LOINCActiveBoth

LOINC Code 29596-4: CD25 Ag Immune stain Ql (Tiss)

29596-4 is a LOINC code used to identify CD25 Ag Immune stain Ql (Tiss) 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 CD25 Ag. It is commonly used with the system or sample type Tiss.

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 CD25 Ag. It is commonly used with the system or sample type Tiss.

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: Both
  • Method: Immune stain

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • CD25 Ag [Presence] in Tissue by Immune stain
  • CD25 Ag
  • Antigen; Antigens; CELL MARKERS; IHC; IL-2 receptor alpha chain; IL-2R; IL-2R Tac antigen; ILR2; Imm; Immunohistochemical stain; Immunostain; ImStn; Imun; Imune; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; St; Stains; Stn; Tac antigen; Tissue; Tissue, unspecified

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 Ag Immune stain Ql (Tiss)CD25 Ag [Presence] in Tissue by Immune stainCD25 Ag Tiss Ql ImStnCD25 AgCELLMARKCD25 antigen, TissuePrThr

Frequently asked questions

Code details

Code29596-4
SystemLOINC
Display nameCD25 Ag Immune stain Ql (Tiss)
DescriptionCD25 Ag
Short nameCD25 Ag Tiss Ql ImStn
ComponentCD25 Ag
PropertyPrThr
TimingPt
System (specimen)Tiss
ScaleOrd
MethodImmune stain
ClassCELLMARK
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.03
Last changed2.73

Consumer names

CD25 antigen, Tissue

Part names

CD25 AgPrThrPtTissOrdImmune stainPresence or ThresholdPoint in time (spot)Tissue and Smears

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 29596-4 | HealthAssure