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 40518-3: Plasma cells/Leukocytes Manual cnt (Periton fld)

Name: LOINC Code 40518-3: Plasma cells/Leukocytes Manual cnt (Periton fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40518-3 is a LOINC code used to identify Plasma cells/Leukocytes Manual cnt (Periton fld) 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 Plasma cells/Leukocytes. It is commonly used with the system or sample type Periton fld.

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 Plasma cells/Leukocytes. It is commonly used with the system or sample type Periton fld.

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

Plasma cells/Leukocytes in Peritoneal fluid by Manual count
Plasma cells/Leukocytes
Ascites; Ascitic fluid; Ascitis; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Manl; Myeloma cells; Number fraction; Percent; Peritoneal fluid; Plasmacyte; Plasmacytes; Point in time; Prt; QNT; Quan; Quant; Quantitative; Random; 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

Plasma cells/Leukocytes Manual cnt (Periton fld)Plasma cells/Leukocytes in Peritoneal fluid by Manual countPlasma Cells NFr Prt ManualPlasma cells/LeukocytesHEM/BCPlasma cells/White Blood Cells, Peritoneal fluidNFr

Frequently asked questions

Code details

Code40518-3

SystemLOINC

Display namePlasma cells/Leukocytes Manual cnt (Periton fld)

DescriptionPlasma cells/Leukocytes

Short namePlasma Cells NFr Prt Manual

ComponentPlasma cells/Leukocytes

PropertyNFr

TimingPt

System (specimen)Periton fld

ScaleQn

MethodManual count

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.79

Consumer names

Plasma cells/White Blood Cells, Peritoneal fluid

Part names

Plasma cells/leukocytesNFrPtPeriton fldQnManual countNumber FractionPoint in time (spot)Peritoneal 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.