price is just about 250 yuan. If the islet function release and c-peptide test are done at the same time, the price is relatively increased, and it may cost around $500; in general, you can choose only one of them to test. The cost of C-peptide test depends on the hospital situation and hospital grade, and you should ask for the test at the hospital.