LOINCActiveBoth

LOINC Code 53149-1: Iron/Creatinine (24H U) [Molar ratio]

53149-1 is a LOINC code used to identify Iron/Creatinine (24H 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 Iron/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 Iron/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

  • Iron/Creatinine [Molar ratio] in 24 hour Urine
  • Iron/Creatinine
  • 1 day; 24 hours; 24HR; Chemistry; CR; Crea; Creat; Fe; QNT; Quan; Quant; Quantitative; 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

Iron/Creatinine (24H U) [Molar ratio]Iron/Creatinine [Molar ratio] in 24 hour UrineIron/Creat 24h Ur-sRtoIron/CreatinineCHEMIron/Creatinine, UrineSRto

Frequently asked questions

Code details

Code53149-1
SystemLOINC
Display nameIron/Creatinine (24H U) [Molar ratio]
DescriptionIron/Creatinine
Short nameIron/Creat 24h Ur-sRto
ComponentIron/Creatinine
PropertySRto
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
Example unitsumol/mol creatinine
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.42

Consumer names

Iron/Creatinine, Urine

Part names

Iron/CreatinineSRto24HUrineQnSubstance Ratio24 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.

LOINC Code 53149-1 | HealthAssure