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 57796-5: Reducing substances p hydrolysis Ql (Stl)

Name: LOINC Code 57796-5: Reducing substances p hydrolysis Ql (Stl)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.757Z

57796-5 is a LOINC code used to identify Reducing substances p hydrolysis Ql (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 Reducing substances. 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 Reducing substances. 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: Both
Method: Post hydrolysis

What it does not mean

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

Key facts

Reducing substances [Presence] in Stool by Post hydrolysis

Reducing substances

This term represents the stool reducing substance assay after the addition of HCl, which hydrolysis sugars that are not typically reducing, such as sucrose, and converts them into a reducing form. Typical reducing substance assays [LOINC11060-1] detect reducing substances in stool without (or before) the addition of HCl, and therefore do not detect non-reducing sugars such as sucrose.

After; Bowel movement; Chemistry; Faecal; Faeces; Fecal; Feces; Ordinal; Point in time; PR; PST; QL; Qual; Qualitative; Random; Reduc; Reduc subs; Reducing substance; Screen; Stl; Stool = Fecal

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

Reducing substances p hydrolysis Ql (Stl)Reducing substances [Presence] in Stool by Post hydrolysisReducing Subs Stl Ql Post hydrolysisReducing substancesCHEMReducing substances, StoolPrThr

Frequently asked questions

Code details

Code57796-5

SystemLOINC

Display nameReducing substances p hydrolysis Ql (Stl)

DescriptionReducing substances

Short nameReducing Subs Stl Ql Post hydrolysis

ComponentReducing substances

PropertyPrThr

TimingPt

System (specimen)Stool

ScaleOrd

MethodPost hydrolysis

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.73

Consumer names

Reducing substances, Stool

Part names

Reducing substancesPrThrPtStoolOrdPost hydrolysisPresence or ThresholdPoint in time (spot)

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.