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Serum Iron Concentration

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of iron present in your blood serum, which helps assess iron status and identify potential deficiencies or excesses.

Quick summary

["Iron levels help detect anemia or iron overload that may require medical attention."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
33824-4
Short code
Iron Ur-sCnc
Synonyms
Iron Ur-sCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
60
Ref high
170
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83540
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test if you have symptoms like fatigue, pale skin, weakness, or if they suspect conditions like anemia, hemochromatosis, or other iron-related disorders. It’s also used during pregnancy or if you’re taking certain medications that affect iron absorption.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it’s part of a broader iron panel. Bring any medications you’re currently taking to your appointment.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a brief sting, but the process is quick and typically painless. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to standard ranges for your age, gender, and overall health. Low levels may indicate iron deficiency, while high levels could suggest conditions like hemochromatosis or excessive iron intake.

Reference range

NCBI: Serum Iron Male 65-180; Female 50-170 µg/dLN/A

Specimen: urine

Fasting for 12 hours preferred. Iron supplements should be stopped 24 hours before if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Iron Level

Frequently asked questions

Will I Need to Avoid Certain Foods or Drinks Before the Test?
If fasting is required (common for iron panels), avoid caffeine, alcohol, or large meals 8–12 hours before your appointment. Iron-rich foods or supplements may also be restricted; follow your doctor’s instructions.
How Long Will It Take to Get My Results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will discuss them with you during a follow-up visit.
Can I Take Iron Supplements While Waiting for My Test Results?
If your doctor hasn’t advised against it, you may take iron supplements as prescribed, but avoid self-medicating. High doses can interfere with test accuracy or cause side effects like nausea or constipation.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy