Test Directory

5-Hydroxyindoleacetic Acid, 24 Hour, Urine

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Updated Test Information:

Test Description
5-Hydroxyindoleacetic Acid, 24 Hour, Urine
Synonym(s)
5-Hydroxyindoleacetic Acid
Test ID
HIAA
General Information
Useful for:
Biochemical diagnosis and monitoring of intestinal carcinoid syndrome
Specimen Type
Urine
Specimen Requirements
Urine, 24 hour collection
Specimen Collection / Processing Instructions
Urine, 24 hour collection - Supplies: Urine Tubes, 10 mL (T068) Container/Tube: Plastic, 10-mL urine tube Specimen Volume: 5 mL Collection Instructions: 1. Collect a 24-hour urine specimen. 2. Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children &
lt
5 years old. Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.
Stability
Refrigerated (preferred) 56 days
Frozen 365 days
Unacceptable Specimen Conditions
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Estimated TAT
2-4 days
Testing Schedule
Monday-Friday
CPT Code(s)
83497
Minimum Sample Volume
1 mL
Reference Range File View/Download File
Performing Lab
Mayo
LOINC Code(s)
1695-6, 13362-9, 3167-4