Iron (Serum or Plasma Mass Concentration)
This test measures the amount of iron present in your blood, which is important for making hemoglobin—the protein in red blood cells that carries oxygen throughout your body.
["Iron levels help assess whether you have too little or too much iron in your blood, which can affect energy, anemia, or other health conditions."]
Key facts at a glance
- LOINC
- 50203-9
- Short code
- Iron sp6 SerPl-mCnc
- Synonyms
- Iron sp6 SerPl-mCnc
- 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
- 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 Might Be Ordered
Your healthcare provider may order this test if you have symptoms like fatigue, weakness, pale skin, or shortness of breath, which can be signs of low iron (anemia). They might also check iron levels if you have conditions like heavy menstrual bleeding, poor diet, or certain medical treatments that affect iron absorption or storage.
What to Expect Before the Test
This test is typically done by drawing blood from a vein in your arm. You may feel a slight pinch when the needle is inserted, but it usually takes only a few minutes. No special preparation is needed unless your provider instructs otherwise.
What the Results Mean
Results help determine if your iron stores are adequate, low, or high. Low iron can lead to anemia, while high iron levels may indicate conditions like hemochromatosis or excessive intake.
Common Conditions Linked to Iron Levels
Low iron (hypochromic anemia) is common in people with poor diets, heavy periods, or conditions like celiac disease or gastrointestinal bleeding. High iron levels can be linked to genetic disorders, repeated blood transfusions, or excessive iron supplements.
Reference range
NCBI: Serum Iron Male 65-180; Female 50-170 µg/dLN/A
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.
Clinical Significance
Short name
Iron Level
Frequently asked questions
What causes my iron levels to be abnormal?
How often should I get this test?
Can I adjust my diet or supplements to affect iron levels?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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