LOINCActiveObservation

LOINC Code 33373-2: Blasts/Leukocytes (Pleur fld)

33373-2 is a LOINC code used to identify Blasts/Leukocytes (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 Blasts/Leukocytes. 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 Blasts/Leukocytes. 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

  • Blasts/Leukocytes in Pleural fluid
  • Blasts/Leukocytes
  • Blast; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Number fraction; Percent; Pleural; Pleural fluid; Point in time; QNT; Quan; Quant; Quantitative; Random; thoracentesis 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.

Common synonyms

Blasts/Leukocytes (Pleur fld)Blasts/Leukocytes in Pleural fluidBlasts NFr PlrBlasts/LeukocytesHEM/BCBlasts/White Blood Cells, Pleural fluidNFr

Frequently asked questions

Code details

Code33373-2
SystemLOINC
Display nameBlasts/Leukocytes (Pleur fld)
DescriptionBlasts/Leukocytes
Short nameBlasts NFr Plr
ComponentBlasts/Leukocytes
PropertyNFr
TimingPt
System (specimen)Plr fld
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.79

Consumer names

Blasts/White Blood Cells, Pleural fluid

Part names

Blasts/leukocytesNFrPtPlr fldQnNumber FractionPoint 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 33373-2 | HealthAssure