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 54437-9: Sodium urate Infrared spectroscopy (Stone) [Mass fraction]

Name: LOINC Code 54437-9: Sodium urate Infrared spectroscopy (Stone) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.583Z

54437-9 is a LOINC code used to identify Sodium urate Infrared spectroscopy (Stone) [Mass fraction] 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 Sodium urate/Total. It is commonly used with the system or sample type Calculus.

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 Sodium urate/Total. It is commonly used with the system or sample type Calculus.

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
Method: Infrared spectroscopy

What it does not mean

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

Key facts

Sodium urate/Total in Stone by Infrared spectroscopy
Sodium urate/Total
Calc; Calculi; Chemistry; Gastro; Gastroenterology; GI; Infared spectoscopy; IR; Kidney; Mass Fraction; Monosodium Urate; Na; Na Urate; Na+; NaU; Nephrology; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; Stn; Stone; Stones; Tot; Totl; UA; Urates; Uric acid

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

Sodium urate Infrared spectroscopy (Stone) [Mass fraction]Sodium urate/Total in Stone by Infrared spectroscopyNa Urate MFr Stone IRSodium urate/TotalCHEMSodium urate, StoneMFr

Frequently asked questions

Code details

Code54437-9

SystemLOINC

Display nameSodium urate Infrared spectroscopy (Stone) [Mass fraction]

DescriptionSodium urate/Total

Short nameNa Urate MFr Stone IR

ComponentSodium urate/Total

PropertyMFr

TimingPt

System (specimen)Calculus

ScaleQn

MethodInfrared spectroscopy

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.73

Consumer names

Sodium urate, Stone

Part names

Sodium urate/TotalMFrPtCalculusQnInfrared spectroscopyMass fractionPoint in time (spot)Calculus (stone)

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.