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 99931-8: Nucleated cells Auto (Body fld) [#/Area]

Name: LOINC Code 99931-8: Nucleated cells Auto (Body fld) [#/Area]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:34.291Z

99931-8 is a LOINC code used to identify Nucleated cells Auto (Body fld) [#/Area] 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 Nucleated cells. It is commonly used with the system or sample type Body fld.

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 Nucleated cells. It is commonly used with the system or sample type Body fld.

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: Automated count

What it does not mean

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

Key facts

Nucleated cells [#/area] in Body fluid by Automated count
Nucleated cells
#/area; Auto; Automated detection; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Cell; Cellularity; Elec; Elect; Electr; Fl; Fld; FLU; Fluid; HEMATOLOGY/CELL COUNTS; Nuc; Nuc cell; Number areic; 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

Nucleated cells Auto (Body fld) [#/Area]Nucleated cells [#/area] in Body fluid by Automated countNuc cell #/area Fld AutoNucleated cellsHEM/BCNucleated cells, Body fluidNaric

Frequently asked questions

Code details

Code99931-8

SystemLOINC

Display nameNucleated cells Auto (Body fld) [#/Area]

DescriptionNucleated cells

Short nameNuc cell #/area Fld Auto

ComponentNucleated cells

PropertyNaric

TimingPt

System (specimen)Body fld

ScaleQn

MethodAutomated count

ClassHEM/BC

Example unitsp/HPF

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Nucleated cells, Body fluid

Part names

Nucleated cellsNaricPtBody fldQnAutomated countNumber Areic (per area)Point in time (spot)Body fluid

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.