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 11138-5: Myeloid cells/Erythroid cells (BM) [# ratio]

Name: LOINC Code 11138-5: Myeloid cells/Erythroid cells (BM) [# ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:21.941Z

11138-5 is a LOINC code used to identify Myeloid cells/Erythroid cells (BM) [# ratio] 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 Myeloid cells/Erythroid cells. 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 Myeloid cells/Erythroid cells. 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

Myeloid cells/Erythroid cells [# Ratio] in Bone marrow
Myeloid cells/Erythroid cells
BM; BON; Bone marrow; Cell; Cellularity; Erythroblastic series; HEMATOLOGY/CELL COUNTS; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Myelo; Number ratio; Point in time; QNT; Quan; Quant; Quantitative; Random; RBC series

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

Myeloid cells/Erythroid cells (BM) [# ratio]Myeloid cells/Erythroid cells [# Ratio] in Bone marrowMyeloid cells/Erythroid Cells MarMyeloid cells/Erythroid cellsHEM/BCMyeloid cells/Erythroid Cells, Bone marrowNRto

Frequently asked questions

Code details

Code11138-5

SystemLOINC

Display nameMyeloid cells/Erythroid cells (BM) [# ratio]

DescriptionMyeloid cells/Erythroid cells

Short nameMyeloid cells/Erythroid Cells Mar

ComponentMyeloid cells/Erythroid cells

PropertyNRto

TimingPt

System (specimen)Bone mar

ScaleQn

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.26

Consumer names

Myeloid cells/Erythroid Cells, Bone marrow

Part names

Myeloid cells/Erythroid cellsNRtoPtBone marQnNumber RatioPoint 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.