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 51648-4: Monocytoid cells/Leukocytes Manual cnt (CSF)

Name: LOINC Code 51648-4: Monocytoid cells/Leukocytes Manual cnt (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

51648-4 is a LOINC code used to identify Monocytoid cells/Leukocytes 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 Monocytoid cells/Leukocytes. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Monocytoid 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
Method: Manual count

What it does not mean

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

Key facts

Monocytoid cells/Leukocytes in Cerebral spinal fluid by Manual count
Monocytoid cells/Leukocytes
Cell; Cellularity; Cerebral spinal fluid; Cerebrospinal Fl; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Monocytoid cells/Leukocytes Manual cnt (CSF) (51648-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Monocytoid cells/Leukocytes Manual cnt (CSF)Monocytoid cells/Leukocytes in Cerebral spinal fluid by Manual countMonocytoid cells NFr CSF ManualMonocytoid cells/LeukocytesHEM/BCMonocytoid cells/White Blood Cells, Spinal fluidNFr

Frequently asked questions

Code details

Code51648-4

SystemLOINC

Display nameMonocytoid cells/Leukocytes Manual cnt (CSF)

DescriptionMonocytoid cells/Leukocytes

Short nameMonocytoid cells NFr CSF Manual

ComponentMonocytoid cells/Leukocytes

PropertyNFr

TimingPt

System (specimen)CSF

ScaleQn

MethodManual count

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.79

Consumer names

Monocytoid cells/White Blood Cells, Spinal fluid

Part names

Monocytoid cells/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.