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Factor VII Activity (Serum/Plasma)

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

This test measures the activity level of Factor VII, a blood clotting protein that helps prevent excessive bleeding. It may be ordered if you have concerns about bleeding disorders or after trauma/surgery.

Quick summary

["Factor VII helps control bleeding; low levels may indicate bleeding risks or clotting disorders."]

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

Key facts at a glance

LOINC
3202-9
Short code
Fact VII+ACA Ag PPP IA-aCnc
Synonyms
Fact VII+ACA Ag PPP IA-aCnc
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
ia
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 recommend this test if you experience unusual bleeding (nosebleeds, bruising easily, heavy menstrual periods), have surgery or a medical procedure planned, or if you have a known bleeding disorder like hemophilia. It can also help monitor treatment for clotting disorders.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample drawn from a vein in your arm. If you’re on blood-thinning medication, let your doctor know before the test.

How the Test Works

Blood is collected and tested for Factor VII activity using a clotting assay. This measures how quickly the protein helps blood clot under controlled conditions.

Possible Results and Interpretation

Results are compared to a standard range for healthy individuals. Low Factor VII activity may suggest bleeding disorders, liver disease, or vitamin K deficiency. High levels may rarely be seen in certain genetic conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Factor VII plays a critical role in the intrinsic pathway of blood coagulation. Deficiencies can lead to spontaneous bleeding, especially in joints or muscles. Monitoring Factor VII activity helps diagnose bleeding disorders, assess liver function, or evaluate treatment responses in patients with inherited clotting deficiencies.

Short name

Factor VII Activity

Frequently asked questions

What causes low Factor VII levels?
Low Factor VII activity can result from liver disease (which affects protein production), vitamin K deficiency, certain medications (like anticoagulants), or inherited bleeding disorders. Rarely, it may occur after trauma or surgery.
What does a normal result mean?
A normal result indicates healthy Factor VII activity, meaning your blood clotting system is functioning as expected. However, your doctor may still recommend follow-up testing if you have symptoms of bleeding or a known risk factor.
Can Factor VII levels change with diet?
Dietary factors like vitamin K intake may indirectly affect clotting factors, but Factor VII itself is not directly influenced by diet. If you’re on blood-thinning medication, follow your doctor’s advice on dietary restrictions.
  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