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Hemoglobin A1c
Ordering Recommendation
Use to diagnose and monitor diabetes mellitus. Monitor prediabetes. For patients with known hemoglobin variants without hemoglobin A, the preferred test for monitoring long-term glycemic control is Fructosamine (0099012).
New York DOH Approval Status
Specimen Required
Lavender (EDTA) or pink (K2EDTA).
Transport whole blood in original tube. (Min: 1 mL)
Refrigerated.
Tissue or urine.
Samples frozen after 8 hrs of collection and samples frozen at temperatures less than -70C.
Ambient: 72 hours; Refrigerated: 1 week; Frozen: 3 months (Must be frozen within 8 hrs of collection at -70 to -80C)
Methodology
Quantitative Capillary Electrophoresis
Performed
Sun-Sat
Reported
1-2 days
Reference Interval
Effective May 21, 2018
| Available Separately |
Components |
Reference Interval |
|---|---|---|
| No | Hemoglobin A1c | Less than 5.7 percent |
| No | Estimated Average Glucose | By 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.
FDA
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
CPT Codes
83036
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0070427 | Estimated Average Glucose | 27353-2 |
| 0070428 | Hemoglobin A1C | 4548-4 |
Aliases
- A1C
- A1c Hemoglobin
- Glycated Hemoglobin
- Glyco HGB
- Glyco-Hb
- Glycosylated Hemoglobin
- HA1C
- HbA1c
- Hemoglobin A1C
- Hemoglobin A1c, Blood
- HgbA1c
