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 53331-5: Crystals.amorphous Computer assisted (U) [#/Vol]

Name: LOINC Code 53331-5: Crystals.amorphous Computer assisted (U) [#/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.030Z

53331-5 is a LOINC code used to identify Crystals.amorphous Computer assisted (U) [#/Vol] 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 Crystals.amorphous. 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 Crystals.amorphous. 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: Observation
Method: Computer assisted

What it does not mean

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

Key facts

Crystals.amorphous [#/volume] in Urine by Computer assisted method
Crystals.amorphous
#; ABS; absolute; absolutes; AM; Amorph; Amorph Cry; Amorphic; Artificial Intelligence; Automated detection; Cnt; Comp Assist; Count; Count/volume; Crys; Cryst; Crystal; CT; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; UA; UR; URINALYSIS; 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

Crystals.amorphous Computer assisted (U) [#/Vol]Crystals.amorphous [#/volume] in Urine by Computer assisted methodAmorph Cry # Ur Comp AssistCrystals.amorphousUACrystals.amorphous, UrineNCnc

Frequently asked questions

Code details

Code53331-5

SystemLOINC

Display nameCrystals.amorphous Computer assisted (U) [#/Vol]

DescriptionCrystals.amorphous

Short nameAmorph Cry # Ur Comp Assist

ComponentCrystals.amorphous

PropertyNCnc

TimingPt

System (specimen)Urine

ScaleQn

MethodComputer assisted

ClassUA

Example units/uL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.73

Consumer names

Crystals.amorphous, Urine

Part names

Crystals.amorphousNCncPtUrineQnComputer assistedNumber ConcentrationPoint in time (spot)Computer assisted method

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.