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Laboratory Test Directory

Hemoglobin A1c


Name Method Department Units
Hemoglobin A1c High performance liquid chromatography
Core Lab, Hematology %

Battery Members

Hb A1c Level, Mean Blood Glucose

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 3 mL

Purple tube (EDTA)

Micro sample tube 0.5 mL

Refrigerated - 7 day(s)
Room temperature - 72 hour(s)

Specimen Preparation

  • Mix by gentle inversion immediately after collection
  • Transport to the lab immediately after collection
  • Do not centrifuge

Reasons for Rejection

  • Frozen specimen
  • Wrong collection tube
  • Non EDTA specimen
  • Delayed or improper handling


The Mean Blood Glucose is calculated from the Hemoglobin A1c result, based on current recommendations from the American Diabetes Association. It reflects the average glucose for the previous three months, but is more heavily weighted to the previous 30 days. Testing is no longer performed STAT.

CPT Code

  • 83036