Hemoglobin A1C
Label Mnemonic: A1C
Epic code: LAB90
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
6240 RCP
Whole Blood
Collection Medium:
Lavender top tube 3 mL (EDTA)
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
3 mL; lavender top or TWO full lavender Microtainer® devices for pediatrics
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
4.8 - 6.0%
Glycemic control guidelines:
  Non-diabetic <6%
  Goal <7%
  Therapeutic action >8%
Refer to BD Microtainer® Tubes product sheet for detailed sample collection instructions.

This test is also performed in the Iowa River Landing (IRL) clinical laboratory (for specimens drawn at that site).
Test Limitations:
Rheumatoid factor less than 750 IU/mL and ascorbic acid less than 
50 mg/dL do not interfere.

In hemolytic anemia and iron deficiency anemia, the average age of 
erythrocytes is altered. Caution should be used when interpreting the 
HbA1c results from patients with these conditions (2, 3).

This assay is not useful in judging day-to-day glucose control and 
should not be used to replace daily home testing of urine and blood 

(1) Glick MR, Ryder KW, Jackson SA. Graphical Comparisons of
    Interferences in Clinical Chemistry Instrumentation. Clin Chem

(2) Greiling H, Gressner AM, eds. Lehrbuch der Klinischen Chemie und
    Pathobiochemie, 3rd ed. Stuttgart/New York: Schattauer, 1995:279.

(3) Bessis M. Living Blood Cells and their Ultrastructure.  Berlin:
    Springer-Verlag; 1973.
Turbidimetric Immuno inhibition
CPT Code: