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.

LOINCBoth

LOINC Code 40344-4: Mttl1 gene.c.A3243G Ql (Bld/Tiss)

Name: LOINC Code 40344-4: Mttl1 gene.c.A3243G Ql (Bld/Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40344-4 is a LOINC code used to identify Mttl1 gene.c.A3243G Ql (Bld/Tiss) 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 Mttl1 gene.c.A3243G. It is commonly used with the system or sample type Bld/Tiss.

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 Mttl1 gene.c.A3243G. It is commonly used with the system or sample type Bld/Tiss.

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: DEPRECATED
Order vs observation: Both

What it does not mean

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

Key facts

Deprecated MTTL1 gene c.A3243G [Presence] in Blood or Tissue by Molecular genetics method
Mttl1 gene.c.A3243G
Arbitrary; Blood; Genetics; Heredity; Heritable; Inherited; Molecular pathology; MOLPATH; MOLPATH.MUTATIONS; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

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

Mttl1 gene.c.A3243G Ql (Bld/Tiss)Deprecated MTTL1 gene c.A3243G [Presence] in Blood or Tissue by Molecular genetics methodDeprecated MTTL1 c.A3243G Bld/T QlMttl1 gene.c.A3243GMOLPATH.MUTMttl1 gene c.A3243G, Blood or tissue specimenArb

Frequently asked questions

Code details

Code40344-4

SystemLOINC

Display nameMttl1 gene.c.A3243G Ql (Bld/Tiss)

DescriptionMttl1 gene.c.A3243G

Short nameDeprecated MTTL1 c.A3243G Bld/T Ql

ComponentMttl1 gene.c.A3243G

PropertyArb

TimingPt

System (specimen)Bld/Tiss

ScaleOrd

ClassMOLPATH.MUT

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.36

Consumer names

Mttl1 gene c.A3243G, Blood or tissue specimen

Part names

Mttl1 gene.c.A3243GArbPtBld/TissOrdArbitraryPoint in time (spot)Blood or Tissue

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.