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 14228-1: Cells.estrogen receptor/Cells Immune stain (Tiss)

Name: LOINC Code 14228-1: Cells.estrogen receptor/Cells Immune stain (Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:24.421Z

14228-1 is a LOINC code used to identify Cells.estrogen receptor/Cells Immune stain (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 Cells.estrogen receptor/Cells. 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 Cells.estrogen receptor/Cells. 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

Cells.estrogen receptor/cells in Tissue by Immune stain
Cells.estrogen receptor/Cells
Cell; Cellularity; ER; ER+ cells; ERA; Est; Estr; Estroge; Estrogens; Estrone+estradiol; Estrone+estradiol+estriol; IHC; Imm; Immunohistochemical stain; Immunostain; ImStn; Imun; Imune; Number fraction; Oncology; PATHOLOGY; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Rec; Recept; Receptors; Recp; Recptr; 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

Cells.estrogen receptor/Cells Immune stain (Tiss)Cells.estrogen receptor/cells in Tissue by Immune stainER+ cells NFr Tiss ImStnCells.estrogen receptor/CellsPATHCells.estrogen receptor/cells, TissueNFr

Frequently asked questions

Code details

Code14228-1

SystemLOINC

Display nameCells.estrogen receptor/Cells Immune stain (Tiss)

DescriptionCells.estrogen receptor/Cells

Short nameER+ cells NFr Tiss ImStn

ComponentCells.estrogen receptor/Cells

PropertyNFr

TimingPt

System (specimen)Tiss

ScaleQn

MethodImmune stain

ClassPATH

Example units% tumor cells positive

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0k

Last changed2.79

Consumer names

Cells.estrogen receptor/cells, Tissue

Part names

Cells.estrogen receptor/CellsNFrPtTissQnImmune stainNumber FractionPoint 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.