LOINCActiveBoth

LOINC Code 44903-3: Malignant cells/Cells (BM)

44903-3 is a LOINC code used to identify Malignant cells/Cells (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 Malignant 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 Malignant 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: Both

What it does not mean

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

Key facts

  • Malignant cells/cells in Bone marrow
  • Malignant cells/Cells
  • BM; BON; Bone marrow; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; Malig; 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

Malignant cells/Cells (BM)Malignant cells/cells in Bone marrowMalignant cells NFr MarMalignant cells/CellsHEM/BCMalignant cells/cells, Bone marrowNFr

Frequently asked questions

Code details

Code44903-3
SystemLOINC
Display nameMalignant cells/Cells (BM)
DescriptionMalignant cells/Cells
Short nameMalignant cells NFr Mar
ComponentMalignant cells/Cells
PropertyNFr
TimingPt
System (specimen)Bone mar
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.79

Consumer names

Malignant cells/cells, Bone marrow

Part names

Malignant cells/CellsNFrPtBone marQnNumber 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 44903-3 | HealthAssure