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 45109-6: Chlamydia sp Ag IF Ql (Body fld)

Name: LOINC Code 45109-6: Chlamydia sp Ag IF Ql (Body fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

45109-6 is a LOINC code used to identify Chlamydia sp Ag IF Ql (Body fld) 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 Chlamydia sp Ag. It is commonly used with the system or sample type Body fld.

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 Chlamydia sp Ag. It is commonly used with the system or sample type Body fld.

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
Method: IF

What it does not mean

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

Key facts

Chlamydia sp Ag [Presence] in Body fluid by Immunofluorescence
Chlamydia sp Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Chlam; Chlamid; DFA; FA; Fl; Fld; FLU; Fluid; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; species; spp; Time Resolved Fluorescence; TRF

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 Chlamydia sp Ag IF Ql (Body fld) (45109-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Chlamydia sp Ag IF Ql (Body fld)Chlamydia sp Ag [Presence] in Body fluid by ImmunofluorescenceChlamydia Ag Fld Ql IFChlamydia sp AgMICROChlamydia sp antigen, Body fluidPrThr

Frequently asked questions

Code details

Code45109-6

SystemLOINC

Display nameChlamydia sp Ag IF Ql (Body fld)

DescriptionChlamydia sp Ag

Short nameChlamydia Ag Fld Ql IF

ComponentChlamydia sp Ag

PropertyPrThr

TimingPt

System (specimen)Body fld

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.56

Consumer names

Chlamydia sp antigen, Body fluid

Part names

Chlamydia sp AgPrThrPtBody fldOrdIFPresence or ThresholdPoint in time (spot)Body fluidImmunofluorescence (IF)

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.