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LOINC Code 109799-7: N. meningitidis B Ag (CSF) [Measurement]

109799-7 is a LOINC code used to identify N. meningitidis B Ag (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 Neisseria meningitidis serogroup 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 Neisseria meningitidis serogroup 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: TRIAL
  • Order vs observation: Order

What it does not mean

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

Key facts

Neisseria meningitidis serogroup B Ag [Measurement] in Cerebral spinal fluid
Neisseria meningitidis serogroup B Ag
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]
Antigen; Antigens; Cerebral spinal fluid; Cerebrospinal Fl; Group B; Lab orders; Mening; Meningid; Meningitis; Meningo; Meningococcal meningitis; Meningococcus; Msmt; N men; N men serogroup; N men sg B; N men sg B Ag; N menigitidis; N meningitidis; Neisseria meningitidis group B; Neisseria meningitidis type B; 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

N. meningitidis B Ag (CSF) [Measurement]Neisseria meningitidis serogroup B Ag [Measurement] in Cerebral spinal fluidN men sg B Ag Msmt CSFNeisseria meningitidis serogroup B AgLABORDERS.ONTOLOGYNeisseria meningitidis serogroup B antigen, Spinal fluid{Measurement}

Frequently asked questions

Code details

Code109799-7
SystemLOINC
Display nameN. meningitidis B Ag (CSF) [Measurement]
DescriptionNeisseria meningitidis serogroup B Ag
Short nameN men sg B Ag Msmt CSF
ComponentNeisseria meningitidis serogroup B Ag
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

Neisseria meningitidis serogroup B antigen, Spinal fluid

Part names

Neisseria meningitidis serogroup B Ag{Measurement}-CSFMeasurementCerebral 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 109799-7 | HealthAssure