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Factor VII Activity (Prothrombin Complex Concentration)

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

This test measures the activity level of Factor VII, a protein essential for blood clotting. Low levels may indicate bleeding risks or clotting disorders.

Quick summary

["Factor VII helps control blood clotting; abnormal levels may signal bleeding or clotting issues."]

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

Key facts at a glance

LOINC
95121-0
Short code
Fact VIII Act + Inhib Pnl PPP Chro
Synonyms
Fact VIII Act + Inhib Pnl PPP Chro
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
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 Is This Test Done?

Your doctor may order this test if you have symptoms of bleeding (e.g., excessive bruising, nosebleeds, or prolonged bleeding after surgery) or if you’re taking blood-thinning medications. It may also be checked before certain procedures to assess clotting risk.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from a vein in your arm. If you’re on blood thinners, discuss this with your provider before the test.

What the Results Mean

Results are compared to a standard range. Very low levels may mean a bleeding disorder, while very high levels could indicate liver disease or other conditions. Your doctor will interpret results in the context of your health.

Common Causes of Abnormal Results

Low Factor VII activity can result from liver disease (since it’s made in the liver), blood-thinning medications, vitamin K deficiency, or certain genetic disorders. High levels may rarely occur with liver dysfunction or overproduction of clotting factors.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Factor VII is part of the intrinsic and extrinsic pathways of blood clotting. Deficiencies can lead to increased bleeding risk, especially in trauma, surgery, or after dental work. Monitoring is critical for patients on anticoagulants or those with inherited clotting disorders.

Short name

Factor VII Activity

Frequently asked questions

What triggers a Factor VII test?
A doctor may order this test if you have unexplained bleeding, are taking anticoagulants, or have symptoms like easy bruising or prolonged bleeding from cuts.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time.
Can lifestyle changes affect Factor VII levels?
While diet and exercise don’t directly alter Factor VII levels, certain medications (like warfarin) or liver conditions may. Always follow your doctor’s advice regarding supplements or medications.
  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