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Labcorp Oklahoma, Inc.
Test Directory


Index:

Homocysteine

Order Name HOMOCYS
Test Number: 2004575
Revision Date 05/28/2021
Test Name Methodology LOINC Code
Homocysteine
Chemiluminescence Assay 26582-7 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2 mL (1.0) Plasma Lithium Heparin PST (Light Green Top) Refrigerated or Frozen
Alternate 1 2 mL (1.0) Serum Clot Activator SST Refrigerated or Frozen
Alternate 2 2 mL (1.0) Plasma EDTA (Lavender Top) Frozen
Instructions Place specimen on ice immediately after drawing and keep on ice until centrifugation.
Plasma or serum should be separated from cells ASAP.
Once separated from cells Stability: Ambient 6 hours. Refrigerated 14 days. Frozen 1 year.
GENERAL INFORMATION
Testing Schedule Mon-Fri 
Expected TAT 1-3 days  
Clinical Use HCY represents the main biochemical marker of several primary and secondary disorders of methionine metabolism. HCY has been linked as an independent predictor of cardiovascular disease. 
CPT Code(s) 83090
Lab Section Chemistry