LOINCActiveObservation

LOINC Code 33028-2: WBC (Bld BPU) [#/Vol]

33028-2 is a LOINC code used to identify WBC (Bld BPU) [#/Vol] 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 Leukocytes. It is commonly used with the system or sample type Bld^BPU.

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 Leukocytes. It is commonly used with the system or sample type Bld^BPU.

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

  • Leukocytes [#/volume] in Blood from Blood product unit
  • Leukocytes
  • #; ABS; absolute; absolutes; Blood; Blood product unit; Blood Product Unit (Pack); Cnt; Count; Count/volume; CT; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; WB; WBC; WBCs; White blood cell; White blood cells; Whole blood

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

WBC (Bld BPU) [#/Vol]Leukocytes [#/volume] in Blood from Blood product unitWBC # Bld BPULeukocytesHEM/BCWhite blood cell (WBC) count, Blood Product UnitNCnc

Frequently asked questions

Code details

Code33028-2
SystemLOINC
Display nameWBC (Bld BPU) [#/Vol]
DescriptionLeukocytes
Short nameWBC # Bld BPU
ComponentLeukocytes
PropertyNCnc
TimingPt
System (specimen)Bld^BPU
ScaleQn
ClassHEM/BC
Example units10*3/uL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.70

Consumer names

White blood cell (WBC) count, Blood Product Unit

Part names

LeukocytesNCncPtBld^BPUQnNumber ConcentrationPoint in time (spot)Blood^BPU

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 33028-2 | HealthAssure