This test measures the amount of a specific T-cell, CD4, in the blood. T-cells are a type of white blood cell that has several functions.
T-cells are a type of white blood cell that has several functions, including helping the body fight infection. A CD4 test measures the amount of a specific T-cell, CD4, in the blood.
Your healthcare provider may order this test if you have been diagnosed with diagnosed with HIV infection and they want to check:
In an adult, the blood sample is taken from a vein in the arm.
This care path's costs do not include the charge to draw blood from a vein (venipuncture). There will only be one charge to draw blood, even if multiple tests are being performed on the samples that are taken.
What should I ask my healthcare provider before having this test?
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