Sign in →

Test Code A1C HEMOGLOBIN A1c with eAG

Important Note

Test subject to Medicare National Coverage Determination (NCD).

See Medical Necessity documentation requirements by clicking on  

Medicare National Coverage Determinations under General Information

to left of this screen.

Performing Laboratory

Porter Hospital Laboratory

Specimen Requirements

Specimen Type: Blood
Container/Tube: Lavender top, EDTA whole blood

Specimen Volume: Full tube, submit 2.5 mL serum
Specimen Minimum Volume: 1.0 mL
Collection Instructions:
1. Send specimen in original tube.
2. Samples are stable for:
• 3 days at room temperature
• 7 days at 2-8 °C

Specimen Transport Temperature


Days Performed

Days Set Up: Monday – Friday
Estimated Report Time: Same day

Test Classification and CPT Coding


Normal Reference Values

<5.7% Normal
5.7-6.4% Increased risk for diabetes
=>6.5% Diagnostic for diabetes (if confirmed)
The A1c goal for nonpregnant adults in general is <7%.
The A1c goal for selected patients may be significantly lower than 7% if this can be achieved without significant
hypoglycemia or other adverse effects of treatment.

Critical Values