What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 47544-2: 5-Hydroxyindoleacetate (CSF) [Moles/Vol]

Name: LOINC Code 47544-2: 5-Hydroxyindoleacetate (CSF) [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:32.261Z

47544-2 is a LOINC code used to identify 5-Hydroxyindoleacetate (CSF) [Moles/Vol] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component 5-Hydroxyindoleacetate. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component 5-Hydroxyindoleacetate. It is commonly used with the system or sample type CSF.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Both

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

5-Hydroxyindoleacetate [Moles/volume] in Cerebral spinal fluid
5-Hydroxyindoleacetate
5HIA; 5HIAA; 5-HIAA; 5-Hydroxy indoleacetate; 5-hydroxyindoleacetic acid; 5OH-indoleacetate; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Hydroxyindoacet; Level; Point in time; QNT; Quan; Quant; Quantitative; Random; Serotonin metabolite; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Substance concentration; Tumor marker

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

5-Hydroxyindoleacetate (CSF) [Moles/Vol]5-Hydroxyindoleacetate [Moles/volume] in Cerebral spinal fluid5OH-indoleacetate CSF-sCnc5-HydroxyindoleacetateCHEM5-Hydroxyindoleacetate, Spinal fluidSCnc

Frequently asked questions

Code details

Code47544-2

SystemLOINC

Display name5-Hydroxyindoleacetate (CSF) [Moles/Vol]

Description5-Hydroxyindoleacetate

Short name5OH-indoleacetate CSF-sCnc

Component5-Hydroxyindoleacetate

PropertySCnc

TimingPt

System (specimen)CSF

ScaleQn

ClassCHEM

Example unitsnmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.70

Consumer names

5-Hydroxyindoleacetate, Spinal fluid

Part names

5-HydroxyindoleacetateSCncPtCSFQnSubstance ConcentrationPoint in time (spot)Cerebral spinal fluid

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.