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Homocysteine, Total, Plasma or Serum
Test CodeHCYSP
Alias/See Also
Total Homocysteine
CPT Codes
83090
Preferred Specimen
Submit only 1 of the following specimens: Plasma
Draw blood in a green-top (lithium heparin) tube or a lavender-top (EDTA) tube. Specimen must be collected on ice. Spin specimen down within 1 hour of draw, promptly separate plasma from cells, and send 0.5 mL of plasma in plastic vial.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a plain, red-top tube. Spin specimen down within 1 hour of draw, promptly separate serum from cells, and send 0.5 mL of serum in plastic vial.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Draw blood in a green-top (lithium heparin) tube or a lavender-top (EDTA) tube. Specimen must be collected on ice. Spin specimen down within 1 hour of draw, promptly separate plasma from cells, and send 0.5 mL of plasma in plastic vial.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a plain, red-top tube. Spin specimen down within 1 hour of draw, promptly separate serum from cells, and send 0.5 mL of serum in plastic vial.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Transport Temperature
Refrigerate OK/Frozen OK
Methodology
Colorimetric
Setup Schedule
Monday, Wednesday, and Friday
Reference Range
Males: 5.8-15.5 µmol/L
Females: 3.8-13.1 µmol/L
Performed By
North Mississippi Medical Center Pathology Department
Performing Laboratory
NMMC Pathology Department
