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 93021-4: Plasma cells with abnormal marker pattern/Cells counted FC (BM)

Name: LOINC Code 93021-4: Plasma cells with abnormal marker pattern/Cells counted FC (BM)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:22.239Z

93021-4 is a LOINC code used to identify Plasma cells with abnormal marker pattern/Cells counted FC (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 Plasma cells.abnormal marker pattern/Cells counted. 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 Plasma cells.abnormal marker pattern/Cells counted. 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: Flow cytometry

What it does not mean

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

Key facts

Plasma cells with abnormal marker pattern/Cells counted in Bone marrow by Flow cytometry (FC)

Plasma cells.abnormal marker pattern/Cells counted

The percent of abnormal plasma cells (% minimal residual disease) detected by flow cytometry, calculated as number of abnormal plasma cells [LOINC93017-2] divided by the total number of cells counted [LOINC: 38257-2].

abn; Abnl PCs; abnorm; BM; BON; Bone marrow; Cell; Cellularity; Dynamic; FC; HEMATOLOGY/CELL COUNTS; MAR; Mark; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Monoclonal; Myeloma cells; Number fraction; PC.abnormal; Percent; Plasmacyte; Plasmacytes; 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

Plasma cells with abnormal marker pattern/Cells counted FC (BM)Plasma cells with abnormal marker pattern/Cells counted in Bone marrow by Flow cytometry (FC)PC.abnormal/Cells NFr Mar FCPlasma cells.abnormal marker pattern/Cells countedHEM/BCPlasma cells Abnormal marker pattern/Cells Counted, Bone marrowNFr

Frequently asked questions

Code details

Code93021-4

SystemLOINC

Display namePlasma cells with abnormal marker pattern/Cells counted FC (BM)

DescriptionPlasma cells.abnormal marker pattern/Cells counted

Short namePC.abnormal/Cells NFr Mar FC

ComponentPlasma cells.abnormal marker pattern/Cells counted

PropertyNFr

TimingPt

System (specimen)Bone mar

ScaleQn

MethodFlow cytometry

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.66

Last changed2.66

Consumer names

Plasma cells Abnormal marker pattern/Cells Counted, Bone marrow

Part names

Plasma cells.abnormal marker pattern/Cells countedNFrPtBone marQnFlow cytometryNumber FractionPoint in time (spot)Bone marrowFlow cytometry (FC)

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.