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 50040-5: Advanced oxidation protein products [Moles/Vol]

Name: LOINC Code 50040-5: Advanced oxidation protein products [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

50040-5 is a LOINC code used to identify Advanced oxidation protein products [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 Advanced oxidation protein products. It is commonly used with the system or sample type Ser/Plas.

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 Advanced oxidation protein products. It is commonly used with the system or sample type Ser/Plas.

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

Advanced oxidation protein products [Moles/volume] in Serum or Plasma
Advanced oxidation protein products
AOPP; Chemistry; Level; OAPP; Oxidized protein products; Pl; Plasma; Plsm; Point in time; PR; Prods; Product; Prot; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration

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 Advanced oxidation protein products [Moles/Vol] (50040-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Advanced oxidation protein products [Moles/Vol]Advanced oxidation protein products [Moles/volume] in Serum or PlasmaOAPP SerPl-sCncAdvanced oxidation protein productsCHEMAdvanced oxidation protein products, BloodSCnc

Frequently asked questions

Code details

Code50040-5

SystemLOINC

Display nameAdvanced oxidation protein products [Moles/Vol]

DescriptionAdvanced oxidation protein products

Short nameOAPP SerPl-sCnc

ComponentAdvanced oxidation protein products

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example unitsumol/l

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.70

Consumer names

Advanced oxidation protein products, Blood

Part names

Advanced oxidation protein productsSCncPtSer/PlasQnSubstance ConcentrationPoint in time (spot)Serum or Plasma

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.