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.

LOINCOrder

LOINC Code 109738-5: R. rickettsii IgG (CSF) [Measurement]

Name: LOINC Code 109738-5: R. rickettsii IgG (CSF) [Measurement]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:21.043Z

109738-5 is a LOINC code used to identify R. rickettsii IgG (CSF) [Measurement] 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 rickettsii Ab.IgG. It is commonly used with the system or sample type CSF.

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 Rickettsia rickettsii 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: TRIAL
Order vs observation: Order

What it does not mean

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

Key facts

Rickettsia rickettsii IgG Ab [Measurement] in Cerebral spinal fluid

Rickettsia rickettsii Ab.IgG

This term is intended to collate similar measurements for the LOINC SNOMED CT Collaboration in an ontological view. Additionally, it can be used to communicate a laboratory order, either alone or in combination with specimen or other information in the order. It may NOT be used to report back the measured patient value. [https//lo.inc/ce2mb6]

ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Immune globulin G; Immunoglobulin G; Lab orders; Msmt; R rickettsi; R rickettsii; Ricket; Rickettsial; RMSF; Rocky mountain spotted fever; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Spotted fever

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. rickettsii IgG (CSF) [Measurement]Rickettsia rickettsii IgG Ab [Measurement] in Cerebral spinal fluidR rickettsi IgG Msmt CSFRickettsia rickettsii Ab.IgGLABORDERS.ONTOLOGYRickettsia rickettsii IgG antibody, Spinal fluid{Measurement}

Frequently asked questions

Code details

Code109738-5

SystemLOINC

Display nameR. rickettsii IgG (CSF) [Measurement]

DescriptionRickettsia rickettsii Ab.IgG

Short nameR rickettsi IgG Msmt CSF

ComponentRickettsia rickettsii Ab.IgG

Property{Measurement}

Timing-

System (specimen)CSF

Scale-

ClassLABORDERS.ONTOLOGY

StatusTRIAL

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.81

Last changed2.81

Consumer names

Rickettsia rickettsii IgG antibody, Spinal fluid

Part names

Rickettsia rickettsii Ab.IgG{Measurement}-CSFRickettsia rickettsii IgGMeasurementCerebral spinal 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.