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Test Code 13C Hemoglobin A1C

Additional Codes

ALAB: A1C

PowerChart: Glycohemoglobin (HGB A1C) Panel

MA Cerner: Hemoglobin A1C

Specimen Requirement

MercyOne DBQ: 3 mL whole blood is required.

MA: 3 mL whole blood is required

Pediatric: 0.3 mL whole blood is required

Additional Specimen Collection Information

MercyOne DBQ:

Collect blood in a EDTA, purple-top whole blood is preferred. Lithium heparin green-top whole blood is also acceptable.

MA:

Adult: Collect blood in a EDTA, purple-top whole blood.

 

Useful For

Diagnosing diabetes

Evaluating the long-term control of blood glucose concentrations in diabetic patients

 

Performance

MercyOne DBQ: Typically completed within 4 hours after the specimen arrives at the testing site.

MA: Typically completed as requested.

CPT Code Information

83036 Chemistry: Hemoglobin fractionation and qunatitation; glycosylated (A1C)

NCD Frequency Limitations: It is not reasonable and necessary to perform glycated hemoglobin tests more often than every three months on a controlled diabetic patient to determine if the patient's metabolic control has been on average within the target range.

LOINC Code Information

17855-8 Hemoglobin A1c/Hemoglobin.Total In Blood

Test Method

MercyOne DBQ: Timed Endpoint; Beckman DXC880i

MA East and West: Turbidimetric inhibition immunoassay (TINIA); Roche Cobas 6000

Reference Values

Nondiabetic: <5.7%

Prediabetes 5.7 - 6.4%

Diabetes: ≥ 6.5%

The American Diabetes Association recommends that HbA1C results be reported along with a calculated Estimated Average Glucose (EAG). The new number is derived from the HbA1C result and is based on a standardized formula developed from the A1C-Derived Average Glucose study (ADAG) which confirmed and defined a linear relationship between estimated average daily glucose and HbA1C. It is intended to help healthcare providers communicate HbA1C results to patients using the same units of measure (mg/dL) that patients are familiar with from their routine whole blood glucose measurements.
 EAG(mg/dL) = 28.7 x HbA1C - 46.7