LOINCActiveBoth

LOINC Code 51837-3: B. parapertussis IgG IF (S) [Titer]

51837-3 is a LOINC code used to identify B. parapertussis IgG IF (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 Bordetella parapertussis Ab.IgG. 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 Bordetella parapertussis Ab.IgG. 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
  • Method: IF

What it does not mean

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

Key facts

  • Bordetella parapertussis IgG Ab [Titer] in Serum by Immunofluorescence
  • Bordetella parapertussis Ab.IgG
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; B parapert; B parapertussis; 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; Point in time; Random; Serum; SmQn; SR; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr; Whooping cough

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

B. parapertussis IgG IF (S) [Titer]Bordetella parapertussis IgG Ab [Titer] in Serum by ImmunofluorescenceB parapert IgG Titr Ser IFBordetella parapertussis Ab.IgGMICROBordetella parapertussis IgG antibody, BloodTitr

Frequently asked questions

Code details

Code51837-3
SystemLOINC
Display nameB. parapertussis IgG IF (S) [Titer]
DescriptionBordetella parapertussis Ab.IgG
Short nameB parapert IgG Titr Ser IF
ComponentBordetella parapertussis Ab.IgG
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodIF
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.75

Consumer names

Bordetella parapertussis IgG antibody, Blood

Part names

Bordetella parapertussis Ab.IgGTitrPtSerSemiQnIFBordetella parapertussis IgGTiterPoint in time (spot)SerumImmunofluorescence (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 51837-3 | HealthAssure