LOINCActiveBoth

LOINC Code 58423-5: Ethyl sulfate/Creatinine (U) [Mass ratio]

58423-5 is a LOINC code used to identify Ethyl sulfate/Creatinine (U) [Mass ratio] 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 Ethyl sulfate/Creatinine. 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 Ethyl sulfate/Creatinine. 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: Both

What it does not mean

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

Key facts

  • Ethyl sulfate/Creatinine [Mass Ratio] in Urine
  • Ethyl sulfate/Creatinine
  • CR; Crea; Creat; DRUG/TOXICOLOGY; Drugs; Ethanol metabolite; ethyl hydrogen sulfate; Mass concentration ratio; Mass ratio; MCRto; Point in time; QNT; Quan; Quant; Quantitative; Random; SO4; SO4-2; Sulf; Sulfovinate; Sulfovinic acid; 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

Ethyl sulfate/Creatinine (U) [Mass ratio]Ethyl sulfate/Creatinine [Mass Ratio] in UrineEthyl sulfate/Creat UrEthyl sulfate/CreatinineDRUG/TOXEthyl sulfate/Creatinine, UrineMRto

Frequently asked questions

Code details

Code58423-5
SystemLOINC
Display nameEthyl sulfate/Creatinine (U) [Mass ratio]
DescriptionEthyl sulfate/Creatinine
Short nameEthyl sulfate/Creat Ur
ComponentEthyl sulfate/Creatinine
PropertyMRto
TimingPt
System (specimen)Urine
ScaleQn
ClassDRUG/TOX
Example unitsug/g creatinine
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.30
Last changed2.73

Consumer names

Ethyl sulfate/Creatinine, Urine

Part names

Ethyl sulfate/CreatinineMRtoPtUrineQnMass RatioPoint 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.

LOINC Code 58423-5 | HealthAssure