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Test Name HA1C Hemoglobin A1c

Important Note

Medicare frequency limitations exist for this test in addition to diagnosis requirements. Click on link for list of medically necessary diagnoses: http://www.munsonhealthcare.org/medical-necessity. See Advance Beneficiary Notice of Noncoverage (ABN) form in Special Instructions.

Additional Codes

Atlas:

Test Code Test Name
A1CC HbA1c w/eAG

 

Specimen Requirements

Preparation of Patient: 

None

 

Container Type: 

3 mL EDTA lavender top tube

Specimen Type:

EDTA Whole Blood

 

Specimen Volume: 

3 mL of EDTA whole blood minimum 1 mL

 

Specimen Handling/Transport:

Do not aliquot.  Transport ambient room temperature

 

Specimen Stability/Storage:

3 days ambient room temperature

 

Performing Laboratory

Munson Medical Center Laboratories

Priority, Frequency, & Turnaround

Priority

Non-Emergent

 

Frequency

Monday through Friday, Sunday

 

Turnaround

0 - 2 Days

Methodology

Capillary Electrophoresis

Reporting

Reference Range

4.2-5.8%

 

Linearity Range

4.0% -16.5%

 

Critical Decision

None

 

Result Interpretation

For diabetic patients undergoing treatment, a value of <7.0% is the target value.

Clinical Significance

Hemoglobin glycation is a non-enzymatic reaction between the intra-erythrocyte glucose and the N-terminal amino-group of the hemoglobin ß chains. This reaction takes place during the entire life of the red blood cells. The rate of glycated hemoglobin formation is related to the glycemia insofar as the intra-erythrocyte glucose concentration does not depend on insulin but only on the glycemia. It accumulates in red blood cells during the 120 days of their life.

 

The level of glycated hemoglobin corresponds to the "integration" of all the glycemic variations during the previous weeks. It can be used:

- as an index of diabetes control. This quantification allows to evaluate the middle term efficiency of treatments,

- as an aid in the diagnosis of diabetes mellitus and as an aid in the identification of patients at risk for developing diabetes mellitus.

CPT Code(s)

83036

Special Instructions