What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 105011-1: Claudin 18 Ag Immune stain Nar (Tiss) [Interp]

Name: LOINC Code 105011-1: Claudin 18 Ag Immune stain Nar (Tiss) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.132Z

105011-1 is a LOINC code used to identify Claudin 18 Ag Immune stain Nar (Tiss) [Interp] 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 Claudin 18 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 Claudin 18 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

Claudin 18 Ag [Interpretation] in Tissue by Immune stain Narrative
Claudin 18 Ag
Antigen; Antigens; IHC; Imm; Immunohistochemical stain; Immunostain; Impression; Impression/interpretation of study; Impressions; ImStn; Imun; Imune; Interp; Interpretation; Narrative; Pathology; Point in time; Random; Report; St; Stains; Stn; 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

Claudin 18 Ag Immune stain Nar (Tiss) [Interp]Claudin 18 Ag [Interpretation] in Tissue by Immune stain NarrativeClaudin 18 Ag Tiss ImStn-ImpClaudin 18 AgPATHInterpretation of Claudin 18 antigen test result, TissueImp

Frequently asked questions

Code details

Code105011-1

SystemLOINC

Display nameClaudin 18 Ag Immune stain Nar (Tiss) [Interp]

DescriptionClaudin 18 Ag

Short nameClaudin 18 Ag Tiss ImStn-Imp

ComponentClaudin 18 Ag

PropertyImp

TimingPt

System (specimen)Tiss

ScaleNar

MethodImmune stain

ClassPATH

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.78

Last changed2.82

Consumer names

Interpretation of Claudin 18 antigen test result, Tissue

Part names

Claudin 18 AgImpPtTissNarImmune stainImpression/interpretation of studyPoint 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.