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 26489-5: Mononuclear cells (CSF) [#/Vol]

Name: LOINC Code 26489-5: Mononuclear cells (CSF) [#/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.093Z

26489-5 is a LOINC code used to identify Mononuclear cells (CSF) [#/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 Mononuclear cells. 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 Mononuclear cells. 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

Mononuclear cells [#/volume] in Cerebral spinal fluid
Mononuclear cells
#; ABS; absolute; absolutes; Cell; Cellularity; Cerebral spinal fluid; Cerebrospinal Fl; Cnt; Count; Count/volume; CT; HEMATOLOGY/CELL COUNTS; Mononuc; Mononuc Cells; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Mononuclear cells (CSF) [#/Vol]Mononuclear cells [#/volume] in Cerebral spinal fluidMononuc Cells # CSFMononuclear cellsHEM/BCMononuclear cells, Spinal fluidNCnc

Frequently asked questions

Code details

Code26489-5

SystemLOINC

Display nameMononuclear cells (CSF) [#/Vol]

DescriptionMononuclear cells

Short nameMononuc Cells # CSF

ComponentMononuclear cells

PropertyNCnc

TimingPt

System (specimen)CSF

ScaleQn

ClassHEM/BC

Example units10*3/uL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.44

Consumer names

Mononuclear cells, Spinal fluid

Part names

Mononuclear cellsNCncPtCSFQnNumber ConcentrationPoint 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.