The test for ferritin and comprehensive metabolic panel can be both reported even if they are both performed for they have different functions. Ferritin test is perform when you have low hemoglobin and hematocrit for this test measures the amount of ferritin, which is a protein that controls iron storage in the body.
Meanwhile, comprehensive metabolic panel help see how well your liver and kidneys are working. In addition, it also measure your electrolyte and acid/base balance, your blood sugar and your blood proteins.