• Alternative Names

    Hgb; Hb

    Normal Values

    Normal results vary, but in general are:

    • Male: 13.8 to 17.2 gm/dL
    • Female: 12.1 to 15.1 gm/dL

    Note: gm/dL = grams per deciliter

    Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

    What abnormal results mean

    Lower-than-normal hemoglobin may be due to:

    • Anemia (various types)
    • Bleeding
    • Destruction of red blood cells
    • Leukemia
    • Malnutrition
    • Nutritional deficiencies of iron, folate, vitamin B12, vitamin B6
    • Overhydration

    Higher-than-normal hemoglobin may be due to:

    • Congenital heart disease
    • Cor pulmonale
    • Dehydration
    • Erythrocytosis
    • Low blood oxygen levels (hypoxia)
    • Pulmonary fibrosis
    • Polycythemia vera

    Additional conditions under which the test may be performed:

    • Anemia of chronic disease
    • Drug-induced immune hemolytic anemia
    • Giant cell (temporal, cranial) arteritis
    • Hemoglobinopathies
    • Hemolytic anemia due to G6PD deficiency
    • Idiopathic aplastic anemia
    • Idiopathic autoimmune hemolytic anemia
    • Immune hemolytic anemia
    • Iron deficiency anemia
    • Paroxysmal cold hemoglobinuria (PCH)
    • Paroxysmal nocturnal hemoglobinuria (PNH)
    • Pernicious anemia
    • Placenta abruptio
    • Polymyalgia rheumatica
    • Secondary aplastic anemia