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Iron (Serum or Plasma Mass Concentration)

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

This test measures the amount of iron present in your blood, typically drawn from a vein. Iron is an essential mineral that helps carry oxygen in your red blood cells.

Quick summary

["Iron levels help doctors check if you have too little or too much iron in your body."]

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

Key facts at a glance

LOINC
57988-8
Short code
Iron CSF-mCnc
Synonyms
Iron CSF-mCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Ref low
60
Ref high
170
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83540
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like extreme fatigue, pale skin, shortness of breath, or unusual tiredness. It could also be done to diagnose or monitor conditions such as anemia, hemochromatosis, or iron overload disorders.

What to Expect Before the Test

You will likely have a small needle inserted into a vein in your arm or hand. The blood sample will be drawn into a tube. This process usually takes a few minutes. You may feel a brief pinch or sting, but it’s generally not painful.

What to Expect During the Test

No special preparation is needed for this test. However, if you are on certain medications, such as blood thinners, your provider may advise you to stop them temporarily or adjust your dosage.

What the Results Mean

Results can vary based on your overall health, diet, and other factors. Low iron levels may indicate anemia or other conditions affecting iron absorption or use. High levels might suggest conditions like hemochromatosis or excessive intake.

Reference range

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

Specimen: csf

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.

Low iron levels can lead to anemia, causing fatigue, weakness, and pale skin. High iron levels can damage organs over time and increase the risk of heart disease or diabetes. Regular monitoring is important for patients with chronic conditions like hemochromatosis.

Short name

Iron Level

Frequently asked questions

What causes low iron levels?
Low iron levels can result from poor diet, chronic blood loss (such as heavy menstrual periods or gastrointestinal bleeding), or conditions that affect iron absorption in the intestines.
What causes high iron levels?
High iron levels are often due to genetic conditions like hemochromatosis, excessive iron supplements, or repeated blood transfusions.
How often should I get this test?
Your doctor will determine how often you need this test based on your health history, symptoms, and any diagnosed conditions. Regular check-ups may include periodic monitoring.
  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