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Test Code GLYCO HEMOGLOBIN A1C, BLOOD

Additional Codes

Software Test Code
Label Text                                               GLYCO                                                                   
EPIC LAB90

Performing Laboratory

NorDx Laboratories

Useful For

Monitoring long term blood glucose control in individuals with diabetes mellitus

The test is not intended for judging day-to-day glucose control and should not be used to replace daily home testing of urine or blood glucose.

Method Name

Turbidimetric Immunoassay

Reference Values

4.2-5.6%

 

< 18 years: Hemoglobin A1c criteria for diagnosing diabetes have not been established for patients who are < 18 years of age.

≥ 18 years: Increased risk for diabetes (prediabetes): 5.7 - 6.4%

 

Diabetes: ≥ 6.5%

 

Falsely low percent A1C may be seen with abnomal hemoglobin variants or shortened erythrocyte survival (such as hemolysis,blood loss and pregnancy).

Days and Times Test Performed

Monday through Friday, exclusive of some holidays

Report Available

Up to 4 days

Profile Information

Individual Test Description
AVERAGE PLASMA GLUCOSE
HEMOGLOBIN A1C

Specimen Type

Whole Blood

Preferred Container

Lavender Top Tube (EDTA)

Preferred Volume

Whole Blood: 3 mL (Lavender Top Tube (EDTA))

Minimum Volume

Whole Blood: 1.5 mL (Lavender Top Tube (EDTA))

Specimen Collection and Handling

Send whole blood refrigerated.

Specimen Stability Information

Specimen Type: Whole Blood

Frozen: 3 Months

Refrigerated: 7 Days

Add On Capable

Yes

Advance Beneficiary Notice Requirements

This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policies. Please verify that the diagnosis code (ICD code) you have chosen demonstrates medical necessity for the test as documented in the physician’s patient record. The CMS web site is available to assist you with this verification. A properly executed Advance Beneficiary Notice (ABN) must be submitted with the specimen if medical necessity is not demonstrated by the ICD code chosen.

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer
83036 Hemoglobin, Glycosylated (A1C), Quantitative  

Keywords

A1C HEMOGLOBIN

GLYCATED HEMOGLOBIN

GLYCO-HEMOGLOBIN

GLYCOSYLATED HEMOGLOBIN

HB A1C

HGB (HEMOGLOBIN) ELECTROPHORESIS

Performing Laboratory Location

NorDx Laboratories

Clinical Significance

1. For diagnostic purposes, % HbA1c values (DCCT/NGSP) should be used in conjunction with information from other diagnostic procedures and clinical evaluations.

2. The test is designed only for accurate and precise measurement of % HbA1c (DCCT/NGSP). The individual results for total Hb and HbA1c concentration should not be reported.

3. The test is not intended for judging day-to-day glucose control and should not be used to replace daily home testing of urine or blood glucose.

4. As a matter of principle, care must be taken when interpreting any HbA1c result from patients with Hb variants. Abnormal hemoglobins might affect the half life of the red cells or the in vivo glycation rates. In these cases even analytically correct results do not reflect the same level of glycemic control that would be expected in patients with normal hemoglobin.

5. Any cause of shortened erythrocyte survival will reduce exposure of erythrocytes to glucose with a consequent decrease in % HbA1c values (DCCT/NGSP), even though the time-averaged blood glucose level may be elevated. Causes of shortened erythrocyte lifetime might be hemolytic anemia or other hemolytic diseases, homozygous sickle cell trait, pregnancy, recent significant or chronic blood loss, etc. Caution should be used when interpreting the HbA1c results from patients with these conditions.

6. Glycated HbF is not detected by the assay as it does not contain the glycated -chain that characterizes HbA1c. However, HbF is measured in the Total Hb assay and as a consequence, specimens containing high amounts of HbF (> 10 %) may result in lower than expected % HbA1c values (DCCT/NGSP).

LOINC Code Information

4548-4