LOINCActiveObservation

LOINC Code 33250-2: CD55 cells Ql (Bld)

33250-2 is a LOINC code used to identify CD55 cells Ql (Bld) 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 Cells.CD55. It is commonly used with the system or sample type Bld.

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 Cells.CD55. It is commonly used with the system or sample type Bld.

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

  • CD55 cells [Presence] in Blood
  • Cells.CD55
  • Blood; CD55 Cells; Cell; CELL MARKERS; Cellularity; DAF; Decay accelerating factor; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; WB; 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

CD55 cells Ql (Bld)CD55 cells [Presence] in BloodCD55 Cells Bld QlCells.CD55CELLMARKCD55 cells, BloodPrThr

Frequently asked questions

Code details

Code33250-2
SystemLOINC
Display nameCD55 cells Ql (Bld)
DescriptionCells.CD55
Short nameCD55 Cells Bld Ql
ComponentCells.CD55
PropertyPrThr
TimingPt
System (specimen)Bld
ScaleOrd
ClassCELLMARK
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.73

Consumer names

CD55 cells, Blood

Part names

Cells.CD55PrThrPtBldOrdCD55 cellsPresence or ThresholdPoint in time (spot)Blood

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 33250-2 | HealthAssure