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.

LOINCActiveBoth

LOINC Code 75921-7: Electrical potential Cerebral cortex Electroencephalogram (EEG)

Name: LOINC Code 75921-7: Electrical potential Cerebral cortex Electroencephalogram (EEG)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.386Z

75921-7 is a LOINC code used to identify Electrical potential Cerebral cortex Electroencephalogram (EEG) 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 Electrical potential. It is commonly used with the system or sample type Cerebral cortex.

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 Electrical potential. It is commonly used with the system or sample type Cerebral cortex.

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
Method: EEG

What it does not mean

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

Key facts

Electrical potential Cerebral cortex Electroencephalogram (EEG)
Electrical potential
Cereb; Ctx; Electrical potential; Electroencephalogram; NEURO; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; Voltage

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

Electrical potential Cerebral cortex Electroencephalogram (EEG)Electrical potential Ctx EEGElectrical potentialNEUROElpotPtCerebral cortex

Frequently asked questions

Code details

Code75921-7

SystemLOINC

Display nameElectrical potential Cerebral cortex Electroencephalogram (EEG)

DescriptionElectrical potential

Short nameElectrical potential Ctx EEG

ComponentElectrical potential

PropertyElpot

TimingPt

System (specimen)Cerebral cortex

ScaleQn

MethodEEG

ClassNEURO

Example unitsuv

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.69

Part names

Electrical potentialElpotPtCerebral cortexQnEEGElectrical Potential (Voltage)Point in time (spot)Electroencephalogram (EEG)

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.