Hydroxyindoleacetic Acid

Last Modified: 7/10/2020 9:37:47 AM

Medical Necessity Documentation:  
Client Notes:  
Patient Preparation: Patient should avoid food high in indoles: avocado, banana, tomato, plum, walnut, pineapple, and eggplant. Patient should also avoid tobacco, tea, and coffee for 3 days before specimen collection.
Specimen Requirements: 10.0 mL aliquot from a well mixed 24 hour Urine Collection in a Plastic Container
Collection Instructions:

1. When starting the 24-hour period, urinate and discard (throw-away) this specimen. NOTE THE TIME
2. From that time on, collect all urine by urinating into a clean container and transfer into the provided container. 
3. Try to pass the last urine just prior to the end of the 24 hour period. Add this urine into the container. 
4. Urine Specimen should be kept refrigerated during and after collection. 

For patient collection instruction sheet see Addendum D
For Spanish patient collection instruction sheet see Addendum D
For Burmese patient collection instruction sheet see Addendum D
For Arabic patient collection instruction sheet see Addendum D

Minimum Volume: 5.0 mL
Transport & Storage: Temperature/Stability:

7 days Ambient
30 days Refrigerated
30 days Frozen

Reference Range: 2 years to 10 years: 8.0 mg/24 hr or less
> 10 years: 6.0 mg/24 hr or less
Critical Ranges:  
Test Comments:  
Methodology: HPLC
Clinical Significance:  
Custom Panel: No


Turn Around Time: 3 to 5 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: 5HIA1
EPIC Test Code: LAB352
Send Out Test Code: 2636 / 523X
Alternate Test Names: 5HIAA, 24-hour Urine; Serotonin, 24-hour Urine
Included Tests:  
CPT Coding: 83497

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