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Iron, Serum or Plasma Concentration (Prescribed Intravenous Iron Therapy Monitoring)

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

This test measures the amount of iron in your blood, often done if you’re receiving intravenous iron therapy or have signs of iron deficiency.

Quick summary

["Your iron levels help ensure your body has enough iron to make healthy red blood cells and support energy levels."]

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

Key facts at a glance

LOINC
72066-4
Short code
INTRAVENOUSIRONPRESCRIBED
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
60
Ref high
170
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
esrd
CPT
83540
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test to monitor how well your body is absorbing iron from intravenous (IV) therapy, check for iron overload, or assess iron deficiency symptoms like fatigue or pale skin.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. You may feel a slight pinch, but it’s quick and painless.

What the Results Mean

Results help determine if your iron levels are within a healthy range. Low levels may indicate anemia or poor iron absorption, while high levels could signal iron toxicity or excessive intake.

Common Reasons for Testing

This test is commonly used in patients receiving IV iron for conditions like anemia, chronic kidney disease, or those with malabsorption disorders.

Reference range

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

Specimen: serum

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.

Iron is essential for oxygen transport in red blood cells. Low levels can lead to fatigue, weakness, or shortness of breath, while dangerously high levels may cause organ damage or other complications. Monitoring helps prevent these risks.

Short name

Iron Level Check

Frequently asked questions

Will I need to fast before this test?
No fasting is required for this test. Blood is drawn at any time of day.
What does a low iron level mean?
A low iron level may suggest iron deficiency, which can cause fatigue, pale skin, or weakness. Your provider may recommend dietary changes, supplements, or further testing.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time.
  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