A1C Estimated Average Glucose GLYC

Synonyms

Glycosylated Hemoglobin
A1c
Hgb A1c
GLYC
Glycated Hemoglobin
HA1C

Allscripts (AEHR) Order Name

A1CG - A1C with Estimated Average Glucose

Sunrise Clinical Manager (SCM) Order Name

A1C with Estimated Average Glucose

Clinical Info

Use to diagnose and monitor diabetes mellitus and/or prediabetes.
This assay may produce lower HbA1c results in patients with abnormal amounts of HbF. 
Consider ordering Fructosamine as an alternative test for monitoring long-term glycemic control in these patients.

Specimen Type

Blood

Container

Lavender Top Tube

Collection Instructions

Container/Tube: Lavender top tube
Specimen: 3 mL EDTA whole blood
Transport Temperature: Refrigerated

Transport Instructions

Refrigerated

Specimen Stability

3 days at 15‑25 °C
7 days at 2‑8 °C
6 months at −15 to −25 °C

Methodology

Days Performed

Monday through Sunday

Performing Laboratory

Northwell Health Laboratories

CPT

83036

PDM

5302212

Result Interpretation

Reference Range: 4.0-5.6%
High Risk (prediabetic): 5.7 - 6.4%
Diabetic, diagnostic:  ≥6.5%
 
ADA diabetic treatment goal: <7.0%
The Hemoglobin A1c reference ranges are based on the 2010 recommendations of the American Diabetes Association. Interpretation may vary for children and adolescents.
 

The American Diabetes Association (ADA) and the American Association for

Clinical Chemistry (AACC) have determined that the correlation between the

measured HbA1c and calculated eAG is strong enough to recommend reporting

both results when a HbA1c is ordered(1). The eAG or mean plasma glucose (MPG)

reflects the average glucose over the same time span as the HgbA1c, approximately

3 months. The eAG is a calculated result.
 
Estimated Average Glucose (eAG) Calculation: (28.7) xA1G)- 46.7 = Glucose mg/dL
 Reference range: 68 - 114

(1). American Diabetes Association Standards of Medical Care in Diabetes – 2018. Journal of Clinical & Applied Research and Education. 2018;41:557 – 558. 

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