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Hemoglobin A1C Confirmation Test
Test CodeLAB6056
Quest Code
16802
Alias/See Also
GLYH; A1CQ
CPT Codes
83036
Preferred Specimen
1 mL whole blood collected in an EDTA (lavender-top) tube
Minimum Volume
0.5 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 6 months
Refrigerated: 7 days
Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Sodium fluoride/oxalate (gray-top) tube • Heparinized plasma
Methodology
Enzymatic
Setup Schedule
Set up: Tues, Thurs, Sat; Report Available: 2-5 days
Reference Range
<5.7 % of total hemoglobin
Clinical Significance
To assist with control of blood glucose levels, the American Diabetes Association (ADA) has recommended glycated hemoglobin testing (HbA1c) twice a year for patients with stable glycemia, and quarterly for patients with poor glucose control. Interpretative ranges are based on ADA guidelines.
Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130