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 50342-5: Ependymal+Choroid plexus cells/Leukocytes (CSF) [Ratio]

Name: LOINC Code 50342-5: Ependymal+Choroid plexus cells/Leukocytes (CSF) [Ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.495Z

50342-5 is a LOINC code used to identify Ependymal+Choroid plexus cells/Leukocytes (CSF) [Ratio] 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 Ependymal+Choroid plexus cells/Leukocytes. It is commonly used with the system or sample type CSF.

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 Ependymal+Choroid plexus cells/Leukocytes. It is commonly used with the system or sample type CSF.

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

What it does not mean

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

Key facts

Ependymal+Choroid plexus cells/Leukocytes [Ratio] in Cerebral spinal fluid
Ependymal+Choroid plexus cells/Leukocytes
Cell; Cellularity; Cerebral spinal fluid; Cerebrospinal Fl; Ependy+Chor plex cells; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; WBC; WBCs; White blood cell; White blood cells

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

Ependymal+Choroid plexus cells/Leukocytes (CSF) [Ratio]Ependymal+Choroid plexus cells/Leukocytes [Ratio] in Cerebral spinal fluidEpendy+Chor plex cells CSF-RtoEpendymal+Choroid plexus cells/LeukocytesHEM/BCEpendymal+Choroid plexus cells/White Blood Cells, Spinal fluidRatio

Frequently asked questions

Code details

Code50342-5

SystemLOINC

Display nameEpendymal+Choroid plexus cells/Leukocytes (CSF) [Ratio]

DescriptionEpendymal+Choroid plexus cells/Leukocytes

Short nameEpendy+Chor plex cells CSF-Rto

ComponentEpendymal+Choroid plexus cells/Leukocytes

PropertyRatio

TimingPt

System (specimen)CSF

ScaleQn

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.79

Consumer names

Ependymal+Choroid plexus cells/White Blood Cells, Spinal fluid

Part names

Ependymal+Choroid plexus cells/LeukocytesRatioPtCSFQnPoint in time (spot)Cerebral spinal fluid

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.