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.

LOINC

LOINC Code 64739-6: Number of the largest bead that is at least as large as the left testis [PhenX]

Name: LOINC Code 64739-6: Number of the largest bead that is at least as large as the left testis [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:44.549Z

64739-6 is a LOINC code used to identify Number of the largest bead that is at least as large as the left testis [PhenX] 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 Number of the largest bead that is at least as large as the left testis. 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 Number of the largest bead that is at least as large as the left testis. 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
Method: PhenX

What it does not mean

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

Key facts

Number of the largest bead that is at least as large as the left testis [PhenX]
Number of the largest bead that is at least as large as the left testis
# of largest bead - L testis; Arterial Stenosis; Finding; Findings; L; LT; No; Nominal; Num; Point in time; Random; Testicle

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

Number of the largest bead that is at least as large as the left testis [PhenX]# of largest bead - L testis PhenXNumber of the largest bead that is at least as large as the left testisPHENXFindPt^Patient

Frequently asked questions

Code details

Code64739-6

SystemLOINC

Display nameNumber of the largest bead that is at least as large as the left testis [PhenX]

DescriptionNumber of the largest bead that is at least as large as the left testis

Short name# of largest bead - L testis PhenX

ComponentNumber of the largest bead that is at least as large as the left testis

PropertyFind

TimingPt

System (specimen)^Patient

ScaleNom

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Number of the largest bead that is at least as large as the left testisFindPt^PatientNomPhenXFindingPoint 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.