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 43163-5: Quaternary ammonium compound (Specimen) [Mass/Vol]

Name: LOINC Code 43163-5: Quaternary ammonium compound (Specimen) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

43163-5 is a LOINC code used to identify Quaternary ammonium compound (Specimen) [Mass/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 Quaternary ammonium compound. It is commonly used with the system or sample type XXX.

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 Quaternary ammonium compound. It is commonly used with the system or sample type XXX.

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

Quaternary ammonium compound [Mass/volume] in Specimen
Quaternary ammonium compound
Amm; Ammon; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; Misc; Miscellaneous; NH4; Other; Point in time; QAC; QNT; Quan; Quant; Quantitative; Random; Spec; To be specified in another part of the message; Unspecified

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 Quaternary ammonium compound (Specimen) [Mass/Vol] (43163-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Quaternary ammonium compound (Specimen) [Mass/Vol]Quaternary ammonium compound [Mass/volume] in SpecimenQAC Spec-mCncQuaternary ammonium compoundDRUG/TOXQuaternary ammonium compound, SpecimenMCnc

Frequently asked questions

Code details

Code43163-5

SystemLOINC

Display nameQuaternary ammonium compound (Specimen) [Mass/Vol]

DescriptionQuaternary ammonium compound

Short nameQAC Spec-mCnc

ComponentQuaternary ammonium compound

PropertyMCnc

TimingPt

System (specimen)XXX

ScaleQn

ClassDRUG/TOX

Example unitsmg/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.69

Consumer names

Quaternary ammonium compound, Specimen

Part names

Quaternary ammonium compoundMCncPtXXXQnMass ConcentrationPoint 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.