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Hemoglobin A1c
0070426
Ordering Recommendation

Use to diagnose and monitor diabetes mellitus. Monitor prediabetes.

Mnemonic
HBA1C
Methodology
Quantitative Capillary Electrophoresis
Performed
Sun-Sat
Reported
1-2 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Lavender (EDTA) or Pink (K2EDTA). 
Specimen Preparation
Transport 5 mL whole blood in original tube. (Min: 1 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Tissue or urine. 
Remarks
 
Stability
Ambient: 72 hours; Refrigerated: 1 week; Frozen: 3 months (avoid repeated freeze/thaw cycles) 
Reference Interval
Effective May 21, 2018
Available Separately
Components
Reference Interval
NoHemoglobin A1cLess than 5.7 percent
NoEstimated Average GlucoseBy report

Interpretive Data
HbA1c values of 5.7-6.4 percent indicate an increased risk for developing diabetes mellitus. HbA1c values greater than or equal to 6.5 percent are diagnostic of diabetes mellitus. For diagnosis of diabetes in individuals without unequivocal hyperglycemia, results should be confirmed by repeat testing.

Note
This assay provides accurate results for hemoglobin A1c in the presence of hemoglobin variants when hemoglobin A is also present. In patients with known hemoglobin variants without hemoglobin A, suggest monitoring long term glycemic control with Fructosamine (ARUP test code: 0099012).
Hotline History
N/A
Components
Component Test Code*Component Chart NameLOINC
0070427Estimated Average Glucose27353-2
0070428Hemoglobin A1C4548-4
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Aliases
  • A1C
  • A1c Hemoglobin
  • Glycated Hemoglobin
  • Glyco HGB
  • Glyco-Hb
  • Glycosylated Hemoglobin
  • HA1C
  • HbA1c
  • Hemoglobin A1C
  • Hemoglobin A1c, Blood
  • HgbA1c