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Test Code LAB90 Hemoglobin A1C

Additional Codes


Reporting Title

Hemoglobin A1C

Estimated Average glucose (eAG)


Roche Turbidimetric Inhibition Immunoassay  RMH, GMC, and DH

Siemens Diagnostics  HMH, OBL and MGH

Useful in monitoring therapeutic goals for glycemic control.

Performing Laboratory

OhioHealth Laboratory Services-RMH, GMC, DH, DMH, HMH, MGH, OBL Core Laboratories

Specimen Requirements

Draw blood in a lavender-top (EDTA) tube(s) and send EDTA whole blood.  Mix by gently inverting 8 times. Forward unprocessed whole blood   

Specimen Stability Information

Specimen Type Temperature Time
Whole Blood Refrigerated 7 days
  Ambient  3 days
  Frozen  6 months


Day(s) Test Set Up

Monday through Sunday; Continuously

Reference Values

Hemoglobin A1C      4.2-6.0%   RMH, GMC, DH, DMH

                                 4.0-6.0%  HMH, OBL AND MGH



Estimated Average Mean Glucose (eAG)   68-126 mg/dL

Test Classification and CPT Coding