LOINCActiveObservation

LOINC Code 41263-5: Viscosity Ql (Pleur fld)

41263-5 is a LOINC code used to identify Viscosity Ql (Pleur 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 Viscosity. It is commonly used with the system or sample type Plr 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 Viscosity. It is commonly used with the system or sample type Plr 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

What it does not mean

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

Key facts

  • Viscosity of Pleural fluid Qualitative
  • Viscosity
  • Viscosity is the measurement of resistance of a liquid to flow and can be measured using qualitative or quantitative methods.
  • Ordinal; Pleural; Pleural fluid; Point in time; QL; Qual; Qualitative; Random; Screen; SPEC; thoracentesis fluid; Vicos; Viscos; Viscosity

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

Viscosity Ql (Pleur fld)Viscosity of Pleural fluid QualitativeVisc Plr QlViscositySPECViscosity, Pleural fluidVisc

Frequently asked questions

Code details

Code41263-5
SystemLOINC
Display nameViscosity Ql (Pleur fld)
DescriptionViscosity
Short nameVisc Plr Ql
ComponentViscosity
PropertyVisc
TimingPt
System (specimen)Plr fld
ScaleOrd
ClassSPEC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.15
Last changed2.54

Consumer names

Viscosity, Pleural fluid

Part names

ViscosityViscPtPlr fldOrdPoint in time (spot)Pleural 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.

LOINC Code 41263-5 | HealthAssure