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GLYCOSYLATED HEMOGLOBIN

Test Code
GHYB


CPT Codes
83036

Includes
Glycosylated Hemoglobin A1c, calculated glucose for A1c


Preferred Specimen
LAVENDER TOP TUBE


Specimen Stability
24 hours room temp, 14 days refridgerated


Limitations
In patients with hemolytic anemia, decreased values may occur.  Fetal hemoglobin >15% interferes with this method.


Clinical Significance
Glycohemoglobin is a term for hemoglobin-glucose complexes formed when glucose binds to the alpha and beta chains of hemoglobin.  The most prevalent complex is Hemoglobin A1c where hemglobin is bound to the N-terminal of the beta chain.  Hemoglobin A1c does not fluctuate significantly with different plasma glucose levels making it a good indication of blood glucose levels over the life of the red blood cell, 2-3 months.




The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.