LOINC

LOINC Code 29361-3: S. pneumoniae group B Ag Ql (CSF)

29361-3 is a LOINC code used to identify S. pneumoniae group B Ag Ql (CSF) 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 Streptococcus pneumoniae group B Ag. 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 Streptococcus pneumoniae group B Ag. 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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Streptococcus pneumoniae group B Ag in CSF
  • Streptococcus pneumoniae group B Ag
  • Antigen; Antigens; Arbitrary concentration; Cerebral spinal fluid; Cerebrospinal Fl; ID; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; QL; Qual; Qualitative; Random; S pneumo; S pneumoniae; Screen; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Spn; Strep; Strept

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

S. pneumoniae group B Ag Ql (CSF)Deprecated Streptococcus pneumoniae group B Ag in CSFDeprecated S pneumB Ag CSF QlStreptococcus pneumoniae group B AgMICROStreptococcus pneumoniae group B antigen, Spinal fluidACnc

Frequently asked questions

Code details

Code29361-3
SystemLOINC
Display nameS. pneumoniae group B Ag Ql (CSF)
DescriptionStreptococcus pneumoniae group B Ag
Short nameDeprecated S pneumB Ag CSF Ql
ComponentStreptococcus pneumoniae group B Ag
PropertyACnc
TimingPt
System (specimen)CSF
ScaleOrd
ClassMICRO
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.03
Last changed2.40

Consumer names

Streptococcus pneumoniae group B antigen, Spinal fluid

Part names

Streptococcus pneumoniae group B AgACncPtCSFOrdAgArbitrary ConcentrationPoint in time (spot)Cerebral 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.

LOINC Code 29361-3 | HealthAssure