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Factor VII Activity (Prothrombin Complex Concentration)

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

This test measures how well your blood can clot by checking the activity of Factor VII, a protein essential for blood clotting.

Quick summary

["Factor VII activity helps assess bleeding risks and clotting function."]

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

Key facts at a glance

LOINC
49865-9
Short code
Fact VIII Act/Nor PPP Chro
Synonyms
Fact VIII Act/Nor PPP Chro
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
chromo
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 doctor may order this test if you have symptoms of bleeding problems, such as easy bruising, excessive bleeding from cuts, or unexplained nosebleeds. It may also be used before surgery to check if your blood clotting is normal. Additionally, it can help diagnose or monitor conditions like liver disease, which affects blood clotting proteins.

What to Expect Before the Test

No special preparation is needed. You may have a blood sample drawn from a vein in your arm, similar to a routine blood test. If you’re on blood thinners, let your doctor know before the test.

What the Test Results Mean

Lower than normal levels of Factor VII activity may indicate bleeding disorders, liver disease, or other conditions affecting clotting. Higher levels are less commonly significant unless related to specific medications or conditions.

Common Conditions Monitored

This test is often used to monitor bleeding risks in patients with liver disease, hemophilia, or those taking anticoagulants. It can also help guide decisions about surgery or invasive procedures.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Factor VII Activity

Frequently asked questions

What causes low Factor VII activity?
Low Factor VII activity can result from liver disease (where the liver doesn’t produce enough clotting factors), certain medications (like warfarin), vitamin K deficiency, or inherited clotting disorders. It may also appear after trauma or surgery.
How often should this test be repeated?
Your doctor will determine how often you need retesting based on your symptoms, treatment plan, and underlying conditions. Follow-up may be needed if you’re on medications affecting clotting or if you have ongoing bleeding risks.
Can lifestyle changes affect Factor VII activity?
While diet and lifestyle factors like smoking or alcohol use may indirectly impact liver function (which produces clotting proteins), they don’t directly alter Factor VII activity. Always discuss lifestyle changes with your healthcare provider.
  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