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 22170-5: C. pneumoniae IgA (S) [Titer]

Name: LOINC Code 22170-5: C. pneumoniae IgA (S) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

22170-5 is a LOINC code used to identify C. pneumoniae IgA (S) [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.IgA. It is commonly used with the system or sample type Ser.

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.IgA. It is commonly used with the system or sample type Ser.

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 pneumoniae IgA Ab [Titer] in Serum
Chlamydophila pneumoniae Ab.IgA
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; C pneum; C pneumo; C pneumoniae; Chlamydia; Chlamydia pneumoniae; CPN; Dilution factor; Dilution Factor (Titer); ID; Immune globulin A; Immunoglobulin A; Infectious Disease; InfectiousDisease; Microbiology; Pneu; pneum; Pneumo; Pneumon; Pneumonia; Point in time; Random; Serum; SmQn; SR; Titer; Titered; Titre; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for C. pneumoniae IgA (S) [Titer] (22170-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

C. pneumoniae IgA (S) [Titer]Chlamydophila pneumoniae IgA Ab [Titer] in SerumC pneum IgA Titr SerChlamydophila pneumoniae Ab.IgAMICROChlamydophila pneumoniae IgA antibody, BloodTitr

Frequently asked questions

Code details

Code22170-5

SystemLOINC

Display nameC. pneumoniae IgA (S) [Titer]

DescriptionChlamydophila pneumoniae Ab.IgA

Short nameC pneum IgA Titr Ser

ComponentChlamydophila pneumoniae Ab.IgA

PropertyTitr

TimingPt

System (specimen)Ser

ScaleSemiQn

ClassMICRO

Example unitstiter

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.75

Consumer names

Chlamydophila pneumoniae IgA antibody, Blood

Part names

Chlamydophila pneumoniae Ab.IgATitrPtSerSemiQnChlamydophila pneumoniae IgATiterPoint in time (spot)Serum

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.