Medical information Clinical review pending

Haematology Testing

Antithrombin III Antigen Test

The Antithrombin III Antigen Test measures antithrombin III levels in the blood to help diagnose conditions that increase the risk of blood clots (thromboembolic disorders).

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: Blood sample collected in a specific tube (e.g., citrate tube). Confirm exact requirements with the laboratory before booking.
Results: Confirm turnaround time with the laboratory before booking.
Preparation: Overnight fasting is preferred. Avoid certain medications like anabolic steroids, gemfibrozil, heparin, asparaginase, estrogens, gestodene, and oral contraceptives for 3 days prior to the test. Consult your doctor before stopping any medication. A completed Coagulation Requisition Form (Form 15) and Test Send Out Consent Form (Form 35) are required. Confirm with the laboratory before booking.

Test priceKSh 56,000

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 Antithrombin III Antigen 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.

Talk to a claims advisor

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.

Have these ready when we check

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

Free coverage check

Ask us to verify your cover

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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Used only to process your coverage check — see our Privacy Policy. Verification support is free and does not guarantee your provider will pay.

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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.

✓Personal or family history of venous thromboembolism (VTE)
✓Unexplained blood clots (DVT or PE)
✓Patients being considered for long-term anticoagulation
✓Monitoring patients with known antithrombin III deficiency
✓Evaluation of patients with arterial thrombosis
✓Assessment before major surgery in high-risk individuals

In plain language

What this test helps you understand

This test helps identify individuals with antithrombin III deficiency, a condition that increases the risk of developing blood clots. It aids in the diagnosis of inherited or acquired thrombophilia (tendency to form clots) and guides decisions regarding anticoagulation therapy.

The Antithrombin III Antigen Test is a diagnostic tool used to measure the amount of antithrombin III protein in your blood. Antithrombin III is a natural anticoagulant, meaning it helps prevent blood clots from forming. Low levels of this protein can increase the risk of developing thromboembolic disorders, such as deep vein thrombosis (DVT) or pulmonary embolism (PE). This test is important for individuals with a personal or family history of blood clots, or those experiencing unexplained clotting events. Understanding your antithrombin III levels can help your doctor assess your risk and guide appropriate treatment or preventive measures. The test involves a simple blood draw.

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.

Ask about locations →

PreparationOvernight fasting is preferred. Avoid certain medications like anabolic steroids, gemfibrozil, heparin, asparaginase, estrogens, gestodene, and oral contraceptives for 3 days prior to the test. Consult your doctor before stopping any medication. A completed Coagulation Requisition Form (Form 15) and Test Send Out Consent Form (Form 35) are required. Confirm with the laboratory before booking.

SampleBlood sample collected in a specific tube (e.g., citrate tube). Confirm exact requirements with the laboratory before booking.

MethodologyThe test typically uses laboratory methods like nephelometry or ELISA to measure the concentration of antithrombin III antigen in the plasma.

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

Results can be affected by certain medications, pregnancy, liver disease, and other medical conditions. The test may not detect all types of thrombophilia. Interpretation requires clinical correlation. Confirm with the laboratory before booking.

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

Antithrombin III is a protein naturally produced by the liver that helps prevent blood clots by inhibiting certain clotting factors.

This test helps identify if you have a deficiency in Antithrombin III, which can significantly increase your risk of developing dangerous blood clots like DVT or PE.

Individuals with a personal or family history of blood clots, those who have experienced unexplained clotting, or those with specific risk factors may need this test.

The test requires a blood sample, which is collected by a healthcare professional. You may be asked to fast beforehand.

Your doctor will interpret the results based on your medical history and symptoms. Low levels indicate a potential deficiency and increased clotting risk.

Certain medications can affect the results. You should discuss any medications you are taking with your doctor and the laboratory before the test.

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.

Students & academic projects

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

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Trust & transparency

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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