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 57890-6: Pregnanediol pre dose dexamethasone (24H U) [Mass/Vol]

Name: LOINC Code 57890-6: Pregnanediol pre dose dexamethasone (24H U) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.758Z

57890-6 is a LOINC code used to identify Pregnanediol pre dose dexamethasone (24H 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 Pregnanediol^pre dose dexamethasone. 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 Pregnanediol^pre dose dexamethasone. 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

What it does not mean

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

Key facts

Pregnanediol [Mass/volume] in 24 hour Urine --pre dose dexamethasone
Pregnanediol^pre dose dexamethasone
1 day; 24 hours; 24HR; Before; c350; CHEMISTRY.CHALLENGE TESTING; Decadron; Dexameth; Dexone; Hexadrol; Level; Mass concentration; Pre Dex; Pregnanedi; PTL; QNT; Quan; Quant; Quantitative; 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

Pregnanediol pre dose dexamethasone (24H U) [Mass/Vol]Pregnanediol [Mass/volume] in 24 hour Urine --pre dose dexamethasonePregnanediol Pre Dex 24h Ur-mCncPregnanediol^pre dose dexamethasoneCHALPregnanediol before dose dexamethasone, UrineMCnc

Frequently asked questions

Code details

Code57890-6

SystemLOINC

Display namePregnanediol pre dose dexamethasone (24H U) [Mass/Vol]

DescriptionPregnanediol^pre dose dexamethasone

Short namePregnanediol Pre Dex 24h Ur-mCnc

ComponentPregnanediol^pre dose dexamethasone

PropertyMCnc

Timing24H

System (specimen)Urine

ScaleQn

ClassCHAL

Example unitsmg/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.70

Consumer names

Pregnanediol before dose dexamethasone, Urine

Part names

Pregnanediol^pre dose dexamethasoneMCnc24HUrineQnMass Concentration24 hours

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.