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Complete Blood Count | CBC

Your healthcare provider may order laboratory testing to better understand your overall health.

What is a CBC test?

A complete blood count (CBC) test can be used screen for a range of conditions and diseases, such as bleeding problems, leukemia, infection, anemia and others. It is a panel of blood tests that check on three types of cells found in your blood:

  • White blood cells, which help fight off infection.
  • Red blood cells, which carry oxygen to different parts of your body.
  • Platelets, which help your blood clot.
  • Why do I need a CBC test?

    A complete blood count is a very common test and usually done during a regular health checkup. Your healthcare provider may also order this test if:

    • You are feeling tired, bruising or bleeding, feeling weak or showing other signs of infection.
    • You are having special medical treatment that can affect blood cell counts.
    • You have been diagnosed with a disease that affects blood cells.

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     A health professional trained to draw blood will take a sample of your blood using a needle.

    The needle stick is quick and is usually taken from your arm. 

    You might feel a quick sting or pinch.

    You can eat and drink normally before the test unless told otherwise by your healthcare provider.

    The results are sent directly to your healthcare provider. You may get a phone call from the office to let you know the results. You may also get the results in a letter or in your electronic medical record. If you have questions about the results, contact your healthcare provider's office.