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 40425-1: CYP2D6 gene allele genotype Molgen (Bld/Tiss)

Name: LOINC Code 40425-1: CYP2D6 gene allele genotype Molgen (Bld/Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40425-1 is a LOINC code used to identify CYP2D6 gene allele genotype Molgen (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 CYP2D6 gene allele. 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 CYP2D6 gene allele. 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: ACTIVE
Order vs observation: Both
Method: Molgen

What it does not mean

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

Key facts

CYP2D6 gene allele [Genotype] in Blood or Tissue by Molecular genetics method Nominal

CYP2D6 gene allele

The patient's CYP2D6 allelic genotype (e.g. *1/*2A) based on analysis of multiple variants (e.g. *2,*2A,*3-*12,*14,*15,*17,*19, etc.) as well as gene deletions, duplications and rearrangements within the CYP2D6 gene. The example answers provided with this code are a small representative of the CYP2D6 allelic genotypes. For a complete list of CYP2D6 alleles, see the The Human Cytochrome P450 (CYP) Allele Nomenclature Database (http//www.cypalleles.ki.se).

Blood; CPD6; CYP2D; CYP2D@; CYP2D6 allele; CYP2D7AP; CYP2D7BP; CYP2D7P2; CYP2D8P2; CYP2DL1; CYPIID6; Cytochrome p450; cytochrome P450, family 2, subfamily D, polypeptide 6; Debrisoquine hydroxylation gene; Genetics; Heredity; Heritable; HGNC2629; Inherited; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.PHARMG; Nominal; P450C2D; P450DB1; P450-DB1; PCR; Point in time; Random; 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

CYP2D6 gene allele genotype Molgen (Bld/Tiss)CYP2D6 gene allele [Genotype] in Blood or Tissue by Molecular genetics method NominalCYP2D6 allele Geno Bld/TCYP2D6 gene alleleMOLPATH.PHARMGCYP2D6 gene allele genotype, Blood or tissue specimenGeno

Frequently asked questions

Code details

Code40425-1

SystemLOINC

Display nameCYP2D6 gene allele genotype Molgen (Bld/Tiss)

DescriptionCYP2D6 gene allele

Short nameCYP2D6 allele Geno Bld/T

ComponentCYP2D6 gene allele

PropertyGeno

TimingPt

System (specimen)Bld/Tiss

ScaleNom

MethodMolgen

ClassMOLPATH.PHARMG

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.73

Consumer names

CYP2D6 gene allele genotype, Blood or tissue specimen

Part names

CYP2D6 gene alleleGenoPtBld/TissNomMolgenGenotypePoint in time (spot)Blood or TissueMolecular genetics

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.