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.

LOINCActiveBoth

LOINC Code 46138-4: Urate crystals LM.HPF (Urine sed) [#/Area]

Name: LOINC Code 46138-4: Urate crystals LM.HPF (Urine sed) [#/Area]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

46138-4 is a LOINC code used to identify Urate crystals LM.HPF (Urine sed) [#/Area] 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 Urate crystals. It is commonly used with the system or sample type Urine sed.

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 Urate crystals. It is commonly used with the system or sample type Urine sed.

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
Method: Microscopy.light.HPF

What it does not mean

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

Key facts

Urate crystals [#/area] in Urine sediment by Microscopy high power field
Urate crystals
#/area; Crys; Cryst; Crystal; Kidney; LM; Micro; Micros; Microscopic; Nephrology; Number areic; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; UA; UR; Urates; Uric acid; URINALYSIS; Urine sediment; Urn; UrnS

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Urate crystals LM.HPF (Urine sed) [#/Area] (46138-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Urate crystals LM.HPF (Urine sed) [#/Area]Urate crystals [#/area] in Urine sediment by Microscopy high power fieldUrate Cry #/area UrnS HPFUrate crystalsUAUrate crystals, Urine sedimentNaric

Frequently asked questions

Code details

Code46138-4

SystemLOINC

Display nameUrate crystals LM.HPF (Urine sed) [#/Area]

DescriptionUrate crystals

Short nameUrate Cry #/area UrnS HPF

ComponentUrate crystals

PropertyNaric

TimingPt

System (specimen)Urine sed

ScaleQn

MethodMicroscopy.light.HPF

ClassUA

Example units/HPF

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.73

Consumer names

Urate crystals, Urine sediment

Part names

Urate crystalsNaricPtUrine sedQnMicroscopy.light.HPFNumber Areic (per area)Point in time (spot)Urine sedimentMicroscopy high power field

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.