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LOINC Code 82905-1: t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript Molgen (BM) [Log # ratio]

82905-1 is a LOINC code used to identify t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript Molgen (BM) [Log # 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 t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript. It is commonly used with the system or sample type Bone mar.

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 t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript. It is commonly used with the system or sample type Bone mar.

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

t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript [Log Number Ratio] in Bone marrow by Molecular genetics method
t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript
The level of fusion gene transcript in the test sample is expressed as a log reduction; i.e., log10 of the ratio of chimeric BCR-ABL/normal ABL mRNA transcript seen in individuals with untreated CML (Chronic Myelogenous Leukemia) as compared to the ratio seen in the patient. In Quest's laboratory data, the median of BCR-ABL/ABL Ratio in previously untreated CML patients is 4.1325 in peripheral blood samples (N=120) and 5.09 in bone marrow samples (N=109). Based on the IRIS study (New England Journal of Medicine, 2003, 33491423-1432), it is not necessary to know the BCR-ABL:ABL ratio of a patient at baseline to calculate the subsequent change and this calculation should be based on the above-mentioned median. Based on this study, a 3 log of higher reduction by 12 months of therapy is associated with negligible risk of disease progression during the subsequent 12 months with patients are treated with imatinib. The following formula is used for calculating log reduction by Quest Laboratories: LOG10(4.1325)-LOG10 (BCR-ABL:ABL ratio) Unit/Log Reduction. Information from Quest Diagnostics. 2006 12 06.
ABL; ABL1; ABL1 transcript; ALL; bcr/abl; BCR1; bcr-abl1; BM; BON; Bone marrow; Breakpoint cluster region; Chronic myeloid leukemia; CML; control gene; D22S11; D22S662; DNA; gene fusion; gene translocation; Genetics; Heredity; Heritable; Inherited; JTK7; Log Nrto; Log number ratio; major breakpoints; MAR; Marrow (bone); Mbr; Mcr; minimal angle of resolution; Minimum angle of resolution; minor breakpoints; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.TRANSLOCATION; p150; PCR; Ph chromosome; Philadelphia chromosome; PHL; Point in time; QNT; Quan; Quant; Quantitative; Random; RNA; T prime; t(9,22)(ABL1,BCR) gene translocation; t(9,22)(ABL1,BCR) Translocation; t(9,22)(q34,q11); t(9,22)(q34.1,q11); t(9;22)(ABL1,BCR); translocation; v-abl Abelson murine leukemia viral oncogene homolog 1

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

t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript Molgen (BM) [Log # ratio]t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript [Log Number Ratio] in Bone marrow by Molecular genetics methodt(9;22)(ABL1,BCR)/control Mar-LnRtot(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcriptMOLPATH.TRNLOCt(9;22)(q34.1;q11)(ABL1,BCR)/control Transcript, Bone marrowLnRto

Frequently asked questions

Code details

Code82905-1
SystemLOINC
Display namet(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript Molgen (BM) [Log # ratio]
Descriptiont(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript
Short namet(9;22)(ABL1,BCR)/control Mar-LnRto
Componentt(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcript
PropertyLnRto
TimingPt
System (specimen)Bone mar
ScaleQn
MethodMolgen
ClassMOLPATH.TRNLOC
Example unitsLog Reduction
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.58

Consumer names

t(9;22)(q34.1;q11)(ABL1,BCR)/control Transcript, Bone marrow

Part names

t(9;22)(q34.1;q11)(ABL1,BCR) fusion transcript/control transcriptLnRtoPtBone marQnMolgenLog Number RatioPoint in time (spot)Bone marrowMolecular 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.

LOINC Code 82905-1 | HealthAssure