LOINCActiveBoth

LOINC Code 34736-9: Calcium oxalate index (24H U) [Ratio]

34736-9 is a LOINC code used to identify Calcium oxalate index (24H U) [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 Calcium oxalate index. 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 Calcium oxalate index. 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

  • Calcium oxalate index in 24 hour Urine
  • Calcium oxalate index
  • 1 day; 24 hours; 24HR; Ca; CaC2O4; Cal; CaOx; CaOx index; Chemistry; Ethanedioate; Ethanedioic acid; Kidney; Nephrology; Oxal; Oxalic acid; QNT; Quan; Quant; Quantitative; Ratios; Renal; Rto; Saturation index; 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

Calcium oxalate index (24H U) [Ratio]Calcium oxalate index in 24 hour UrineCaOx index 24h Ur-RtoCalcium oxalate indexCHEMCalcium oxalate index, UrineRatio

Frequently asked questions

Code details

Code34736-9
SystemLOINC
Display nameCalcium oxalate index (24H U) [Ratio]
DescriptionCalcium oxalate index
Short nameCaOx index 24h Ur-Rto
ComponentCalcium oxalate index
PropertyRatio
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.11
Last changed2.73

Consumer names

Calcium oxalate index, Urine

Part names

Calcium oxalate indexRatio24HUrineQn24 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 34736-9 | HealthAssure