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 40483-0: Phosphate crystals amorphous LM.LPF (Urine sed) [#/Area]

Name: LOINC Code 40483-0: Phosphate crystals amorphous LM.LPF (Urine sed) [#/Area]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40483-0 is a LOINC code used to identify Phosphate crystals amorphous LM.LPF (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 Phosphate crystals.amorphous. It is commonly used with the system or sample type Urine sed.

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 Phosphate crystals.amorphous. 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: Observation
Method: Microscopy.light.LPF

What it does not mean

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

Key facts

Phosphate crystals amorphous [#/area] in Urine sediment by Microscopy low power field
Phosphate crystals.amorphous
#/area; AM; Amorph; Amorph Cry; Amorph Phos Cry; Amorphic; Crys; Cryst; Crystal; i Phos; Inorganic phosphate; Kidney; LM; Micro; Micros; Microscopic; Nephrology; Number areic; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; UA; UR; 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.

Common synonyms

Phosphate crystals amorphous LM.LPF (Urine sed) [#/Area]Phosphate crystals amorphous [#/area] in Urine sediment by Microscopy low power fieldAmorph Phos Cry #/area UrnS LPFPhosphate crystals.amorphousUAPhosphate crystals amorphous, Urine sedimentNaric

Frequently asked questions

Code details

Code40483-0

SystemLOINC

Display namePhosphate crystals amorphous LM.LPF (Urine sed) [#/Area]

DescriptionPhosphate crystals.amorphous

Short nameAmorph Phos Cry #/area UrnS LPF

ComponentPhosphate crystals.amorphous

PropertyNaric

TimingPt

System (specimen)Urine sed

ScaleQn

MethodMicroscopy.light.LPF

ClassUA

Example units/LPF

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.70

Consumer names

Phosphate crystals amorphous, Urine sediment

Part names

Phosphate crystals.amorphousNaricPtUrine sedQnMicroscopy.light.LPFPhosphate crystals amorphousNumber Areic (per area)Point in time (spot)Urine sedimentMicroscopy low 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.