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.

LOINCActiveBoth

LOINC Code 104864-4: Beta lactamase.extended spectrum Ql (Isol)

Name: LOINC Code 104864-4: Beta lactamase.extended spectrum Ql (Isol)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.131Z

104864-4 is a LOINC code used to identify Beta lactamase.extended spectrum Ql (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 Beta lactamase.extended spectrum. It is commonly used with the system or sample type Isolate.

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 Beta lactamase.extended spectrum. 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: Both

What it does not mean

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

Key facts

Beta lactamase.extended spectrum [Presence]
Beta lactamase.extended spectrum
ANTIBIOTIC SUSCEPTIBILITIES; B; Betalactamase; B-Lactamase; B-Lactamase Extended; Cefinase; ESBL; Islt; Isol; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen

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

Beta lactamase.extended spectrum Ql (Isol)Beta lactamase.extended spectrum [Presence]B-Lactamase Extended Islt QlBeta lactamase.extended spectrumABXBACTPrThrPt

Frequently asked questions

Code details

Code104864-4

SystemLOINC

Display nameBeta lactamase.extended spectrum Ql (Isol)

DescriptionBeta lactamase.extended spectrum

Short nameB-Lactamase Extended Islt Ql

ComponentBeta lactamase.extended spectrum

PropertyPrThr

TimingPt

System (specimen)Isolate

ScaleOrd

ClassABXBACT

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.78

Last changed2.78

Consumer names

Beta lactamase.extended spectrum

Part names

Beta lactamase.extended spectrumPrThrPtIsolateOrdPresence or ThresholdPoint 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.