Glycohemoglobin

Included Tests

Estimated Average Glucose (eAG); Glycohemoglobin (HbA1C)

Test Notes

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 (test code FRUC; epic code LAB1013) is recommended.

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 

Test Comments:

Standards of Medical Care in Diabetes - 2010
Diabetes Care, 33 (Supp 1): S1-S61, 2010

Methodology:

• Turbidimetric Inhibition Immunoassay (TINIA)

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.

CDM

01425322

CPT Coding

83036

Medical Necessity May Apply

Medical Necessity Documentation

Duplicate testing on this test is not acceptable per Medicare: Testing to only be done every 90 days