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HelpTest Code 13C Hemoglobin A1C
Additional Codes
ALAB: A1C
PowerChart: Glycohemoglobin (HGB A1C) Panel
MA Cerner: Hemoglobin A1C
Test Method
MercyOne DBQ: Timed Endpoint; Beckman DxC700AU
MA East and West: Turbidimetric inhibition immunoassay (TINIA); Roche Cobas 6000
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.
Performance
MercyOne DBQ: Typically completed within 4 hours after the specimen arrives at the testing site.
MA: Typically completed as requested.
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
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.
Useful For
Diagnosing diabetes
Evaluating the long-term control of blood glucose concentrations in diabetic patients
LOINC Code Information
17855-8 Hemoglobin A1c/Hemoglobin.Total In Blood