LOINCActiveObservation

LOINC Code 40689-2: Erythroid cells/Cells Manual cnt (BM)

40689-2 is a LOINC code used to identify Erythroid cells/Cells Manual cnt (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 Erythroid cells/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 Erythroid cells/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
  • Method: Manual count

What it does not mean

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

Key facts

  • Erythroid cells/cells in Bone marrow by Manual count
  • Erythroid cells/Cells
  • BM; BON; Bone marrow; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; Manl; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Erythroid cells/Cells Manual cnt (BM)Erythroid cells/cells in Bone marrow by Manual countErythroid Cells NFr Mar ManualErythroid cells/CellsHEM/BCErythroid cells/cells, Bone marrowNFr

Frequently asked questions

Code details

Code40689-2
SystemLOINC
Display nameErythroid cells/Cells Manual cnt (BM)
DescriptionErythroid cells/Cells
Short nameErythroid Cells NFr Mar Manual
ComponentErythroid cells/Cells
PropertyNFr
TimingPt
System (specimen)Bone mar
ScaleQn
MethodManual count
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.15
Last changed2.79

Consumer names

Erythroid cells/cells, Bone marrow

Part names

Erythroid cells/CellsNFrPtBone marQnManual countNumber FractionPoint 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.

LOINC Code 40689-2 | HealthAssure