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 1458-9: Creatinine pre 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]

Name: LOINC Code 1458-9: Creatinine pre 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:25.110Z

1458-9 is a LOINC code used to identify Creatinine pre 500 ug dexamethasone PO 2.5 day low dose q6h (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 Creatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6h. 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 Creatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6h. 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

Creatinine [Mass/volume] in 24 hour Urine --pre 500 ug dexamethasone PO 2.5 day low dose q6h
Creatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6h
1 day; 24 hours; 24HR; Before; c350; CHEMISTRY.CHALLENGE TESTING; CR; Crea; Creat; Decadron; Dexameth; Dexone; Hexadrol; Level; lo dose; Mass Concentration; mcg; QNT; Quan; Quant; Quantitative; UA; UCr; 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

Creatinine pre 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]Creatinine [Mass/volume] in 24 hour Urine --pre 500 ug dexamethasone PO 2.5 day low dose q6hCreat pre 500 ug Dex 24h Ur-mCncCreatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6hCHALCreatinine before 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, UrineMCnc

Frequently asked questions

Code details

Code1458-9

SystemLOINC

Display nameCreatinine pre 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]

DescriptionCreatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6h

Short nameCreat pre 500 ug Dex 24h Ur-mCnc

ComponentCreatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6h

PropertyMCnc

Timing24H

System (specimen)Urine

ScaleQn

ClassCHAL

Example unitsg/L; mcg/mL; mg/dL; mg/mL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.40

Consumer names

Creatinine before 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, Urine

Part names

Creatinine^pre 500 ug dexamethasone PO 2.5 day low dose q6hMCnc24HUrineQnMass 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.