LOINCActiveObservation

LOINC Code 43415-9: Unidentified cells/Cells (BM)

43415-9 is a LOINC code used to identify Unidentified 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 Unidentified 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 Unidentified 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

What it does not mean

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

Key facts

  • Unidentified cells/cells in Bone marrow
  • Unidentified cells/Cells
  • BM; BON; Bone marrow; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; NOS AB; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Unident Cells

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

Unidentified cells/Cells (BM)Unidentified cells/cells in Bone marrowUnident Cells NFr MarUnidentified cells/CellsHEM/BCUnidentified cells/cells, Bone marrowNFr

Frequently asked questions

Code details

Code43415-9
SystemLOINC
Display nameUnidentified cells/Cells (BM)
DescriptionUnidentified cells/Cells
Short nameUnident Cells NFr Mar
ComponentUnidentified cells/Cells
PropertyNFr
TimingPt
System (specimen)Bone mar
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Unidentified cells/cells, Bone marrow

Part names

Unidentified 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 43415-9 | HealthAssure