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Erythropoietin (EPO) in Whole Blood

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of erythropoietin (EPO), a hormone produced by your kidneys that helps your body make red blood cells. It may be checked to assess kidney function or blood production.

Quick summary

["EPO helps regulate red blood cell production and can be influenced by kidney health or anemia."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
103953-6
Short code
HIF2A gene Mut Anl Bld
Synonyms
HIF2A gene Mut Anl Bld
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
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 of anemia, such as fatigue or pale skin, or if you have kidney disease. It can also help evaluate how your body responds to treatments like chemotherapy or radiation that might affect blood production.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or hand to draw a blood sample. The process is quick and usually causes only mild discomfort.

What the Results Mean

Results can help determine if your kidneys are producing enough EPO, which is important for maintaining healthy red blood cell levels. Abnormal results may indicate conditions like anemia, kidney disease, or certain cancers.

Common Conditions Affecting Results

High EPO levels might suggest conditions like polycythemia (too many red blood cells) or certain tumors. Low EPO levels could indicate kidney problems, anemia, or other blood disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Erythropoietin plays a critical role in red blood cell production and is closely tied to kidney function. Abnormal levels can signal underlying health issues that need medical attention, such as chronic kidney disease or blood disorders.

Short name

EPO Level

Frequently asked questions

What causes EPO levels to change?
EPO levels can be affected by kidney disease, anemia, dehydration, high altitude, or certain medications. Conditions like polycythemia vera (a blood disorder) or tumors can also lead to elevated EPO.
How often should I get this test?
Your doctor will determine the frequency based on your medical condition. For example, patients with kidney disease may need monitoring more often than others.
Can lifestyle changes impact EPO levels?
Yes, lifestyle factors like diet, hydration, and exercise can influence red blood cell production indirectly. However, EPO levels are primarily regulated by kidney function and hormonal signals.
  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 16, 2026. · Read our editorial policy