CPT Code:

82131

Test Includes:

Methionine.

Availability:

Monday - Friday, 0800 - 1700.

Turnaround Time:

2 - 4 days.

Minimum Volume:

0.3 mL (at least 0.5 mL preferred).

Specimen Handling:

Centrifuge and separate from cells within 1 hour of drawing.  Freeze serum or plasma.

Interpretive Reference Range:

Provided with patient report.  Age dependent.

Use:

Useful in diagnosis of cystathionine beta-synthase deficiency, deficiency of methionine activating
enzyme, or metabolic liver disease.

Methodology:

Ion exchange chromatography (amino acid analyzer).