Hemoglobin A1C
| Label Mnemonic: | A1C |
| Epic code: | LAB90 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 83036 |
Specimen(s):
Whole Blood
Collection Medium:
|
| Lavender top tube 3 mL (EDTA) |
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection
containers.
Minimum:
3 mL; lavender top or TWO full lavender Microtainer®
devices for pediatrics
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
<5.7%
Hemoglobin A1c values of 5.7-6.4% indicate an increased risk for developing diabetes mellitus and are considered prediabetes. The healthcare team should counsel patients accordingly. In patients with diabetes, HbA1c goals should be discussed with the healthcare team.
Hemoglobin A1c values of 6.5% or greater are diagnostic of diabetes mellitus. In patients with diabetes, HbA1c goals should be discussed with the healthcare team.
Interpretive information based on Diagnosis and Classification of Diabetes Mellitus, American Diabetes Association (1).
Hemoglobin A1c values of 5.7-6.4% indicate an increased risk for developing diabetes mellitus and are considered prediabetes. The healthcare team should counsel patients accordingly. In patients with diabetes, HbA1c goals should be discussed with the healthcare team.
Hemoglobin A1c values of 6.5% or greater are diagnostic of diabetes mellitus. In patients with diabetes, HbA1c goals should be discussed with the healthcare team.
Interpretive information based on Diagnosis and Classification of Diabetes Mellitus, American Diabetes Association (1).
Comments:
Refer to BD Microtainer® Tubes
product sheet
for detailed sample collection instructions.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Test Limitations:
Rheumatoid factor less than 750 IU/mL and ascorbic acid less than
50 mg/dL do not interfere.
In hemolytic anemia and iron deficiency anemia, the average age of
erythrocytes is altered. Caution should be used when interpreting the
HbA1c results from patients with these conditions (2).
References:
(1) American Diabetes Association, Classification and Diagnosis of
Diabetes: Standards of Medical Care in Diabetes. Diabetes Care.
2018; Jan;41:S1
(2) National Academy of Clinical Biochemistry. Hb A1c. In: Sacks DB,
ed. Guidelines and Recommendations for Laboratory Analysis in
the Diagnosis and Management of Diabetes Mellitus [Online]; 2011;
Chap 9.
Methodology:
Turbidimetric Immuno inhibition
Sample Processing:
Lavender tube is sent as whole blood, no processing necessary.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Sample Storage:
Refrigerate.
Transport Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal
bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.