LOINCActiveObservation

LOINC Code 17603-2: Specimen volume (24H Stl)

17603-2 is a LOINC code used to identify Specimen volume (24H Stl) 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 Specimen volume. It is commonly used with the system or sample type Stool.

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 Specimen volume. It is commonly used with the system or sample type Stool.

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: Observation

What it does not mean

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

Key facts

  • Volume of 24 hour Stool
  • Specimen volume
  • 1 day; 24 hours; 24HR; Bowel movement; Faecal; Faeces; Fecal; Feces; QNT; Quan; Quant; Quantitative; Spec; Stl; Stool = Fecal; Vol; Volume

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

Specimen volume (24H Stl)Volume of 24 hour StoolSpecimen vol 24h StlSpecimen volumeSPECSpecimen volume, StoolVol

Frequently asked questions

Code details

Code17603-2
SystemLOINC
Display nameSpecimen volume (24H Stl)
DescriptionSpecimen volume
Short nameSpecimen vol 24h Stl
ComponentSpecimen volume
PropertyVol
Timing24H
System (specimen)Stool
ScaleQn
ClassSPEC
Example unitsmL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.42

Consumer names

Specimen volume, Stool

Part names

Specimen volumeVol24HStoolQnVolume24 hours

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.

LOINC Code 17603-2 | HealthAssure