Medical information Clinical review pending

Haematology Testing

Von Willebrand Factor Antigen vWF Ag Test

The Von Willebrand Factor Antigen (vWF Ag) Test measures the amount of von Willebrand factor in your blood. This test helps diagnose bleeding disorders, especially von Willebrand Disease (vWD), and guides treatment planning.

General information only: This page is not a diagnosis or personal medical advice. A qualified clinician should decide whether testing is appropriate and interpret results in context.

Review status: No completed medical review is recorded for this page.

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Counselor guidance included Confidential handling Kenya-wide coordination

At a glance

Plan your test

Sample: 3 mL whole blood collected in a blue top (sodium citrate) tube.
Results: Confirm with the laboratory before booking.
Preparation: Overnight fasting is preferred. Discontinue Heparin for 1 day and Oral Anticoagulants for 7 days prior to sampling, with your doctor's approval. A completed Coagulation Requisition Form (Form 15) is required.

Test priceKSh 26,000

Payment: M-Pesa and card options can be confirmed during booking.

Insurance & government schemes

Is this test covered for you?

We help you verify whether the Von Willebrand Factor Antigen vWF Ag Test test can be claimed against your insurer, employer scheme or a Kenyan government health scheme — before you book. Coverage depends on your plan, clinical indication and your provider's rules; final approval always rests with them.

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Providers & schemes we can help you check

Government & public schemes

SHIF — Social Health Insurance Fund Linda Mama EduAfya NHIF (legacy cards)

Eligibility and benefits follow the current rules of the Social Health Authority (SHA) and applicable government programmes.

Private insurers & employer schemes

Jubilee Health AAR APA Britam CIC Madison Resolution Pioneer Minet Old Mutual GA Life Heritage + other licensed insurers

Names shown for identification only — listing does not imply partnership or guarantee of coverage.

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Insurer or scheme name & policy / member number
A clinician's request / prescription for the test
Pre-authorisation letter, if your plan requires one

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Send your details and our claims team confirms what documents you need and whether pre-authorisation applies — usually the same working day.

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Start with fit

Is this the right test for you?

The best test starts with a clear clinical question. These are common reasons a clinician or family may consider this test.

✓Frequent or severe nosebleeds
✓Easy bruising
✓Prolonged bleeding from cuts or injuries
✓Heavy menstrual bleeding
✓Family history of bleeding disorders
✓Bleeding during or after surgery or dental procedures

In plain language

What this test helps you understand

This test helps diagnose von Willebrand Disease and other bleeding disorders by measuring the level of von Willebrand factor in the blood. It aids in assessing bleeding risk and guiding appropriate treatment strategies.

The Von Willebrand Factor Antigen (vWF Ag) Test is a diagnostic tool used to evaluate bleeding disorders, particularly von Willebrand Disease (vWD). This test measures the level of von Willebrand factor (vWF), a protein essential for blood clotting. Understanding vWF levels is crucial for diagnosing and managing conditions that cause excessive bleeding or bruising.

This test quantifies the amount of vWF present in your blood. Low levels can indicate a higher risk of bleeding. It is important for determining the right treatment approach for individuals experiencing bleeding symptoms.

If you frequently experience nosebleeds, bruise easily, have prolonged bleeding from cuts, or have heavy menstrual periods, your doctor might recommend this test. It's also considered for individuals with a family history of bleeding disorders or those preparing for surgery.

Medical review status

Clinical review pending

A completed medical review is not recorded for this page. No clinician has endorsed the information shown here. Please discuss testing decisions with a qualified healthcare professional.

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A simple process

What happens next?

You do not have to navigate the test alone. We help you move from question to next step.

Speak with us

We check the test and answer your questions before collection.

Give your sample

Choose home collection or a coordinated hub visit in Kenya. We explain whether this test uses a cheek swab or blood draw.

Understand your report

A counselor helps you understand the result and the next steps.

Choose your collection

Home collection or a lab visit

We will explain the sample, preparation, and next steps before anything is collected.

Home collection

Choose a coordinated visit at home or another convenient location. Our team confirms the appointment and sample requirements in advance.

Lab or hub visit

Prefer to visit a coordinated location? We can guide you to the right hub and explain what to expect when you arrive.

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PreparationOvernight fasting is preferred. Discontinue Heparin for 1 day and Oral Anticoagulants for 7 days prior to sampling, with your doctor's approval. A completed Coagulation Requisition Form (Form 15) is required.

Sample3 mL whole blood collected in a blue top (sodium citrate) tube.

MethodologyConfirm with the laboratory before booking.

PrivacyYour sample and report are handled confidentially. Ask the team how your information is stored and shared.

Results can be affected by certain medications and conditions. Discuss any medications you are taking or health conditions with your doctor before the test. Sample handling and transport are critical for accurate results.

Read your report

What common result terms mean

TermPlain-language meaning

PositiveA finding was identified. Your clinician or counselor will explain what it means for your care.

NegativeThe specific finding tested for was not identified. It does not rule out every possible cause.

VUSA variant was found, but current evidence is not enough to classify it. Your counselor can explain follow-up.

Questions people ask

Frequently asked questions

Von Willebrand factor (vWF) is a protein in your blood that plays a crucial role in helping blood platelets stick together and in carrying clotting factor VIII, both essential steps in blood clotting.

Von Willebrand Disease (vWD) is the most common inherited bleeding disorder. It is caused by a deficiency or dysfunction of von Willebrand factor, leading to problems with blood clotting.

Overnight fasting is preferred. Inform your doctor about all medications you are taking, especially blood thinners, as they may need to be stopped temporarily before the test. Ensure you have the required Coagulation Requisition Form.

A blood sample is drawn from a vein in your arm and collected in a specific blue-top tube containing sodium citrate.

Confirm with the laboratory before booking.

Your doctor will interpret the results in the context of your medical history and symptoms. Low levels of vWF Ag may indicate von Willebrand Disease or another bleeding disorder.

Collaboration

Open for partnership with hospitals, clinics, doctors & researchers

Whether you are referring patients, building a research programme or supporting students, we work as an extension of your team — with responsive communication and clear scientific standards.

Hospitals & clinics

Referral pathways, coordinated sample logistics and shared reporting that fits your clinical workflow.

Doctors & specialists

LOINC-coded reports, ACMG-based variant classification and a direct scientific line for complex cases.

Research institutions

Sanger sequencing, NGS panels and custom assays — with project design support, batch pricing and agreed turnaround commitments.

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Discounted laboratory services for college, master's and PhD research projects — including proposal guidance and cost-effective batch testing.

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Sources, standards & how this page is maintained

Standards & references

ACMG/AMP technical standards for sequence variant interpretation
ClinGen curation and gene–disease validity frameworks where applicable
LOINC-coded reporting for interoperable results
ISO 9001:2015 quality management; ISO 15189 accreditation in progress

Page provenance

Last updated: September 27, 2026
Medical review: not yet completed
Written for patients & clinicians in Kenya; reviewed periodically against current guidance

Medical disclaimer: this page is general information, not a diagnosis or personal medical advice. Testing decisions and result interpretation should be made with a qualified healthcare professional.

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