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 112421-3: Beta aminoisobutyrate LC/MS/MS [Moles/Vol]

Name: LOINC Code 112421-3: Beta aminoisobutyrate LC/MS/MS [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.499Z

112421-3 is a LOINC code used to identify Beta aminoisobutyrate LC/MS/MS [Moles/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 Beta aminoisobutyrate. 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 Beta aminoisobutyrate. 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: Observation
Method: LC/MS/MS

What it does not mean

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

Key facts

Beta aminoisobutyrate [Moles/volume] in Serum or Plasma by LC/MS/MS
Beta aminoisobutyrate
3-aminoisobutyrate; 3-aminoisobutyric acid; B; B-AIB; DRUG/TOXICOLOGY; Drugs; Level; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration

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

Beta aminoisobutyrate LC/MS/MS [Moles/Vol]Beta aminoisobutyrate [Moles/volume] in Serum or Plasma by LC/MS/MSB-AIB SerPl LC/MS/MS-sCncBeta aminoisobutyrateDRUG/TOXBeta aminoisobutyrate, BloodSCnc

Frequently asked questions

Code details

Code112421-3

SystemLOINC

Display nameBeta aminoisobutyrate LC/MS/MS [Moles/Vol]

DescriptionBeta aminoisobutyrate

Short nameB-AIB SerPl LC/MS/MS-sCnc

ComponentBeta aminoisobutyrate

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodLC/MS/MS

ClassDRUG/TOX

Example unitsnmol/mL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.82

Last changed2.82

Consumer names

Beta aminoisobutyrate, Blood

Part names

Beta aminoisobutyrateSCncPtSer/PlasQnLC/MS/MSSubstance 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.