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 72503-6: WT1 gene exon 1+2 transcript/control transcript Molgen (Bld/Tiss) [# ratio]

Name: LOINC Code 72503-6: WT1 gene exon 1+2 transcript/control transcript Molgen (Bld/Tiss) [# ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:51.525Z

72503-6 is a LOINC code used to identify WT1 gene exon 1+2 transcript/control transcript Molgen (Bld/Tiss) [# ratio] 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 WT1 gene exon 1+2 transcript/control transcript. 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 WT1 gene exon 1+2 transcript/control transcript. 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

WT1 gene exon 1+2 transcript/control transcript [# Ratio] in Blood or Tissue by Molecular genetics method

WT1 gene exon 1+2 transcript/control transcript

Wilm's tumor (WT1) gene expression is calculated by measuring the copy numbers of transcripts within exon 1 and 2 of the WTI gene compared to transcripts from a control gene. The WT1 gene expression is used as a specific molecular marker to improve diagnosis, prognosis and follow-up of adult acute myeloid leukemia (AML) patients. Early decreased expression of WT1 copy number in peripheral blood predicts better outcome for AML patients [PMID20107153]. This code is based on, but not limited in use to, the submitter's package insert, Ipsogen's ProfileQuant® kit. This kit uses real-time quantitative PCR to quantify WT1 gene expression relative to ABL1 control gene.

ABL; ABL1; ABL1 transcript; AWT1; Blood; control gene; EWS-WT1; Genetics; GUD; Heredity; Heritable; i; II; Inherited; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.MUTATIONS; NPHS4; Number ratio; PCR; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified; WAGR; WB; Whole blood; Whole blood or Tissue; Wilms tumor 1; WIT-2; WT1 ex 1+2; WT33

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

WT1 gene exon 1+2 transcript/control transcript Molgen (Bld/Tiss) [# ratio]WT1 gene exon 1+2 transcript/control transcript [# Ratio] in Blood or Tissue by Molecular genetics methodWT1 ex 1+2/control Bld/TWT1 gene exon 1+2 transcript/control transcriptMOLPATH.MUTWT1 gene Exon 1+2 transcript/control Transcript, Blood or tissue specimenNRto

Frequently asked questions

Code details

Code72503-6

SystemLOINC

Display nameWT1 gene exon 1+2 transcript/control transcript Molgen (Bld/Tiss) [# ratio]

DescriptionWT1 gene exon 1+2 transcript/control transcript

Short nameWT1 ex 1+2/control Bld/T

ComponentWT1 gene exon 1+2 transcript/control transcript

PropertyNRto

TimingPt

System (specimen)Bld/Tiss

ScaleQn

MethodMolgen

ClassMOLPATH.MUT

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.42

Last changed2.42

Consumer names

WT1 gene Exon 1+2 transcript/control Transcript, Blood or tissue specimen

Part names

WT1 gene exon 1+2 transcript/control transcriptNRtoPtBld/TissQnMolgenNumber RatioPoint 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.