Alert

Hemoglobin A1C

Tube Type

Test ID   LAB90
EPIC Order
  HGB A1C; HEMOGLOBIN A1C
CPT Code(s)   83036
Group/Individual Test   Group
Laboratory   Core Laboratory
Tube Station   30
Specimen Routine: 3 mL blood/lavender top tube
   Micro: 500 uL blood/lavender top bullet (minimum volume-allows for no repeats)
Stability
Whole blood
Room temperature: 3 days
Refrigerator: 3 days
Frozen: NO
Availability Routine: 24 hrs/day
Turnaround Time   Routine: 6 hours; STAT: 1 hour
Reference Range Normal: 4.8-5.6%
 
Screening or Diagnosis of Diabetes Mellitus*
HA1c Reference Interval Interpretation
4.8-5.6 Normal
5.7-6.4 Dysglycemia
>6.4 Diabetes Mellitus
*Not recommended for diagnosis of diabetes in children with Cystic Fibrosis or with symptoms suggestive of acute onset type 1 diabetes.
   
HA1c Glycemic Goals** Age Group
<7.5 % <18 years
<7% >/= 18 years
**Goals should be individualized; more or less stringent A1c glycemic goals may be appropriate for individual patients.
     (Adopted from: 2018 ADA Standards of Medical Care in Diabetes)
Comment

Includes calculation of Estimated Average Glucose(eAG) using the equation: eAG mg/dL = [28.7 X HbA1C]-46.7.  There is no reference range associated with the calculation.  The calculation cannot be performed when the HbA1C concentration is outside the analytical measuring range.  There is no charge for the calculation.

Reference range effective April 30, 2018

Reviewed by jcayless on December 19, 2017

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514

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