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.

LOINCObservation

LOINC Code 46742-3: Isovaleric Acidemia/2-Methylbutyric Acidemia (DBS) [Interp]

Name: LOINC Code 46742-3: Isovaleric Acidemia/2-Methylbutyric Acidemia (DBS) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.753Z

46742-3 is a LOINC code used to identify Isovaleric Acidemia/2-Methylbutyric Acidemia (DBS) [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 Isovaleric acidemia &or 2-Methylbutyric acidemia. It is commonly used with the system or sample type Bld.dot.

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 Isovaleric acidemia &or 2-Methylbutyric acidemia. It is commonly used with the system or sample type Bld.dot.

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: DISCOURAGED
Order vs observation: Observation

What it does not mean

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

Key facts

Isovaleric Acidemia/2-Methylbutyric Acidemia newborn screen interpretation
Isovaleric acidemia &or 2-Methylbutyric acidemia
Blood; Chemistry; DBS; Dried blood spot; Filter paper; FP; II; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; IVA; IVA/2-Me-butyr Acidemia; Nominal; Point in time; Random; WB; Whole blood

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

Isovaleric Acidemia/2-Methylbutyric Acidemia (DBS) [Interp]Isovaleric Acidemia/2-Methylbutyric Acidemia newborn screen interpretationIVA/2-Me-butyr Acidemia DBS-ImpIsovaleric acidemia &or 2-Methylbutyric acidemiaCHEMIsovaleric acidemia/2-Methylbutyric acidemia, Dried blood spotImp

Frequently asked questions

Code details

Code46742-3

SystemLOINC

Display nameIsovaleric Acidemia/2-Methylbutyric Acidemia (DBS) [Interp]

DescriptionIsovaleric acidemia &or 2-Methylbutyric acidemia

Short nameIVA/2-Me-butyr Acidemia DBS-Imp

ComponentIsovaleric acidemia &or 2-Methylbutyric acidemia

PropertyImp

TimingPt

System (specimen)Bld.dot

ScaleNom

ClassCHEM

StatusDISCOURAGED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.19

Last changed2.44

Consumer names

Isovaleric acidemia/2-Methylbutyric acidemia, Dried blood spot

Part names

Isovaleric acidemia &or 2-Methylbutyric acidemiaImpPtBld.dotNomIsovaleric Acidemia/2-Methylbutyric AcidemiaImpression/interpretation of studyPoint in time (spot)DBS

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.