LOINCActiveBoth

LOINC Code 31780-0: C. psittaci Ag Ql (Specimen)

31780-0 is a LOINC code used to identify C. psittaci Ag 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 Chlamydophila psittaci 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 Chlamydophila psittaci 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

What it does not mean

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

Key facts

  • Chlamydophila psittaci Ag [Presence] in Specimen
  • Chlamydophila psittaci Ag
  • Antigen; Antigens; Avian chlamydiosis; C psittaci; Chlamydia; Chlamydia psittaci; Chlamydial abortion; CPS; Enzootic abortion of ewes; ID; Infectious Disease; InfectiousDisease; Microbiology; Misc; Miscellaneous; Ordinal; Ornithosis; Other; Ovine chlamydiosis; Point in time; PR; Psittacosis; QL; Qual; Qualitative; Random; Screen; Spec; To be specified in another part of the message; 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. psittaci Ag Ql (Specimen)Chlamydophila psittaci Ag [Presence] in SpecimenC psittaci Ag Spec QlChlamydophila psittaci AgMICROChlamydophila psittaci antigen, SpecimenPrThr

Frequently asked questions

Code details

Code31780-0
SystemLOINC
Display nameC. psittaci Ag Ql (Specimen)
DescriptionChlamydophila psittaci Ag
Short nameC psittaci Ag Spec Ql
ComponentChlamydophila psittaci Ag
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.07
Last changed2.69

Consumer names

Chlamydophila psittaci antigen, Specimen

Part names

Chlamydophila psittaci AgPrThrPtXXXOrdPresence 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.

LOINC Code 31780-0 | HealthAssure