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 99598-5: RBC.dysmorphic/Erythrocytes Auto (U)

Name: LOINC Code 99598-5: RBC.dysmorphic/Erythrocytes Auto (U)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99598-5 is a LOINC code used to identify RBC.dysmorphic/Erythrocytes Auto (U) 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 Erythrocytes.dysmorphic/Erythrocytes. 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 Erythrocytes.dysmorphic/Erythrocytes. 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: Automated count

What it does not mean

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

Key facts

Erythrocytes.dysmorphic/Erythrocytes in Urine by Automated count
Erythrocytes.dysmorphic/Erythrocytes
Auto; Automated detection; D Cells; DE; Discocytes; Dysmorphic RBC; Elec; Elect; Electr; Erthrocyte; Erythrocyte; Glomerular erythrocytes; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; 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

RBC.dysmorphic/Erythrocytes Auto (U)Erythrocytes.dysmorphic/Erythrocytes in Urine by Automated countDysmorphic RBC/RBC NFr Ur AutoErythrocytes.dysmorphic/ErythrocytesUADysmorphic red blood cells/Erythrocytes, UrineNFr

Frequently asked questions

Code details

Code99598-5

SystemLOINC

Display nameRBC.dysmorphic/Erythrocytes Auto (U)

DescriptionErythrocytes.dysmorphic/Erythrocytes

Short nameDysmorphic RBC/RBC NFr Ur Auto

ComponentErythrocytes.dysmorphic/Erythrocytes

PropertyNFr

TimingPt

System (specimen)Urine

ScaleQn

MethodAutomated count

ClassUA

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.79

Consumer names

Dysmorphic red blood cells/Erythrocytes, Urine

Part names

Erythrocytes.dysmorphic/ErythrocytesNFrPtUrineQnAutomated countNumber FractionPoint in time (spot)

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.