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.

LOINCActiveObservation

LOINC Code 74223-9: Immunohistochemical stains Nar (BM)

Name: LOINC Code 74223-9: Immunohistochemical stains Nar (BM)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:53.974Z

74223-9 is a LOINC code used to identify Immunohistochemical stains Nar (BM) 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 Immunohistochemical stains. It is commonly used with the system or sample type Bone mar.

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 Immunohistochemical stains. It is commonly used with the system or sample type Bone mar.

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

Immunohistochemical stains in Bone marrow Narrative
Immunohistochemical stains
Narrative description and results in the bone marrow pathology report of immunohistochemical (IHC) stains performed.
BM; BON; Bone marrow; Finding; Findings; HEMATOLOGY/CELL COUNTS; IHC stains; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Narrative; Point in time; Random; Report

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

Immunohistochemical stains Nar (BM)Immunohistochemical stains in Bone marrow NarrativeIHC stains MarImmunohistochemical stainsHEM/BCImmunohistochemical stains, Bone marrowFind

Frequently asked questions

Code details

Code74223-9

SystemLOINC

Display nameImmunohistochemical stains Nar (BM)

DescriptionImmunohistochemical stains

Short nameIHC stains Mar

ComponentImmunohistochemical stains

PropertyFind

TimingPt

System (specimen)Bone mar

ScaleNar

ClassHEM/BC

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.46

Last changed2.46

Consumer names

Immunohistochemical stains, Bone marrow

Part names

Immunohistochemical stainsFindPtBone marNarFindingPoint in time (spot)Bone marrow

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.