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Hemoglobin (Hb) CPT: 85018

Expected Turnaround Time

Within 1 day

Specimen Requirements

Specimen

Whole blood

Volume

Tube fill capacity

Minimum Volume

0.5 mL (500 μL for pediatric microtainer capillary tubes; fill tube to capacity.)

Container

Lavender-top (EDTA) tube

Collection

Invert tube 8 to 10 times immediately after tube is filled at the time of collection.

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements

Temperature Period
Room Temperature 1 day
Refrigerated 3 days
Frozen Unstable
Freeze/thaw/ cycles Unstable

Patient Information

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.

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.

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