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Also known as: Hgb; Hb; H and H (Hemoglobin and Hematocrit)
Formal name: Hemoglobin

At a Glance

Why Get Tested?

To evaluate the hemoglobin content of your blood as part of a general health checkup; to screen for and help diagnose conditions that affect red blood cells (RBCs); if you have anemia (low hemoglobin) or polycythemia (high hemoglobin), to assess the severity of these conditions and to monitor response to treatment

When to Get Tested?

With a hematocrit or as part of a complete blood count (CBC), which may be ordered as a component of a general health screen; when you have signs and symptoms of anemia (weakness, fatigue) or polycythemia (dizziness, headache); at regular intervals to monitor these conditions or response to treatment

Sample Required?

A blood sample drawn from a vein in your arm or by a fingerstick (children and adults) or heelstick (newborns)

Test Preparation Needed?