Platelet Count Test
The Platelet Count test measures the number of platelets in a whole blood sample. Platelets must be present in adequate numbers, and function properly, to support normal blood clotting.
About this test
This test counts platelets in a whole blood sample, collected in an EDTA (lavender-top) tube and measured using electronic cell sizing, counting, cytometry or microscopy.
Platelets must be present in adequate numbers to aid in hemostasis, the process that stops bleeding. This test may be used to evaluate whether platelet numbers are adequate for that purpose.
Who might consider this test?
- Often having their clotting ability checked
- Whether because of symptoms like unusual bruising or bleeding
- As part of a broader blood count
Test details
| Quest code | 723 |
|---|---|
| Methodology | Electronic Cell Sizing/Counting/Cytometry/Microscopy |
| Sample type | Whole blood |
| Collection | Quest patient service center |
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Additional details
What this test looks at
The test reports one value: the number of platelets in a whole blood sample, collected in an EDTA (lavender-top) tube and measured using electronic cell sizing, counting, cytometry or microscopy. Platelets are the cells the body relies on for normal blood clotting, so this count is one of the basic measures used to evaluate hemostasis. Quest also lists the test under the names PLT Count and Thrombocytes Count.
Order online. No doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does a Platelet Count measure?
It counts the number of platelets in a whole blood sample, the cells the body relies on to help with normal blood clotting (hemostasis).
How is the sample collected?
Through a routine blood draw, collected in an EDTA (lavender-top) tube.
Do I need to prepare for this test?
No preparation instructions are listed for this test. If a clinician has given you instructions, follow those.
Is this the same as a PLT count?
Yes. Quest lists this test under the names PLT Count and Thrombocytes Count as well as Platelet Count.
How much does the Platelet Count, EDTA test cost?
The test is $5, plus $25 for the doctor's order and Quest blood draw. Total: $30. The $25 fee is waived at $149+. See how ordering works and our blood test cost guide.