Skip to main content
Oxford University Hospitals NHS Foundation Trust
Clinical Biochemistry

Coronavirus / COVID-19

If you have a new continuous cough and/or high temperaturedo not come to our hospitalsFollow the national advice and stay at home for seven days

Important information about our services and restrictions on visiting our hospitals can be found in the COVID-19 section.

This site is best viewed with a modern browser. You appear to be using an old version of Internet Explorer.

5-Hydroxyindoleacetic acid (Urine)

Also known as: 5-HIAA, HIAA, Serotonin metabolite

Specimen requirements

Sample type: Urine (24 hour acetic acid bottle); Urine (Universal)

Collection requirements: Specimen must be protected from light, processed and frozen on day of receipt. Random urine specimen must be protected from light.


Price on application

Turnaround time

Please see Turnaround times

Analytical method

Mass Spectrometry

Analysis undertaken at these site(s)

John Radcliffe Hospital

Reference intervals


All ages: 10 - 40 µmol/24 hours

<5 µmol / mmol creatinine


All ages: 10 - 40 µmol/24 hours

<5 µmol / mmol creatinine