LOINCActiveObservation

LOINC Code 25121-5: Octenedioate (C8:1)/Creatinine (U) [Molar ratio]

25121-5 is a LOINC code used to identify Octenedioate (C8:1)/Creatinine (U) [Molar 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 Octenedioate/Creatinine. It is commonly used with the system or sample type Urine.

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 Octenedioate/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: Observation

What it does not mean

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

Key facts

Octenedioate (C81)/Creatinine [Molar ratio] in Urine
Octenedioate/Creatinine
Chemistry; CR; Crea; Creat; Octenedioic acid; Point in time; QNT; Quan; Quant; Quantitative; Random; Scrto; Substance concentration ratio; Substance ratio; 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

Octenedioate (C8:1)/Creatinine (U) [Molar ratio]Octenedioate (C8:1)/Creatinine [Molar ratio] in UrineOctenedioate/Creat Ur-sRtoOctenedioate/CreatinineCHEMOctenedioate (C8:1)/Creatinine, UrineSRto

Frequently asked questions

Code details

Code25121-5
SystemLOINC
Display nameOctenedioate (C8:1)/Creatinine (U) [Molar ratio]
DescriptionOctenedioate/Creatinine
Short nameOctenedioate/Creat Ur-sRto
ComponentOctenedioate/Creatinine
PropertySRto
TimingPt
System (specimen)Urine
ScaleQn
ClassCHEM
Example unitsmmol/mol creatinine
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.73

Consumer names

Octenedioate (C8:1)/Creatinine, Urine

Part names

Octenedioate/CreatinineSRtoPtUrineQnSubstance 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 25121-5 | HealthAssure