Hemoglobin A1c

Abbrev Code:GLYHB   
Order Code:LAB90Order Name:Hemoglobin A1c
Synonyms:Glycohemoglobin; Glycated Hemoglobin; Glycosylated Hemoglobin
Methodology:Roche: Turbidmetric inhibition immunoassay (TINIA)
Vista: Turbidmetric and colorimetric
Architect: Enzymatic
CPT Codes: 83036 x1, 83036 x1
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Roche Go Live Schedule

Collection Instructions

Optimal Volume:2.5 mL
Minimum\Peds Volume:1.0 mL
Container:Purple (EDTA)
Causes for Rejection:Frozen specimens
Contraindications:Not useful more often than at 4-6 week intervals. Low hemoglobin may cause falsely decreased results.

Processing and Shipping

Specimen Processing:Do not centrifuge. Store in refrigerator.
Shipping Instructions:Ship refrigerated to arrive within 7 days of specimen collection.
Stability:Roche: 3 days at room temperature; 7 days refrigerated; 6 months frozen.
Vista: 8 hours at room temperature; 7 days refrigerated.
Test Performed at or Referral Lab Chemistry  (CSC Maple Grove, Roche-Lakes, Roche-Northland, Roche-Range, Roche-Ridges, Roche-Southdale, Roche-St. John's, Roche-UMMC East, Roche-UMMC West)


Reference Range:
Normal Less than 5.7%
Pre-Diabetes 5.7-6.4%
Diabetes 6.5% or greater
Use:Assess glycemic control in all people with diabetes mellitus. This method uses TTAB (Tetradecyltrimethylammonium bromite) as the detergent in the hemolyzIng reagent to eliminate interference from leukocytes (TTAB does not lyse leukocytes). Sample pretreatment to remove labile HbA1c is not necessary.

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