Neutrophil Segment Count in Whole Blood (Automated Hematology)

Why This Test Might Be Ordered

Your healthcare provider may order this test to check for signs of infection, such as bacterial or fungal infections, or to evaluate conditions like inflammation, autoimmune diseases, or blood disorders. It can also help monitor treatment responses or identify risks before surgery.

What to Expect Before the Test

No special preparation is needed for this test. You’ll have a small needle inserted into your arm or hand to draw a small amount of blood. The process is quick and usually painless. If you’re nervous, let your healthcare provider know—they can offer options to make it more comfortable.

What the Test Results Mean

Results show the percentage or absolute count of neutrophils in your blood. While reference ranges vary by lab, higher-than-normal counts may indicate infection or inflammation, while lower counts could suggest immune suppression or certain blood disorders. Your provider will discuss results with you in detail.

Common Conditions Affecting Neutrophil Levels

High neutrophil counts may be linked to infections, chronic inflammation, or stress. Low counts can occur with certain medications, autoimmune diseases, or severe infections. Your provider will consider your full medical history and other test results when interpreting results.