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 74975-4: Nordiazepam trough [Mass/Vol]

Name: LOINC Code 74975-4: Nordiazepam trough [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

74975-4 is a LOINC code used to identify Nordiazepam trough [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 Nordiazepam^trough. 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 Nordiazepam^trough. 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

Nordiazepam [Mass/volume] in Serum or Plasma --trough
Nordiazepam^trough
Calmday; Chlordiazepoxide metabolite; Desmethyldiazepam; Diazepam metabolite; Dimethyldiazepam; DRUG/TOXICOLOGY; Drugs; Level; Madar; Mass concentration; n-dimethyldiazepam; Nordaz; Nordazepam; Nordiaze; Pl; Plasma; Plsm; Point in time; Praxadium; Prazepam metabolite; Pre; Predose; Pre-dose; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Stilny; Tranxilium N; Vegesan

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 Nordiazepam trough [Mass/Vol] (74975-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Nordiazepam trough [Mass/Vol]Nordiazepam [Mass/volume] in Serum or Plasma --troughNordiazepam Trough SerPl-mCncNordiazepam^troughDRUG/TOXNordiazepam trough, BloodMCnc

Frequently asked questions

Code details

Code74975-4

SystemLOINC

Display nameNordiazepam trough [Mass/Vol]

DescriptionNordiazepam^trough

Short nameNordiazepam Trough SerPl-mCnc

ComponentNordiazepam^trough

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassDRUG/TOX

Example unitsug/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.48

Last changed2.48

Consumer names

Nordiazepam trough, Blood

Part names

Nordiazepam^troughMCncPtSer/PlasQnMass 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.