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Lab test

Red Blood Cell Count Test

This test measures the number of red blood cells in a whole-blood sample. It is part of a complete blood count and can be ordered through Celio Health.

Blood drawQuest patient service center

About this test

The test analyzes a blood sample collected in an EDTA (lavender-top) tube, using electronic cell counting, cytometry or microscopy to determine the number of red blood cells present. It reports a single count.

Quest lists this measurement as part of a complete blood count, used as a screening test for conditions such as anemia, leukemia and inflammatory processes. A red blood cell count on its own is one piece of a complete blood count picture, which is why it is commonly read alongside the other values that make up that panel.

Test details

Quest code783
MethodologyElectronic Cell Sizing and Counting/Cytometry/Microscopy
Sample typeWhole blood full EDTA tube
CollectionQuest patient service center

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Quest resources

Additional details

What this test looks at

The test reports one value: the number of red blood cells in a whole-blood sample. Quest lists this measurement as part of a complete blood count, used for monitoring or screening, not diagnosis on its own, for conditions such as anemia, leukemia and inflammatory processes.

Order online and a physician order is included — 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 this test measure?

It measures the number of red blood cells in a whole-blood sample, using electronic cell counting, cytometry or microscopy.

How is the sample collected?

The test uses a whole-blood sample collected in a full EDTA tube from a routine blood draw.

Do I need to prepare for this test?

No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.

Why might a clinician order a red blood cell count?

Quest lists it as part of a complete blood count, used as a screening test for conditions such as anemia, leukemia and inflammatory processes.

Is a red blood cell count the same as a complete blood count?

No. It is one measurement that is commonly reported as part of a complete blood count, which includes several other values.

What does a Red Blood Cell Count test cost without insurance?

$5. Celio Health's price is a flat cash price and insurance is never billed: the required physician's order is included.

Last updated 2026-09-18 · How we write about lab testing

Educational content

This page is for general educational purposes only. It is not medical advice, and it is not a substitute for consultation with a qualified healthcare professional. Laboratory results should always be interpreted by a licensed clinician who knows your health history. Laboratory tests of this kind are used for screening and monitoring, not for diagnosis on their own — a diagnosis can only be made by a licensed clinician who evaluates results in the context of your health history and examination. If you have questions about your health or your results, talk with your doctor. If you think you may be experiencing a medical emergency, call 911.