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 99890-6: Crystal casts Computer assisted (Urine sed) [#/Vol]

Name: LOINC Code 99890-6: Crystal casts Computer assisted (Urine sed) [#/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:34.291Z

99890-6 is a LOINC code used to identify Crystal casts Computer assisted (Urine sed) [#/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 Crystal casts. 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 Crystal casts. 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: Computer assisted

What it does not mean

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

Key facts

Crystal casts [#/volume] in Urine sediment by Computer assisted method
Crystal casts
#; ABS; absolute; absolutes; Artificial Intelligence; Automated detection; Cast; Cnt; Comp Assist; Count; Count/volume; CT; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Crystal casts Computer assisted (Urine sed) [#/Vol]Crystal casts [#/volume] in Urine sediment by Computer assisted methodCrystal casts # UrnS Comp AssistCrystal castsUACrystal casts, Urine sedimentNCnc

Frequently asked questions

Code details

Code99890-6

SystemLOINC

Display nameCrystal casts Computer assisted (Urine sed) [#/Vol]

DescriptionCrystal casts

Short nameCrystal casts # UrnS Comp Assist

ComponentCrystal casts

PropertyNCnc

TimingPt

System (specimen)Urine sed

ScaleQn

MethodComputer assisted

ClassUA

Example unitsp/ul

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Crystal casts, Urine sediment

Part names

Crystal castsNCncPtUrine sedQnComputer assistedNumber ConcentrationPoint in time (spot)Urine sedimentComputer 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.