Hemoglobin A1c

CPT Code


Specimen Type


Container Type



Room Temperature, 8 hours; 2-8°C, 7 days

Handling Instructions

Invert 8-10 times immediately after collecting

Clinical Notes

The hemoglobin A1c test measures the percentage of hemoglobin A in your blood that has glucose attached. The more glucose there is in the blood, the more of it will be bound to hemoglobin. Since red blood cells live about three months, your hemoglobin A1c test result corresponds to your average blood glucose level throughout the three months before your test.

Performing Lab

Principle Laboratory - Dallas
6210 N Belt Line Rd
Irving, TX 75063

Principle Laboratory - Houston
16840 Buccaneer Ln
Suite 281
Houston, TX 77058