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 18489-5: Valproate.protein bound [Mass/Vol]

Name: LOINC Code 18489-5: Valproate.protein bound [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.589Z

18489-5 is a LOINC code used to identify Valproate.protein bound [Mass/Vol] 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 Valproate.protein bound. It is commonly used with the system or sample type Ser/Plas.

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 Valproate.protein bound. It is commonly used with the system or sample type Ser/Plas.

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

What it does not mean

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

Key facts

Valproate.protein bound [Mass/volume] in Serum or Plasma
Valproate.protein bound
Associated; bnd; Depakene; Divalproex; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; PB Valproate; Pl; Plasma; Plsm; Point in time; PR; Prot; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; VALP; Valproic acid

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

Valproate.protein bound [Mass/Vol]Valproate.protein bound [Mass/volume] in Serum or PlasmaPB Valproate SerPl-mCncValproate.protein boundDRUG/TOXValproate.protein bound, BloodMCnc

Frequently asked questions

Code details

Code18489-5

SystemLOINC

Display nameValproate.protein bound [Mass/Vol]

DescriptionValproate.protein bound

Short namePB Valproate SerPl-mCnc

ComponentValproate.protein bound

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassDRUG/TOX

Example unitsug/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.73

Consumer names

Valproate.protein bound, Blood

Part names

Valproate.protein boundMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.