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 58739-4: H. influenzae serotype Aggl Nom (Isol)

Name: LOINC Code 58739-4: H. influenzae serotype Aggl Nom (Isol)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

58739-4 is a LOINC code used to identify H. influenzae serotype Aggl Nom (Isol) 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 Haemophilus influenzae serotype. It is commonly used with the system or sample type Isolate.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Haemophilus influenzae serotype. It is commonly used with the system or sample type Isolate.

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
Method: Aggl

What it does not mean

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

Key facts

Haemophilus influenzae serotype [Identifier] in Isolate by Agglutination
Haemophilus influenzae serotype
Agg; Agglut; Agglutination; H flu; H influenza; H influenzae; Haem influ; Haem influ serotyp; Haemoph; ID; Identity or presence; Infectious Disease; InfectiousDisease; Influ; Islt; Isol; Microbiology; Nominal; Point in time; Random; Sertyp

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for H. influenzae serotype Aggl Nom (Isol) (58739-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

H. influenzae serotype Aggl Nom (Isol)Haemophilus influenzae serotype [Identifier] in Isolate by AgglutinationHaem influ Sertyp Islt AgglHaemophilus influenzae serotypeMICROPridPt

Frequently asked questions

Code details

Code58739-4

SystemLOINC

Display nameH. influenzae serotype Aggl Nom (Isol)

DescriptionHaemophilus influenzae serotype

Short nameHaem influ Sertyp Islt Aggl

ComponentHaemophilus influenzae serotype

PropertyPrid

TimingPt

System (specimen)Isolate

ScaleNom

MethodAggl

ClassMICRO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.32

Last changed2.32

Consumer names

Haemophilus influenzae serotype

Part names

Haemophilus influenzae serotypePridPtIsolateNomAgglPresence or IdentityPoint in time (spot)Agglutination

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.