LOINCActiveObservation

LOINC Code 31123-3: CD25 cells (Bld) [#/Vol]

31123-3 is a LOINC code used to identify CD25 cells (Bld) [#/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 Cells.CD25. 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.CD25. 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

  • CD25 cells [#/volume] in Blood
  • Cells.CD25
  • #; ABS; absolute; absolutes; Blood; CD25 Cells; Cell; CELL MARKERS; Cellularity; Cnt; Count; Count/volume; CT; IL-2 receptor alpha chain; IL-2R; IL-2R Tac antigen; ILR2; Number concentration; Number Concentration (count/vol); Point in time; QNT; Quan; Quant; Quantitative; Random; Tac antigen; 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

CD25 cells (Bld) [#/Vol]CD25 cells [#/volume] in BloodCD25 Cells # BldCells.CD25CELLMARKCD25 cells, BloodNCnc

Frequently asked questions

Code details

Code31123-3
SystemLOINC
Display nameCD25 cells (Bld) [#/Vol]
DescriptionCells.CD25
Short nameCD25 Cells # Bld
ComponentCells.CD25
PropertyNCnc
TimingPt
System (specimen)Bld
ScaleQn
ClassCELLMARK
Example units10*6/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.07
Last changed2.73

Consumer names

CD25 cells, Blood

Part names

Cells.CD25NCncPtBldQnCD25 cellsNumber ConcentrationPoint 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 31123-3 | HealthAssure