Hydroxyindoleacetic Acid, 5- (5-HIAA), Urine (Includes Creatinine)

TEST: 500720
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CPT: 82570; 83497
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Expected Turnaround Time

2 - 16 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Urine (24-hour, well-mixed)

Volume

50 mL aliquot. Acidify urine to pH 4.0 with acetic acid. Do not use strong mineral acid!

Minimum Volume

5 mL aliquot (Note: This volume does not allow for repeat testing.)

Container

Urine container, 24-hour

Collection

Acidify urine to pH 4.0 with acetic acid. Do not use strong mineral acid! Indicate 24-hour volume.

Storage Instructions

Ship frozen on dry ice.

Test Details

Methodology

High-pressure liquid chromatography/tandem mass spectrometry (HPLC/MS-MS), Jaffe reaction, colorimetric