Hemoglobin A1C
Orderable EAP code:
Billable EAP Codes:
CPT Codes:
Lab Section:
Turnaround Time:
Routine: 1 to 3 days
Test Schedule:
Monday through Friday.
Units:
Interpretation:
Less than 5.7%: Normal
5.7 to 6.4%: Consistent with pre-diabetes
Greater than 6.4%: Consistent with diabetes
Specimen Requirements:
2 mL blood in a LAVENDER top (EDTA) tube.
Stable for 24 hours at room temperature or for 7 days refrigerated (2 to 8 degrees Celsius).
Pediatric Specimen Requirements:
0.5 mL blood in a pediatric LAVENDER top (EDTA) tube. Stable for 24 hours at room temperature or for 7 days refrigerated (2 to 8 degrees Celsius).
Reference Range:
5.6% or less.
Comments:
Monitors and/or diagnoses diabetes mellitus. Monitors prediabetes. Diagnosis should be confirmed by repeating the Hb A1c test.
Alternate forms of testing such as fructosamine should be considered for monitoring long term glycemic control in patients with: Increased red cell turnover, certain hemoglobinopathies (e.g., HbS, HbE, HbC and thalassemia syndromes), anemias, blood loss, chronic liver disease and hemochromatosis (artefactually low HbA1c); iron deficiency anemia (artefactually high HbA1c due to enhanced glycation of hemoglobin).
Synonyms:
Glycated Hemoglobin
Glycosylated Hemoglobin
HA1C
HBA1C