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LOINC Code 75518-1: Bacteria identified LA Nom (CSF)

75518-1 is a LOINC code used to identify Bacteria identified LA Nom (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 Bacteria. It is commonly used with the system or sample type CSF.

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 Bacteria. 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: ACTIVE
  • Order vs observation: Both
  • Method: LA

What it does not mean

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

Key facts

Bacteria identified in Cerebral spinal fluid by Latex agglutination
Bacteria
A latex agglutination test for antigens in CSF in cases of suspected bacterial meningitis. The most common bacteria antigens tested for are Haemophilus influenzae; Streptococcus pneumoniae; Neisseria meningitidis A; Neisseria meningitidis B; Neisseria meningitidis C. Because the primary purpose is the identification of N. meningitidis, S. pneumoniae, and H. influenzae from clinical specimens collected from suspected cases of bacterial meningitis, the methods do not allow identification of other isolates that may be of clinical importance but are less likely encountered. In the US rarely used due to very poor positive predictive value. Occasionally used to diagnose bacterial meningitis in a patient who is pre-treated with antibiotics. Given current vaccines available in the US (examplepneumococcal, haemophilus influenzae type b (Hib) vaccine), bacterial meningitis is a rare event in the US.
Bact; Cerebral spinal fluid; Cerebrospinal Fl; ID; Identity or presence; Infectious Disease; InfectiousDisease; LAT; Latex agglutination; Microbiology; Neuro; Neurology; Nominal; Point in time; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Bacteria identified LA Nom (CSF)Bacteria identified in Cerebral spinal fluid by Latex agglutinationBacteria CSF LABacteriaMICROBacterial test, Spinal fluidPrid

Frequently asked questions

Code details

Code75518-1
SystemLOINC
Display nameBacteria identified LA Nom (CSF)
DescriptionBacteria
Short nameBacteria CSF LA
ComponentBacteria
PropertyPrid
TimingPt
System (specimen)CSF
ScaleNom
MethodLA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.50
Last changed2.78

Consumer names

Bacterial test, Spinal fluid

Part names

BacteriaPridPtCSFNomLAPresence or IdentityPoint in time (spot)Cerebral spinal fluidLatex agglutination

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 75518-1 | HealthAssure