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 40685-0: Interpretation IEP (CSF) [Interp]

Name: LOINC Code 40685-0: Interpretation IEP (CSF) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.146Z

40685-0 is a LOINC code used to identify Interpretation IEP (CSF) [Interp] 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 Interpretation. It is commonly used with the system or sample type CSF.

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 Interpretation. It is commonly used with the system or sample type CSF.

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: Immunoelectrophoresis

What it does not mean

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

Key facts

Immunoelectrophoresis for Cerebral spinal fluid
Interpretation
Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; IEP; Imm elect; Immunoelect; Impression; Impression/interpretation of study; Impressions; Interp; Interpret; Interpretation; Interpt; Intrp; Nominal; Point in time; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Interpretation IEP (CSF) [Interp]Immunoelectrophoresis for Cerebral spinal fluidInterpretation CSF IEP-ImpInterpretationCHEMInterpretation of IEP test, Spinal fluidImp

Frequently asked questions

Code details

Code40685-0

SystemLOINC

Display nameInterpretation IEP (CSF) [Interp]

DescriptionInterpretation

Short nameInterpretation CSF IEP-Imp

ComponentInterpretation

PropertyImp

TimingPt

System (specimen)CSF

ScaleNom

MethodImmunoelectrophoresis

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.54

Consumer names

Interpretation of IEP test, Spinal fluid

Part names

InterpretationImpPtCSFNomImmunoelectrophoresisImpression/interpretation of studyPoint in time (spot)Cerebral spinal 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.