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.

LOINCBoth

LOINC Code 45111-2: Chlamydia sp Ag IF Ql (Penis)

Name: LOINC Code 45111-2: Chlamydia sp Ag IF Ql (Penis)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.175Z

45111-2 is a LOINC code used to identify Chlamydia sp Ag IF Ql (Penis) 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 Penis.

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

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: DEPRECATED
Order vs observation: Both
Method: IF

What it does not mean

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

Key facts

Deprecated Chlamydia sp Ag [Presence] in Penis by Immunofluorescence
Chlamydia sp Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; Arbitrary concentration; Chlam; Chlamid; DFA; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Pen; Penile; Point in time; 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.

Common synonyms

Chlamydia sp Ag IF Ql (Penis)Deprecated Chlamydia sp Ag [Presence] in Penis by ImmunofluorescenceDeprecated Chlamydia Ag Penis Ql IFChlamydia sp AgMICROChlamydia sp antigen, PenisACnc

Frequently asked questions

Code details

Code45111-2

SystemLOINC

Display nameChlamydia sp Ag IF Ql (Penis)

DescriptionChlamydia sp Ag

Short nameDeprecated Chlamydia Ag Penis Ql IF

ComponentChlamydia sp Ag

PropertyACnc

TimingPt

System (specimen)Penis

ScaleOrd

MethodIF

ClassMICRO

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.52

Consumer names

Chlamydia sp antigen, Penis

Part names

Chlamydia sp AgACncPtPenisOrdIFArbitrary ConcentrationPoint in time (spot)Immunofluorescence (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.