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.

LOINCObservation

LOINC Code 13350-4: Eosinophils/100 WBC Manual cnt (CSF)

Name: LOINC Code 13350-4: Eosinophils/100 WBC Manual cnt (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:23.611Z

13350-4 is a LOINC code used to identify Eosinophils/100 WBC Manual cnt (CSF) 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 Eosinophils/100 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 Eosinophils/100 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: DEPRECATED
Order vs observation: Observation
Method: Manual count

What it does not mean

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

Key facts

Deprecated Eosinophils/100 leukocytes in Cerebral spinal fluid by Manual count
Eosinophils/100 leukocytes
100WBC; Cerebral spinal fluid; Cerebrospinal Fl; Eos; Eosin; Eosino; Eosinophil; Eosins; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Manl; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Eosinophils/100 WBC Manual cnt (CSF)Deprecated Eosinophils/100 leukocytes in Cerebral spinal fluid by Manual countDeprecated Eosinophil Fr CSF ManualEosinophils/100 leukocytesHEM/BCEosinophils per 100 white blood cells, Spinal fluidNFr

Frequently asked questions

Code details

Code13350-4

SystemLOINC

Display nameEosinophils/100 WBC Manual cnt (CSF)

DescriptionEosinophils/100 leukocytes

Short nameDeprecated Eosinophil Fr CSF Manual

ComponentEosinophils/100 leukocytes

PropertyNFr

TimingPt

System (specimen)CSF

ScaleQn

MethodManual count

ClassHEM/BC

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.46

Consumer names

Eosinophils per 100 white blood cells, Spinal fluid

Part names

Eosinophils/100 leukocytesNFrPtCSFQnManual countNumber FractionPoint 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.