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Lab Dept:
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Chemistry
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Test Name:
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Hemoglobin A1c
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General Information
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Lab Order Codes:
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HA1C
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Synonyms:
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Glycated Hemoglobin, Glyco-Hgb; Hgb A1c
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CPT Codes:
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83036 – Hemoglobin; glycated
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Test Includes:
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Hemoglobin A1c concentration reported as a % of total hemoglobin.
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Logistics
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Test Indications:
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The measurement of hemoglobin A1c concentration is recommended for monitoring the long-term care of diabetes. The level of Hgb A1c is proportional to the level of glucose in the blood over a period of approximately 2 months.
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Lab Testing Sections:
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Chemistry
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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1 – 3 days, test performed Monday – Friday.
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Lavender top (EDTA) tube or Clinitube™ (D956G-70-35) heparinized glass capillary tube
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Draw Volume:
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0.5 mL blood in EDTA tube or 0.035 mL blood in capillary tube
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Processed Volume:
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0.001 mL blood
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Collection:
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Routine venipuncture preferred
Alternate sample: capillary puncture
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Special Processing:
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Lab Staff: Do not centrifuge. Specimen should remain in original collection tube. Store at refrigerated temperatures.
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Patient Preparation:
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None
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Sample Rejection:
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Clotted specimen, unlabeled specimen, total Hgb <7 or >24 g/dL
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Interpretive
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Reference Range:
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4.2 – 6.3%
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Critical Values:
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N/A
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Limitations:
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The patient’s total hemoglobin must be within the range of 7-24 g/dL for testing by this method.
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Methodology:
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Monoclonal Antibody
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Contraindications:
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Patients with >10% Hgb F will have lower than expected Hgb A1c results.
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References:
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Bayer DCA 2000 Hgb A1c Insert 5000GD Rev. 10/00
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