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LOINC Code 21384-3: Mesothelial cells LM Ql (Periton fld)

21384-3 is a LOINC code used to identify Mesothelial cells LM Ql (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 Mesothelial cells. It is commonly used with the system or sample type Periton fld.

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 Mesothelial cells. 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: Microscopy.light

What it does not mean

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

Key facts

  • Mesothelial cells [Presence] in Peritoneal fluid by Light microscopy
  • Mesothelial cells
  • Ascites; Ascitic fluid; Ascitis; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; LM; Mesothl; Mesothl Cell; Micro; Micros; Microscopic; Ordinal; Peritoneal fluid; Point in time; PR; QL; Qual; Qualitative; Random; Screen

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

Mesothelial cells LM Ql (Periton fld)Mesothelial cells [Presence] in Peritoneal fluid by Light microscopyMesothl Cell Prt Ql MicroMesothelial cellsHEM/BCMesothelial cells, Peritoneal fluidPrThr

Frequently asked questions

Code details

Code21384-3
SystemLOINC
Display nameMesothelial cells LM Ql (Periton fld)
DescriptionMesothelial cells
Short nameMesothl Cell Prt Ql Micro
ComponentMesothelial cells
PropertyPrThr
TimingPt
System (specimen)Periton fld
ScaleOrd
MethodMicroscopy.light
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.56

Consumer names

Mesothelial cells, Peritoneal fluid

Part names

Mesothelial cellsPrThrPtPeriton fldOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)Peritoneal fluidLight microscopy

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.