Hemoglobin (Hb) A1c CPT: 83036


Glycated Hemoglobin

Hgb A1c

Test Includes

Percent of saturation; serum iron; total iron binding capacity; unsaturated iron binding capacity

Expected Turnaround Time

Within 1 day

Specimen Requirements


Whole blood


4 mL

Minimum Volume

Pediatric EDTA whole blood tubes may be used. Please place original labeled capillary tube in a labeled transport tube for shipment to the laboratory.


Lavender-top (EDTA) tube, green-top (lithium heparin) tube, or gray-top (sodium fluoride) tube.


The usual precautions in the collection of venipuncture samples should be observed. The sample must be free of clots. Samples with any hematocrit disorders can lead to erroneous results. Send the entire tube to the laboratory.

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements

Temperature Period
Room Temperature 24 hours
Refrigerated 2 weeks
Frozen Do Not Freeze
Freeze/thaw/ cycles Do Not Freeze

Patient Information

To help determine whether you are at an increased risk of developing diabetes; to help diagnose diabetes and prediabetes; to monitor diabetes and to aid in treatment decisions.

As part of a health checkup or when you have risk factors for or symptoms of diabetes; after first diagnosis with diabetes, every 3-4 months or about 120 days to ensure that your glycemic goals are met and/or maintained or when your therapy plan has changed.

A blood sample is obtained by inserting a needle into a vein or a drop of blood is taken from a finger by pricking it with a small, pointed lancet.