Lab test · Hematology
Protein S Antigen
The Protein S Antigen test measures the level of protein S in the blood to assess clotting function and detect risk of abnormal blood clots.The Protein S Antigen test measures the level of protein S in the blood to assess clotting function and detect risk of abnormal blood clots.
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Free home collection Report in 7 days
ReportWithin 7 days
SampleBlood
CollectionHome or centre
FastingNot needed
How it works
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Book in a minute
Add to cart, pick a date and time slot, pay at the centre or at collection.
2
Sample collected at home or centre
A trained phlebotomist arrives in your slot with sealed, single-use kits.
3
Report on WhatsApp
Within 7 days on WhatsApp and under My Orders.
Preparation
No special preparation needed unless your doctor advises otherwise.
About this test
The Protein S Antigen test measures the level of protein S in the blood to assess clotting function and detect risk of abnormal blood clots.
The Protein S Antigen test is a blood test used to measure the amount of protein S, a natural anticoagulant that helps regulate blood clotting. Protein S works along with protein C to prevent excessive clot formation in blood vessels.
Low levels of protein S may increase the risk of developing abnormal blood clots (thrombosis), which can lead to serious conditions such as deep vein thrombosis (DVT) or pulmonary embolism. Deficiency may be inherited or acquired due to medical conditions, pregnancy, or certain medications.
Test Recommended For
- Individuals with a history of blood clots
- Patients with unexplained thrombosis
- People with family history of clotting disorders
- Individuals with recurrent miscarriages
- Patients advised for coagulation testing
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Questions people ask
How soon will I get my report?
Your report is usually ready within 7 days of sample collection — on WhatsApp and under My Orders.
Is home sample collection available?
Yes. A trained phlebotomist visits your home with sealed, single-use kits. Home collection is free.
Do I need to fast or prepare?
No fasting is required for this test unless your doctor advises otherwise.
How do I pay?
Pay at the centre or at the time of collection — cash, card or UPI. The price you see is what you pay — it includes the report, with no hidden charges.
Is the lab accredited?
Yes. Prima Diagnostics runs NABL-certified labs with strict quality control across 7 centres in Bengaluru.
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