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 74137-1: Norfentanyl Confirm (S/P/Bld) [Mass/Vol]

Name: LOINC Code 74137-1: Norfentanyl Confirm (S/P/Bld) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:53.973Z

74137-1 is a LOINC code used to identify Norfentanyl Confirm (S/P/Bld) [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 Norfentanyl. It is commonly used with the system or sample type Ser/Plas/Bld.

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 Norfentanyl. It is commonly used with the system or sample type Ser/Plas/Bld.

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
Method: Confirm

What it does not mean

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

Key facts

Norfentanyl [Mass/volume] in Serum, Plasma or Blood by Confirmatory method
Norfentanyl
Addiction; Blood; Cfm; CNFR; CNFRM; Conf; Confirmation; Confirmatory; DRUG/TOXICOLOGY; Drugs; Drugs of abuse; Fentanyl metabolite; GCMS; Illicit; LC/MS/MS; Level; Mass concentration; Pl; PlasBld; Plasma; Plsm; Point in time; PotentialForAbuse; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; SerPlBld; Serum; Serum or plasma; Serum, plasma or whole blood; SR; WB; Whole blood

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

Norfentanyl Confirm (S/P/Bld) [Mass/Vol]Norfentanyl [Mass/volume] in Serum, Plasma or Blood by Confirmatory methodNorfentanyl SerPlBld Cfm-mCncNorfentanylDRUG/TOXNorfentanyl, BloodMCnc

Frequently asked questions

Code details

Code74137-1

SystemLOINC

Display nameNorfentanyl Confirm (S/P/Bld) [Mass/Vol]

DescriptionNorfentanyl

Short nameNorfentanyl SerPlBld Cfm-mCnc

ComponentNorfentanyl

PropertyMCnc

TimingPt

System (specimen)Ser/Plas/Bld

ScaleQn

MethodConfirm

ClassDRUG/TOX

Example unitsng/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.46

Last changed2.73

Consumer names

Norfentanyl, Blood

Part names

NorfentanylMCncPtSer/Plas/BldQnConfirmMass ConcentrationPoint in time (spot)Serum, Plasma or Blood

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.