LOINCActiveObservation

LOINC Code 98240-5: CD154 cells Ql (T cells)

98240-5 is a LOINC code used to identify CD154 cells Ql (T cells) 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.CD154. It is commonly used with the system or sample type T cells.

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.CD154. It is commonly used with the system or sample type T cells.

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

  • CD154 cells [Presence] in T cells
  • Cells.CD154
  • CD154 cells; CD40 ligand; CD40L; Cell; CELL MARKERS; Cellularity; gp39; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; T prime; T-BAM; TRAP; Tumor necrosis factor Related Activation Protein; X-linked hyper IgM

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

CD154 cells Ql (T cells)CD154 cells [Presence] in T cellsCD154 cells T cells QlCells.CD154CELLMARKCD154 cells, T cellsPrThr

Frequently asked questions

Code details

Code98240-5
SystemLOINC
Display nameCD154 cells Ql (T cells)
DescriptionCells.CD154
Short nameCD154 cells T cells Ql
ComponentCells.CD154
PropertyPrThr
TimingPt
System (specimen)T cells
ScaleOrd
ClassCELLMARK
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.71
Last changed2.71

Consumer names

CD154 cells, T cells

Part names

Cells.CD154PrThrPtT cellsOrdCD154 cellsPresence or ThresholdPoint in time (spot)

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 98240-5 | HealthAssure