LOINCActiveObservation

LOINC Code 46749-8: 3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic Ql (DBS) [Interp]

46749-8 is a LOINC code used to identify 3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic Ql (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 3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconic. 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 3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconic. 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: ACTIVE
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • 3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic newborn screen interpretation
  • 3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconic
  • 3-Methylcrotonic/HMG/3MGA; Blood; Chemistry; DBS; Dried blood spot; Filter paper; FP; III; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; 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

3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic Ql (DBS) [Interp]3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic newborn screen interpretation3-Methylcrotonic/HMG/3MGA DBS-Imp3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconicCHEM3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic, Dried blood spotImp

Frequently asked questions

Code details

Code46749-8
SystemLOINC
Display name3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic Ql (DBS) [Interp]
Description3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconic
Short name3-Methylcrotonic/HMG/3MGA DBS-Imp
Component3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconic
PropertyImp
TimingPt
System (specimen)Bld.dot
ScaleOrd
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.19
Last changed2.29

Consumer names

3-Methylcrotonic/Hydroxymethylglutaric/Methylglutaconic, Dried blood spot

Part names

3-Methylcrotonic &or hydroxymethylglutaric &or methylglutaconicImpPtBld.dotOrd3-Methylcrotonic/Hydroxymethylglutaric/MethylglutaconicImpression/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.

LOINC Code 46749-8 | HealthAssure