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Factor VII Activity (Serum)

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

This test measures the activity level of Factor VII, a clotting protein in your blood. It helps assess bleeding risks or clotting disorders.

Quick summary

["Factor VII helps control bleeding by aiding clotting; low levels may indicate bleeding disorders or liver issues."]

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

Key facts at a glance

LOINC
51890-2
Short code
Fact VIII Gvn BPU
Synonyms
Fact VIII Gvn BPU
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Doctors may order Factor VII testing if you have unexplained bleeding, bruising, or blood clots. It’s also used to monitor conditions like hemophilia or liver disease that affect clotting proteins.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re on blood thinners, inform your doctor beforehand.

What the Results Mean

Results show how much Factor VII is active in your blood. Very low levels may mean bleeding risks, while very high levels could indicate clotting risks or certain medications.

Common Conditions Affecting Results

Low Factor VII can stem from liver disease, vitamin K deficiency, or inherited clotting disorders. High levels may result from liver disease, certain medications, or acute bleeding.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Factor VII Level

Frequently asked questions

What causes Factor VII to be low in my blood?
Low Factor VII can be due to liver disease (which affects protein production), vitamin K deficiency, certain medications (like anticoagulants), or inherited bleeding disorders like hemophilia.
How long does it take to get my Factor VII test results?
Results are typically available within 1–3 business days, depending on your lab. Your doctor will discuss them with you.
Can I eat or drink before this test?
You can eat and drink normally, but avoid heavy meals right before the draw to minimize discomfort. No fasting is required.
  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