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.

LOINCActiveObservation

LOINC Code 19637-8: Norpropoxyphene cutoff Confirm (U) [Mass/Vol]

Name: LOINC Code 19637-8: Norpropoxyphene cutoff Confirm (U) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.198Z

19637-8 is a LOINC code used to identify Norpropoxyphene cutoff Confirm (U) [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 Norpropoxyphene cutoff. It is commonly used with the system or sample type Urine.

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 Norpropoxyphene cutoff. It is commonly used with the system or sample type Urine.

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: Observation
Method: Confirm

What it does not mean

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

Key facts

Norpropoxyphene cutoff [Mass/volume] in Urine for Confirmatory method
Norpropoxyphene cutoff
Cfm; CNFR; CNFRM; Conf; Confirmation; Confirmatory; CtO; DRUG/TOXICOLOGY; Drugs; GCMS; LC/MS/MS; Level; Mass concentration; n-desmethylproproxyphene; Norpropoxyp; Point in time; Propoxyphene metabolite; QNT; Quan; Quant; Quantitative; Random; UA; UR; Urn

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

Norpropoxyphene cutoff Confirm (U) [Mass/Vol]Norpropoxyphene cutoff [Mass/volume] in Urine for Confirmatory methodNorpropoxyph CtO Ur Cfm-mCncNorpropoxyphene cutoffDRUG/TOXNorpropoxyphene cutoff, UrineMCnc

Frequently asked questions

Code details

Code19637-8

SystemLOINC

Display nameNorpropoxyphene cutoff Confirm (U) [Mass/Vol]

DescriptionNorpropoxyphene cutoff

Short nameNorpropoxyph CtO Ur Cfm-mCnc

ComponentNorpropoxyphene cutoff

PropertyMCnc

TimingPt

System (specimen)Urine

ScaleQn

MethodConfirm

ClassDRUG/TOX

Example unitsng/mL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.44

Consumer names

Norpropoxyphene cutoff, Urine

Part names

Norpropoxyphene cutoffMCncPtUrineQnConfirmMass 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.