Serum Iron (SerumFe)

This test is used to determine whether your blood iron level is normal This test is done if your caregiver thinks that you might have too little or too much iron in your blood. Low iron can cause anemia, and is usually due to long term or heavy bleeding, pregnancy, rapid growth (in children), and rarely due to a poor diet. A high iron level can be due to a genetic condition, extensive transfusions, or rarely due to ingestion of an overdose of iron (usually in children). In the direct serum iron test, the level of iron in your blood is directly measured. Iron is an essential trace element in your blood. It is necessary for forming healthy red blood cells, which carry oxygen through your body, and some enzymes, which perform tasks in your body. No single test is accepted for diagnosing iron deficiency (lack of iron). Other tests may be ordered at the same time. A serum iron test is usually ordered with a TIBC, except in suspected cases of iron poisoning, when it is unnecessary.


A blood sample is obtained by inserting a needle into a vein in the arm.


  • Male: 12-300 ng/mL or 12-300 mcg/L (SI units)

  • Female: 10-150 ng/mL or 10-150 mcg/L (SI units)

  • Child/adolescent:

  • Newborn: 25-200 ng/mL

  • 1 month: 200-600 ng/mL

  • 2-5 months: 50-200 ng/mL

  • 6 months -15 years: 7-142 ng/mL

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.


Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.


It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.