Hemoglobin A1c
Also known as: HBA1C
Use
Used to diagnose and monitor diabetes mellitus. It also monitors prediabetes. HbA1c values indicating an increased risk for developing diabetes mellitus are between 5.7-6.4 percent, while values greater than or equal to 6.5 percent are diagnostic of diabetes mellitus. For diagnosis in individuals without unequivocal hyperglycemia, results should be confirmed by repeat testing.
Special Instructions
For patients with known hemoglobin variants without hemoglobin A, the preferred test for monitoring long-term glycemic control is Fructosamine (ARUP test code 0099012).
Limitations
This assay provides accurate results for hemoglobin A1c in the presence of hemoglobin variants when hemoglobin A is also present. In cases where hemoglobin A is absent, consider monitoring with Fructosamine instead.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 27353-2
- 4548-4
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
Not provided
Minimum Volume
1 mL
Container
Lavender (EDTA) or pink (K2EDTA).
Collection Instructions
Transport whole blood in original tube.
Storage Instructions
Refrigerated.
Causes for Rejection
Tissue or urine samples; Samples frozen after 8 hrs of collection and samples frozen at temperatures less than -70°C.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 hours |
| Refrigerated | 1 week |
| Frozen | 3 months |