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Labcorp Oklahoma, Inc.
Test Directory


Serotonin 5-HIAA, 24-Hour ( 5-Hydroxyindoleacetic Acid )

Order Name SEROTON U
Test Number: 3808450
Revision Date 03/17/2023
Test Name Methodology LOINC Code
Serotonin 5-HIAA, 24-Hour ( 5-Hydroxyindoleacetic Acid )
High Performance Liquid Chromatography  
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 4 mL (1 mL) Urine, 24-hour 24 hour Urine Container Room Temperature
Instructions This is not for Random Urine Collections
Notes: 1 mL aliquot (Note: This volume Does NOT allow for repeat testing).
Specimen Type: Plastic urine container, no preservative (NOTE: 1 g/L boric acid may be added as a preservative for other tests without harm to 5-HIAA.)
Container Detail: No preserv
Specimen Storage: Room Temperature
Specimen Collection: Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Label container with patient's name, date, and time. Measure and record total urine volume. Mix well; send aliquot.
Special Instructions: Measure and record total 24-hour urine volume on the request form.
Specimen Stability: Ambient: 7 days, Refrigerated : 14 days, Frozen: 14 days
Expected TAT 4 - 8 days  
Notes Labcorp Test Code: 004069
CPT Code(s) 83497
Lab Section Reference Lab