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Test Code Billings Clinic: 4326 Hemoglobin A1c, Blood

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

  • Evaluating the long-term control of blood glucose concentrations in diabetic patients
  • Diagnosing diabetes
  • Identifying patients at increased risk for diabetes (prediabetes)

 

Methodology

High-Performance Liquid Chromatography (HPLC)

Specimen Requirements

  • Draw blood in a lavender-top (EDTA) tube(s).
  • Send 1 mL of unprocessed EDTA whole blood refrigerated.
  • Do not centrifuge.
  • Forward unprocessed whole blood promptly.

Storage/Stability

Specimen Type Temperature Time
EDTA Whole Blood Refrigerated 14 days
  Ambient 24 hours

Reference Values

4.0 - 6.0 %

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

83036 - Hemoglobin; glycosylated (A1C)


LCD or NCD test: ICD-10 code is required for this test. When appropriate, obtain a properly executed ABN and submit the ABN with test order(s). See “Medical Necessity and Advanced Beneficiary Notice (ABN) Policy and Form” under "Resources” for a copy of a form and additional information.

LOINC Code Information

Reporting Name LOINC Code
Hemoglobin A1C 17856-6