LOINC

LOINC Code 22311-5: H. pylori Ab (S) [Titer]

22311-5 is a LOINC code used to identify H. pylori Ab (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 Helicobacter pylori Ab. It is commonly used with the system or sample type Ser.

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 Helicobacter pylori Ab. 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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Helicobacter pylori Ab [Titer] in Serum
  • Helicobacter pylori Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; C pylori; Campylobacter pylori; Dilution factor; Dilution Factor (Titer); Gastro; Gastroenterology; GI; H pyl; H pylori; ID; Infectious Disease; InfectiousDisease; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Titer; Titered; Titre; Ttr

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

H. pylori Ab (S) [Titer]Deprecated Helicobacter pylori Ab [Titer] in SerumDeprecated H pylori Ab Titr SerHelicobacter pylori AbMICROHelicobacter pylori antibody, BloodTitr

Frequently asked questions

Code details

Code22311-5
SystemLOINC
Display nameH. pylori Ab (S) [Titer]
DescriptionHelicobacter pylori Ab
Short nameDeprecated H pylori Ab Titr Ser
ComponentHelicobacter pylori Ab
PropertyTitr
TimingPt
System (specimen)Ser
ScaleQn
ClassMICRO
Example unitstiter
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0n
Last changed2.36

Consumer names

Helicobacter pylori antibody, Blood

Part names

Helicobacter pylori AbTitrPtSerQnTiterPoint 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.

LOINC Code 22311-5 | HealthAssure