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LOINC Code 16582-9: C. pneumoniae IgG IF (CSF) [Titer]

16582-9 is a LOINC code used to identify C. pneumoniae IgG IF (CSF) [Titer] 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 pneumoniae Ab.IgG. It is commonly used with the system or sample type CSF.

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 Chlamydophila pneumoniae Ab.IgG. It is commonly used with the system or sample type CSF.

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

  • Chlamydophila pneumoniae IgG Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
  • Chlamydophila pneumoniae Ab.IgG
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; C pneum; C pneumo; C pneumoniae; Cerebral spinal fluid; Cerebrospinal Fl; Chlamydia; Chlamydia pneumoniae; CPN; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Pneu; pneum; Pneumo; Pneumon; Pneumonia; Point in time; Random; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr; Twar agent

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. pneumoniae IgG IF (CSF) [Titer]Chlamydophila pneumoniae IgG Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceC pneum IgG Titr CSF IFChlamydophila pneumoniae Ab.IgGMICROChlamydophila pneumoniae IgG antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code16582-9
SystemLOINC
Display nameC. pneumoniae IgG IF (CSF) [Titer]
DescriptionChlamydophila pneumoniae Ab.IgG
Short nameC pneum IgG Titr CSF IF
ComponentChlamydophila pneumoniae Ab.IgG
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodIF
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.75

Consumer names

Chlamydophila pneumoniae IgG antibody, Spinal fluid

Part names

Chlamydophila pneumoniae Ab.IgGTitrPtCSFSemiQnIFChlamydophila pneumoniae IgGTiterPoint in time (spot)Cerebral spinal 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.

LOINC Code 16582-9 | HealthAssure