Glycohemoglobin

Last Modified: 11/30/2023 8:09:04 AM


  Medicare Medical Necessity Restrictions May Apply
Medical Necessity Documentation:

Duplicate testing on this test is not acceptable per Medicare:  Testing to only be done every 90 days
Client Notes:  
Patient Preparation:  
Specimen Requirements:

3.0 mL Whole Blood in a Lavender Top Tube - EDTA
Collection Instructions:  
Minimum Volume: 1.0 mL Whole Blood
Transport & Storage: Temperature/Stability:

3 days Ambient
7 days Refrigerated

Do Not Freeze
Reference Range:

4.0 - 5.7% 

Interpretation
Non-Diabetic:   <5.7 
Increased risk of diabetes:   5.7 - 6.4   
Consistent with diabetes:   >or= 6.5 
Critical Ranges:  
Test Comments:

Glycohemoglobin interpretation may be compromised in conditions with abnormal red blood cell turnover and certain hemoglobin variants.  In these cases, use of a fructosamine assay (Lab Test Code FRUC; EPIC Test Code LAB1013) is recommended.


Standards of Medical Care in Diabetes - 2010
Diabetes Care, 33 (Supp 1): S1-S61, 2010
Methodology: Turbidimetric Inhibition Immunoassay (TINIA)
Clinical Significance:  
Documentation: The American Diabetes Association has recommended that laboratories report the eAG result as an adjunct to the A1c.
While the A1c result represents the average glucose over time, the eAG will be reported in the same units as daily self-monitoring glucose devices and may assist the patient’s ability to interpret the A1c.
For patients that may see an average glucose on their glucose meters, the eAG value may likely not match.  People with diabetes are more likely to test more often when their glucose levels are low, while the eAG represents glucose levels continuously throughout the day including after meals when people are less likely to test.  The eAG may help patients more directly see the difference between their individual meter readings and how they are doing with their glucose management overall.
Custom Panel: No

PRODUCTION SCHEDULE

Days Performed: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed: Parkview Regional Medical Center
PHL Test Code: GLYC1
EPIC Test Code: LAB90
Alternate Test Names: A1C; Glyco; Glycohemoglobin (HbA1C); Glycosylated Hemoglobin; HbA1C; Hemoglobin A1C; Hemoglobin with MPG
Included Tests: Estimated Average Glucose (eAG); Glycohemoglobin (HbA1C)
CPT Coding: 83036

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