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LOINC Code 49147-2: R. prowazekii IgM (Body fld) [Titer]

49147-2 is a LOINC code used to identify R. prowazekii IgM (Body fld) [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 Rickettsia prowazekii Ab.IgM. It is commonly used with the system or sample type Body fld.

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 Rickettsia prowazekii Ab.IgM. It is commonly used with the system or sample type Body fld.

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

  • Rickettsia prowazekii IgM Ab [Titer] in Body fluid
  • Rickettsia prowazekii Ab.IgM
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Brill-zinsser disease; Dilution factor; Dilution Factor (Titer); Epidemic typhus; Fl; Fld; FLU; Fluid; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Point in time; R prowazek; R prowazekii; Random; Recrudescent typhus; Ricket; Rickettsial; SmQn; Sporadic typhus; Titer; Titered; Titre; Ttr; Typhus

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

R. prowazekii IgM (Body fld) [Titer]Rickettsia prowazekii IgM Ab [Titer] in Body fluidR prowazek IgM Titr FldRickettsia prowazekii Ab.IgMMICRORickettsia prowazekii IgM antibody, Body fluidTitr

Frequently asked questions

Code details

Code49147-2
SystemLOINC
Display nameR. prowazekii IgM (Body fld) [Titer]
DescriptionRickettsia prowazekii Ab.IgM
Short nameR prowazek IgM Titr Fld
ComponentRickettsia prowazekii Ab.IgM
PropertyTitr
TimingPt
System (specimen)Body fld
ScaleSemiQn
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.21
Last changed2.75

Consumer names

Rickettsia prowazekii IgM antibody, Body fluid

Part names

Rickettsia prowazekii Ab.IgMTitrPtBody fldSemiQnRickettsia prowazekii IgMTiterPoint in time (spot)Body fluid

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.