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 60438-9: Diamine oxidase Qn

Name: LOINC Code 60438-9: Diamine oxidase Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

60438-9 is a LOINC code used to identify Diamine oxidase Qn 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 Diamine oxidase. 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 Diamine oxidase. 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

Diamine oxidase [Units/volume] in Serum or Plasma
Diamine oxidase
This is an enzyme but its concentration is measured immunologically. Therfore the property is ACnc and not CCnc
Amine oxidase; Arbitrary concentration; Chemistry; DAO; Diaminobenzidine Oxidase; Histaminase; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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 Diamine oxidase Qn (60438-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Diamine oxidase QnDiamine oxidase [Units/volume] in Serum or PlasmaDiamine oxidase SerPl-aCncDiamine oxidaseCHEMDiamine oxidase, BloodACnc

Frequently asked questions

Code details

Code60438-9

SystemLOINC

Display nameDiamine oxidase Qn

DescriptionDiamine oxidase

Short nameDiamine oxidase SerPl-aCnc

ComponentDiamine oxidase

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example unitsarb U/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.34

Last changed2.70

Consumer names

Diamine oxidase, Blood

Part names

Diamine oxidaseACncPtSer/PlasQnArbitrary 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.