Hemoglobin A1C (HbA1c)
Hemoglobin A1c: 83036
Hemoglobin A1c with Reflex to Glycomark: If Hemoglobin A1c is >5.9% and <8.1%, then GlycoMark will be performed at an additional charge (CPT 84378).
Hemoglobin A1c: C145
Hemoglobin A1c with Reflex to GlycoMark: C522
Includes: HbA1c and Estimated Average Glucose
ABN Requirement: No
Synonyms: Hemoglobin A1c; HbA1c; HgbA1c; Glycohemoglobin; Glycated Hemoglobin; Glycosylated Hemoglobin
Hemoglobin A1c: EDTA whole blood
Hemoglobin A1c with Reflex to GlycoMark: EDTA whole blood and serum
Volume: 4.0 mL
Minimum Volume: 2.0 mL
Hemoglobin A1c: EDTA (Lavender Top tube)
Hemoglobin A1c with Reflex to GlycoMark: EDTA (Lavender Top tube) and Gel-barrier Tube (SST)
- Collect and label sample according to standard protocols.
- Gently invert tube 8-10 times immediately after draw. DO NOT SHAKE.
- Do not centrifuge.
Transport: Store EDTA whole blood at 2°C to 8°C after collection and ship the same day per packaging instructions included with the provided shipping box.
Ambient (15-25°C): 3 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 6 months
Causes for Rejection: Specimens other than EDTA whole blood; improper labeling; samples not stored properly; samples older than stability limits
Methodology: Turbidimetric Inhibition Immunoassay (TINA)
Turn Around Time: 1 to 3 days
eAG (Estimated Average Glucose):
HbA1c Reflex Value for GlycoMark:
For additional information on the GlycoMark test, please see www.clevelandheartlab.com/tests/glycomark/
Clinical Significance: HbA1c testing is used to monitor the glucose control of diabetics to minimize complications of chronically elevated glucose levels. It is also used for the diagnosis of diabetes and pre-diabetes in individuals with or without symptoms of hyperglycemia.
Limitations: The A1c test should not be used for the diagnosis of diabetes in pregnant women, individuals who have experienced recent severe bleeding or who have received blood transfusions, individuals with chronic liver or kidney disease or individuals with certain blood disorders.
The CPT codes provided 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 payer being billed.