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Test Code 0751 Hemoglobin A1C, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Turbidimetric Inhibition Immunoassay (TINIA)
The final percent HbA1c result has been standardized to the results obtained in the Diabetes Control and Complications Trial (DCCT).

General Information:
This test is used for monitoring diabetic patients. Do not confuse with the hemoglobin A1 fraction which is a part of test #3208 Hemoglobin Analysis, Blood.

Specimen Requirements

Specimen Type: Whole blood
Container/Tube: Lavender top (EDTA)
Specimen Volume: Full tube
Collection Instructions: Do not overfill tube.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: not available

Routine: 2 to 4 hours after receipt in laboratory

Reference Values




Not established

Note: The American Diabetes Association (ADA) recommends reporting an estimated average glucose (eAG) with all hemoglobin A1c results using the equation derived from a study of 507 normal and diabetic adults. Minority populations were under-represented and children were not included. The eAG is not equivalent to a fasting glucose.
Literature References:

1. American Diabetes Association.  Standards of Medical Care in Diabetes.  Diabetes Care: 2016; 39, S1: S13 & S39. 

2. Burtis CA, Ashwood ER, Bruns DE eds: Textbook of Clinical Chemistry and Molecular Diagnostics 5th ed: Chapter 46, p. 1415, Elsevier, St. Louis, MO, 2012.

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only
Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000.

Specimen Transport Temperature


Special Instructions

LOINC Code Information

Name LOINC Code
Hemoglobin A1C, Blood 4548-4
Estimated Average Glucose 27353-2