Hemoglobin A1C

Orderable EAP code:

LAB00093

Billable EAP Codes:

80002031 x 1

CPT Codes:

83036 x 1

Lab Section:

Immunology

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:

2.0 mL blood in a LAVENDER top tube (EDTA). Specimen is stable for up to 7 days refrigerated (2 to 8 C).

Pediatric Specimen Requirements:

0.5 mL blood in a pediatric LAVENDER top tube (EDTA). Specimen is stable for up to 7 days refrigerated (2 to 8 C). 

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