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LOINC Code 81254-5: Genomic allele start-end

81254-5 is a LOINC code used to identify Genomic allele start-end 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 Variant exact start-end. It is commonly used with the system or sample type ^Patient.

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 Variant exact start-end. It is commonly used with the system or sample type ^Patient.

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: TRIAL
  • Order vs observation: Observation

What it does not mean

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

Key facts

Genomic allele start-end
Variant exact start-end
The variant start-end location is the first genomic position in the reference allele that contains a change from the reference allele. For example, for the simple variant NM_014049.4(ACAD9)c.1249C>T (p.Arg417Cys), the variant exact start-end location is Chr3: 128906220 on Assembly GRCh38. [http://www.ncbi.nlm.nih.gov/clinvar/variation/30880/]
Ident; Identifier; Molecular pathology; MOLPATH; Nominal; Point in time; Random; Started

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

Genomic allele start-endGen allele loc IDVariant exact start-endMOLPATHIDPt^Patient

Frequently asked questions

Code details

Code81254-5
SystemLOINC
Display nameGenomic allele start-end
DescriptionVariant exact start-end
Short nameGen allele loc ID
ComponentVariant exact start-end
PropertyID
TimingPt
System (specimen)^Patient
ScaleNom
ClassMOLPATH
StatusTRIAL
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.68

Consumer names

Variant exact start-end

Part names

Variant exact start-endIDPt^PatientNomIdentifierPoint in time (spot)

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 81254-5 | HealthAssure