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Test Code HA1C HEMOGLOBIN A1C

Important Note

Test subject to Medicare National Coverage Determination (NCD) 190.21 - Glycated Hemoglobin/Glycated Protein.

This test subject to reflex testing see laboratory policy. If Hemoglobin A1C shows a suspicious Hgb not previously identified a Hemoglobin/Thalassemia Evaluation will be performed (cpt: 83020/85660/83021). You have the option to decline reflex testing if you believe it is not medically necessary. If we are not able to assay using the UVM Medical Center Hemoglobin A1C test methodology due to the presence of an abnormal hemoglobin in the patient sample, the test will be credited with the following reason:  A1c unreportable.  Abnormal hemoglobin present.  Measurement of serum fructosamine may be helpful to monitor glycemic control.

Additional Codes

Primary ID

SQ Code

PRISM Code

MayoAccess ID

HA1C

HA1C LAB90 FAH5419

 

Specimen Information

Container

Specimen

Temperature

Collect Vol

Submit Vol

Minimum Vol

Stability
Lavender Top Tube Whole Blood

Refrigerate

2 mL 2 mL 0.5 mL 7 days
*Lavender Microtainer Whole Blood Refrigerate 0.5 mL 0.5 mL 0.5 mL 7 days

*While a microtainer is an optional tube type in rare circumstances, it is not recommended.

Test Schedule / Analytical Time / Test Priority

Monday – Friday / 1 day / Not available STAT

Method

High Performance Liquid Chromatography (HPLC)

CPT(s)

Description CPT Code
Hemoglobin A1C                                         83036

 

Instrumentation

Tosoh G8

LOINC Code Information

Result Code Reporting Name LOINC Code
A1C Hemoglobin A1C 4548-4
EAG Est Avg Glucose 27353-2

 

Section

Chemistry-2

Performing Location

University of Vermont Medical Center

Reference Range

The following A1c interpretive data reflect the 2017 American Diabetes Association (ADA) guidelines and will be reported with each A1c result:

 

<5.7%  Normal

5.7 - 6.4% Prediabetes

=>6.5% Diagnostic for diabetes (if confirmed)

 

Goals for glycemic control in diabetes (ADA 2017)

<7% - The A1c target for nonpregnant adults with diabetes.

             More or less stringent targets may be appropriate for individual patients.
<7.5% - The A1c  target for children and adolescents with type 1 diabetes.

 

References:

 

1.       American Diabetes Association.  “Classification and Diagnosis of Diabetes.”   Diabetes Care 2017 Jan; 40 (Supplement 1):  511-524

2.       American Diabetes Association.  “Glycemic Targets.”  Diabetes Care 2017 Jan; 40 (Supplement 1):  548-556

3.       American Diabetes Association.  “Children and Adolescents.”  Diabetes Care 2017 Jan; 40 (Supplement 1):  105-113

Is the UVMMC lab NY State Certified to perform this testing?  Yes/No

Yes