LOINCActiveBoth

LOINC Code 6355-2: C. trachomatis Ag IF Ql (Specimen)

6355-2 is a LOINC code used to identify C. trachomatis Ag IF Ql (Specimen) 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 trachomatis Ag. It is commonly used with the system or sample type XXX.

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 trachomatis Ag. It is commonly used with the system or sample type XXX.

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 trachomatis Ag [Presence] in Specimen by Immunofluorescence
  • Chlamydia trachomatis Ag
  • 3 subspecies cause LGV
  • ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; C trac; C trach; C tracho; C trachomatis; Chlam; Chlam trac; Chlamid; CT; DFA; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; LGV; Lymphogranuloma venereum; Microbiology; Misc; Miscellaneous; Ordinal; Other; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; Time Resolved Fluorescence; To be specified in another part of the message; Trachoma; TRF; Unspecified

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

C. trachomatis Ag IF Ql (Specimen)Chlamydia trachomatis Ag [Presence] in Specimen by ImmunofluorescenceC trach Ag Spec Ql IFChlamydia trachomatis AgMICROChlamydia trachomatis antigen, SpecimenPrThr

Frequently asked questions

Code details

Code6355-2
SystemLOINC
Display nameC. trachomatis Ag IF Ql (Specimen)
DescriptionChlamydia trachomatis Ag
Short nameC trach Ag Spec Ql IF
ComponentChlamydia trachomatis Ag
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
MethodIF
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0f
Last changed2.73

Consumer names

Chlamydia trachomatis antigen, Specimen

Part names

Chlamydia trachomatis AgPrThrPtXXXOrdIFPresence or ThresholdPoint 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.

LOINC Code 6355-2 | HealthAssure