Hemoglobin A1c
0070426
Ordering Recommendation
Use to diagnose and monitor diabetes mellitus. Monitor prediabetes.
Mnemonic
HBA1C
Methodology
Quantitative High Performance Liquid Chromatography/Boronate Affinity
Performed
Sun-Sat
Reported
1-2 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
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: 24 hours; Refrigerated: 1 week; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Effective May 21, 2012
 
Available Separately Components Reference Interval
No Hemoglobin A1c 4.0-​5.6%
No Estimated Average Glucose By report
Interpretive Data
Hemoglobin A1c values of 5.7-6.4 percent indicate an increased risk for developing diabetes mellitus. Hemoglobin A1c values greater than or equal to 6.5 percent are diagnostic of diabetes mellitus. Diagnosis should be confirmed by repeating the Hb A1c test.

This boronate affinity Hb A1c method provides accurate analytical results in the presence of nearly all hemoglobin variants. Hb F higher than 10 percent of total Hb may yield falsely low results. Conditions that shorten red cell survival, such as the presence of unstable hemoglobins like Hb SS, Hb CC, and Hb SC, or other causes of hemolytic anemia may yield falsely low results. Iron deficiency anemia may yield falsely high results.  
Note
 
CPT Code(s)
83036
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