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Factor VII Activity (Blood Coagulation Factor VII)

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

This test measures the activity level of Factor VII, a protein involved in blood clotting. Low levels may indicate bleeding disorders or liver issues.

Quick summary

["Factor VII helps control bleeding by promoting blood clot formation; low levels can increase risk of excessive bleeding."]

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

Key facts at a glance

LOINC
10395-2
Short code
Fact VIII Gvn
Synonyms
Fact VIII Gvn
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 Is This Test Done?

Your doctor may order this test if you have symptoms of bleeding problems (e.g., easy bruising, prolonged bleeding from cuts) or if they suspect a liver condition that affects blood clotting. It may also be used before surgeries or procedures to assess clotting risk.

What Does a Low Level Mean?

Low Factor VII activity suggests potential bleeding disorders, liver disease, or vitamin K deficiency. Severe deficiency can lead to spontaneous bleeding, while mild deficiencies may only cause issues under certain conditions (e.g., surgery).

What Does a High Level Mean?

High Factor VII activity is less common but may occur in certain genetic conditions or as a side effect of medications. It is generally not associated with bleeding risks but should be monitored if present.

How Is This Test Performed?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it is analyzed to measure Factor VII activity using a specialized coagulation test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Factor VII plays a critical role in the intrinsic and extrinsic pathways of blood coagulation. It works with other clotting factors to convert fibrinogen into fibrin, which forms the structural framework of blood clots. Abnormal levels can indicate underlying liver disease, inherited bleeding disorders (e.g., hemophilia), or conditions affecting vitamin K metabolism. Monitoring Factor VII is particularly important in patients with liver cirrhosis, those on anticoagulant therapy, or those preparing for surgery.

Short name

Factor VII Level

Frequently asked questions

What causes low Factor VII levels?
Low Factor VII levels can result from liver disease (e.g., cirrhosis), vitamin K deficiency, certain medications (e.g., anticoagulants), or inherited bleeding disorders. Rarely, it may also be caused by autoimmune conditions or severe malnutrition.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing schedule. Your doctor will discuss the findings with you during your follow-up visit.
Can lifestyle changes affect Factor VII levels?
While lifestyle factors like diet or exercise generally do not directly affect Factor VII levels, they can indirectly impact liver health or vitamin K status. For example, a balanced diet rich in vitamin K (found in leafy greens) may support normal clotting function, but this test specifically measures Factor VII activity, not broader vitamin K status.
  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