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.

LOINCActiveObservation

LOINC Code 82499-5: TRBV4 gene segments/TRBV gene segments.total (Bld)

Name: LOINC Code 82499-5: TRBV4 gene segments/TRBV gene segments.total (Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:08.165Z

82499-5 is a LOINC code used to identify TRBV4 gene segments/TRBV gene segments.total (Bld) 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 TRBV4 gene segments/TRBV gene segments.total. It is commonly used with the system or sample type Bld.

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 TRBV4 gene segments/TRBV gene segments.total. It is commonly used with the system or sample type Bld.

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: Observation

What it does not mean

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

Key facts

TRBV4 gene segments/TRBV gene segments.total in Blood

TRBV4 gene segments/TRBV gene segments.total

This assay represents the fraction of T-cell receptor beta chain variable gene segments that are in the TRBV4 gene family out of the total number of TRBV gene segments identified ("diversity ratio"). At the time this term was created, TRBV4 included the following gene segmentsTRBV4-1, TRBV4-2, and TRBV4-3. Because some portion of TRBV gene segments that are counted in the total will not correspond to any of the probes and therefore will not be identified as belonging to a specific TRBV gene family, the total of the diversity ratios reported will not equal 100%.

Blood; Genetics; Heredity; Heritable; Inherited; Molecular pathology; MOLPATH; Number Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Tot; Totl; TRBV seg total; TRBV4 seg; WB; Whole blood

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

TRBV4 gene segments/TRBV gene segments.total (Bld)TRBV4 gene segments/TRBV gene segments.total in BloodTRBV4 seg/TRBV seg total NFr BldTRBV4 gene segments/TRBV gene segments.totalMOLPATHTRBV4 gene segments/TRBV gene Segments.total, BloodNFr

Frequently asked questions

Code details

Code82499-5

SystemLOINC

Display nameTRBV4 gene segments/TRBV gene segments.total (Bld)

DescriptionTRBV4 gene segments/TRBV gene segments.total

Short nameTRBV4 seg/TRBV seg total NFr Bld

ComponentTRBV4 gene segments/TRBV gene segments.total

PropertyNFr

TimingPt

System (specimen)Bld

ScaleQn

ClassMOLPATH

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.58

Last changed2.58

Consumer names

TRBV4 gene segments/TRBV gene Segments.total, Blood

Part names

TRBV4 gene segments/TRBV gene segments.totalNFrPtBldQnNumber FractionPoint in time (spot)Blood

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.