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.

LOINCBoth

LOINC Code 2531-2: LDH (Periton fld) [Catalytic activity/Vol]

Name: LOINC Code 2531-2: LDH (Periton fld) [Catalytic activity/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

2531-2 is a LOINC code used to identify LDH (Periton fld) [Catalytic activity/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 Lactate dehydrogenase. It is commonly used with the system or sample type Periton fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Lactate dehydrogenase. It is commonly used with the system or sample type Periton fld.

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: DISCOURAGED
Order vs observation: Both

What it does not mean

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

Key facts

Lactate dehydrogenase [Enzymatic activity/volume] in Peritoneal fluid
Lactate dehydrogenase
2-Hydroxypropanoic acid; 2-hydroxy-propionate; 2-hydroxy-propionic acid; Ascites; Ascitic fluid; Ascitis; Catalytic Concentration; Chemistry; Dehydrog; Dehyrdogenase; L.D.H; Lact; Lactic acid; Lactic acid dehydrogenase; LD; LDH; L-lactate; L-lactate dehydrogenase; Peritoneal fluid; Point in time; Prt; QNT; Quan; Quant; Quantitative; Random; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for LDH (Periton fld) [Catalytic activity/Vol] (2531-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

LDH (Periton fld) [Catalytic activity/Vol]Lactate dehydrogenase [Enzymatic activity/volume] in Peritoneal fluidLDH Prt-cCncLactate dehydrogenaseCHEMLactate Dehydrogenase (LDH), Peritoneal fluidCCnc

Frequently asked questions

Code details

Code2531-2

SystemLOINC

Display nameLDH (Periton fld) [Catalytic activity/Vol]

DescriptionLactate dehydrogenase

Short nameLDH Prt-cCnc

ComponentLactate dehydrogenase

PropertyCCnc

TimingPt

System (specimen)Periton fld

ScaleQn

ClassCHEM

Example unitsarb U/L

StatusDISCOURAGED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Lactate Dehydrogenase (LDH), Peritoneal fluid

Part names

Lactate dehydrogenaseCCncPtPeriton fldQnCatalytic ConcentrationPoint in time (spot)Peritoneal 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.