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 90458-1: Actinomyces sp identified Org specific cx Nom (Asp)

Name: LOINC Code 90458-1: Actinomyces sp identified Org specific cx Nom (Asp)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:19.830Z

90458-1 is a LOINC code used to identify Actinomyces sp identified Org specific cx Nom (Asp) 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 Actinomyces sp. It is commonly used with the system or sample type Asp.

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 Actinomyces sp. It is commonly used with the system or sample type Asp.

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: Organism specific culture

What it does not mean

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

Key facts

Actinomyces sp identified in Aspirate by Organism specific culture
Actinomyces sp
Actino; Aspirate; C&S; Cult; Cultures; ID; Identity or presence; Infectious Disease; InfectiousDisease; Microbiology; Nominal; Point in time; Random; Spec; species; spp

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

Actinomyces sp identified Org specific cx Nom (Asp)Actinomyces sp identified in Aspirate by Organism specific cultureActinomyces Aspirate CultActinomyces spMICROActinomyces sp culture, AspiratePrid

Frequently asked questions

Code details

Code90458-1

SystemLOINC

Display nameActinomyces sp identified Org specific cx Nom (Asp)

DescriptionActinomyces sp

Short nameActinomyces Aspirate Cult

ComponentActinomyces sp

PropertyPrid

TimingPt

System (specimen)Asp

ScaleNom

MethodOrganism specific culture

ClassMICRO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.65

Last changed2.79

Consumer names

Actinomyces sp culture, Aspirate

Part names

Actinomyces spPridPtAspNomOrganism specific culturePresence or IdentityPoint in time (spot)Aspirate

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.